[
  {
    "provider": "ai21",
    "model_id": "jamba-large",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2,
    "effective_from": "2025-07-03",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.ai21.com/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "jamba-large-1.7-2025-07."
  },
  {
    "provider": "ai21",
    "model_id": "jamba-large",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 8,
    "effective_from": "2025-07-03",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.ai21.com/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "ai21",
    "model_id": "jamba-mini",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.2,
    "effective_from": "2026-01-01",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.ai21.com/pricing/",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "jamba-mini-2-2026-01; price verified, exact release day not first-party-stated (Jan 2026)."
  },
  {
    "provider": "ai21",
    "model_id": "jamba-mini",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.4,
    "effective_from": "2026-01-01",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.ai21.com/pricing/",
    "source_kind": "provider_live",
    "confidence": "inferred"
  },
  {
    "provider": "alibaba",
    "model_id": "qwen-flash",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.05,
    "effective_from": "2025-07-28",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "qwen-flash-2025-07-28."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen-flash",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.4,
    "effective_from": "2025-07-28",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "alibaba",
    "model_id": "qwen-max",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.6,
    "effective_from": "2025-01-25",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "qwen-max-2025-01-25."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen-max",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 6.4,
    "effective_from": "2025-01-25",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "alibaba",
    "model_id": "qwen-plus",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.4,
    "effective_from": "2025-12-01",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "qwen-plus-2025-12-01. Output is the non-thinking rate; thinking output is $4."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen-plus",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 1.2,
    "effective_from": "2025-12-01",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "alibaba",
    "model_id": "qwen-turbo",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.05,
    "effective_from": "2025-04-28",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "qwen-turbo-2025-04-28. Non-thinking output; deprecated (Alibaba recommends qwen-flash)."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen-turbo",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.2,
    "effective_from": "2025-04-28",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3-coder-plus",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1,
    "effective_from": "2025-07-22",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "qwen3-coder-plus. Base input tier (<=32K)."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3-coder-plus",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2025-07-22",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3-max",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.2,
    "effective_from": "2026-01-23",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "qwen3-max-2026-01-23. International (Singapore), base input tier (<=32K)."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3-max",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 6,
    "effective_from": "2026-01-23",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3.5-flash",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.1,
    "effective_from": "2026-02-23",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "qwen3.5-flash-2026-02-23."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3.5-flash",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.4,
    "effective_from": "2026-02-23",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3.5-plus",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.4,
    "effective_from": "2026-02-15",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "qwen3.5-plus-2026-02-15."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3.5-plus",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 2.4,
    "effective_from": "2026-02-15",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3.6-flash",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.25,
    "effective_from": "2026-04-27",
    "effective_to": null,
    "last_validated_at": "2026-06-29",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "International deployment scope (intl USD), Model Studio \"Model inference pricing\"; base/standard tier."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3.6-flash",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 1.5,
    "effective_from": "2026-04-27",
    "effective_to": null,
    "last_validated_at": "2026-06-29",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "International deployment scope (intl USD), Model Studio \"Model inference pricing\"; base/standard tier."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3.6-plus",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2026-04-02",
    "effective_to": null,
    "last_validated_at": "2026-07-08",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "International deployment scope (intl USD), Model Studio \"Model inference pricing\"; base/standard tier. First-party re-confirmed 2026-07-08; the intl-USD tier sits above OpenRouter's routed (domestic) price, so the reseller-vs-first-party cross-check flag is an expected false positive here, not a wrong price."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3.6-plus",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 3,
    "effective_from": "2026-04-02",
    "effective_to": null,
    "last_validated_at": "2026-07-08",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "International deployment scope (intl USD), Model Studio \"Model inference pricing\"; base/standard tier. First-party re-confirmed 2026-07-08; the intl-USD tier sits above OpenRouter's routed (domestic) price, so the reseller-vs-first-party cross-check flag is an expected false positive here, not a wrong price."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3.7-max",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-05-21",
    "effective_to": null,
    "last_validated_at": "2026-07-08",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "International deployment scope (intl USD), Model Studio \"Model inference pricing\"; base/standard tier. First-party re-confirmed 2026-07-08; the intl-USD tier sits above OpenRouter's routed (domestic) price, so the reseller-vs-first-party cross-check flag is an expected false positive here, not a wrong price."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3.7-max",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 7.5,
    "effective_from": "2026-05-21",
    "effective_to": null,
    "last_validated_at": "2026-07-08",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "International deployment scope (intl USD), Model Studio \"Model inference pricing\"; base/standard tier. First-party re-confirmed 2026-07-08; the intl-USD tier sits above OpenRouter's routed (domestic) price, so the reseller-vs-first-party cross-check flag is an expected false positive here, not a wrong price."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3.7-plus",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.4,
    "effective_from": "2026-06-03",
    "effective_to": null,
    "last_validated_at": "2026-06-29",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "International deployment scope (intl USD), Model Studio \"Model inference pricing\"; base/standard tier."
  },
  {
    "provider": "alibaba",
    "model_id": "qwen3.7-plus",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 1.6,
    "effective_from": "2026-06-03",
    "effective_to": null,
    "last_validated_at": "2026-06-29",
    "source_url": "https://www.alibabacloud.com/help/en/model-studio/model-pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "International deployment scope (intl USD), Model Studio \"Model inference pricing\"; base/standard tier."
  },
  {
    "provider": "amazon",
    "model_id": "nova-2-lite",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.3,
    "effective_from": "2025-12-02",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://aws.amazon.com/nova/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "amazon.nova-2-lite-v1:0."
  },
  {
    "provider": "amazon",
    "model_id": "nova-2-lite",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2025-12-02",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://aws.amazon.com/nova/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "amazon",
    "model_id": "nova-2-pro",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://aws.amazon.com/bedrock/pricing/",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: no independent corroboration (new model, no OpenRouter match). Nova 2.0 Pro. us-east-1, on-demand (cross-region-global profile where AWS publishes one). From the AWS Bedrock Price List API."
  },
  {
    "provider": "amazon",
    "model_id": "nova-2-pro",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2026-06-29",
    "effective_to": null,
    "last_validated_at": "2026-06-29",
    "source_url": "https://aws.amazon.com/bedrock/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record. Nova 2.0 Pro. us-east-1, on-demand (cross-region-global profile where AWS publishes one). From the AWS Bedrock Price List API."
  },
  {
    "provider": "amazon",
    "model_id": "nova-2-pro",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://aws.amazon.com/bedrock/pricing/",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: no independent corroboration (new model, no OpenRouter match). Nova 2.0 Pro. us-east-1, on-demand (cross-region-global profile where AWS publishes one). From the AWS Bedrock Price List API."
  },
  {
    "provider": "amazon",
    "model_id": "nova-2-pro",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-06-29",
    "effective_to": null,
    "last_validated_at": "2026-06-29",
    "source_url": "https://aws.amazon.com/bedrock/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record. Nova 2.0 Pro. us-east-1, on-demand (cross-region-global profile where AWS publishes one). From the AWS Bedrock Price List API."
  },
  {
    "provider": "amazon",
    "model_id": "nova-lite",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.06,
    "effective_from": "2024-12-03",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://aws.amazon.com/nova/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "amazon.nova-lite-v1:0."
  },
  {
    "provider": "amazon",
    "model_id": "nova-lite",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.24,
    "effective_from": "2024-12-03",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://aws.amazon.com/nova/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "amazon",
    "model_id": "nova-micro",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.035,
    "effective_from": "2024-12-03",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://aws.amazon.com/nova/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "amazon.nova-micro-v1:0. US East, on-demand Standard tier."
  },
  {
    "provider": "amazon",
    "model_id": "nova-micro",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.14,
    "effective_from": "2024-12-03",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://aws.amazon.com/nova/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "amazon",
    "model_id": "nova-premier",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2025-04-30",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://aws.amazon.com/nova/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "amazon.nova-premier-v1:0. GA 2025-04."
  },
  {
    "provider": "amazon",
    "model_id": "nova-premier",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 12.5,
    "effective_from": "2025-04-30",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://aws.amazon.com/nova/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "amazon",
    "model_id": "nova-pro",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.8,
    "effective_from": "2024-12-03",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://aws.amazon.com/nova/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "amazon.nova-pro-v1:0."
  },
  {
    "provider": "amazon",
    "model_id": "nova-pro",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 3.2,
    "effective_from": "2024-12-03",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://aws.amazon.com/nova/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-3-5-haiku-20241022",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1,
    "effective_from": "2024-11-04",
    "effective_to": "2024-12-03",
    "last_validated_at": "2024-11-05",
    "source_url": "https://web.archive.org/web/20241105102333/https://www.anthropic.com/news/3-5-models-and-computer-use",
    "source_kind": "wayback",
    "source_snapshot_ts": "20241105102333",
    "confidence": "archived",
    "notes": "Claude 3.5 Haiku LAUNCH price (4x the Claude 3 Haiku 0.25/1.25). Anthropic's own post: '11/04/2024: revised pricing for Claude 3.5 Haiku ... now priced at $1 MTok input / $5 MTok output'. Cut to 0.80/4 on 2024-12-03."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-3-5-haiku-20241022",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.8,
    "effective_from": "2024-12-03",
    "effective_to": "2026-02-19",
    "last_validated_at": "2024-12-03",
    "source_url": "https://web.archive.org/web/20241203010242/https://www.anthropic.com/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20241203010242",
    "confidence": "archived",
    "notes": "Claude 3.5 Haiku revised down to 0.80/4 on 2024-12-03; held until retirement 2026-02-19."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-3-5-haiku-20241022",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2024-11-04",
    "effective_to": "2024-12-03",
    "last_validated_at": "2024-11-05",
    "source_url": "https://web.archive.org/web/20241105102333/https://www.anthropic.com/news/3-5-models-and-computer-use",
    "source_kind": "wayback",
    "source_snapshot_ts": "20241105102333",
    "confidence": "archived"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-3-5-haiku-20241022",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 4,
    "effective_from": "2024-12-03",
    "effective_to": "2026-02-19",
    "last_validated_at": "2024-12-03",
    "source_url": "https://web.archive.org/web/20241203010242/https://www.anthropic.com/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20241203010242",
    "confidence": "archived"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-3-5-sonnet-20240620",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 3,
    "effective_from": "2024-06-20",
    "effective_to": "2025-10-28",
    "last_validated_at": "2024-06-24",
    "source_url": "https://web.archive.org/web/20240624062926/https://www.anthropic.com/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20240624062926",
    "confidence": "archived",
    "notes": "Claude 3.5 Sonnet, stated in anthropic.com/news/claude-3-5-sonnet. Retired 2025-10-28."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-3-5-sonnet-20240620",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 15,
    "effective_from": "2024-06-20",
    "effective_to": "2025-10-28",
    "last_validated_at": "2024-06-24",
    "source_url": "https://web.archive.org/web/20240624062926/https://www.anthropic.com/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20240624062926",
    "confidence": "archived"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-3-7-sonnet-20250219",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 3,
    "effective_from": "2025-02-24",
    "effective_to": "2026-02-19",
    "last_validated_at": "2025-02-24",
    "source_url": "https://web.archive.org/web/20250224210640/https://www.anthropic.com/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20250224210640",
    "confidence": "archived",
    "notes": "Claude 3.7 Sonnet, stated in anthropic.com/news/claude-3-7-sonnet. Retired 2026-02-19."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-3-7-sonnet-20250219",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 15,
    "effective_from": "2025-02-24",
    "effective_to": "2026-02-19",
    "last_validated_at": "2025-02-24",
    "source_url": "https://web.archive.org/web/20250224210640/https://www.anthropic.com/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20250224210640",
    "confidence": "archived"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-3-haiku-20240307",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.25,
    "effective_from": "2024-03-04",
    "effective_to": "2026-04-20",
    "last_validated_at": "2024-03-04",
    "source_url": "https://web.archive.org/web/20240304143754/https://www.anthropic.com/api",
    "source_kind": "wayback",
    "source_snapshot_ts": "20240304143754",
    "confidence": "archived",
    "notes": "Claude 3 Haiku launch price, published in the launch-day pricing block (model GA mid-March 2024). Retired 2026-04-20."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-3-haiku-20240307",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2024-03-04",
    "effective_to": "2026-04-20",
    "last_validated_at": "2024-03-04",
    "source_url": "https://web.archive.org/web/20240304143754/https://www.anthropic.com/api",
    "source_kind": "wayback",
    "source_snapshot_ts": "20240304143754",
    "confidence": "archived"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-3-opus-20240229",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 15,
    "effective_from": "2024-03-04",
    "effective_to": "2026-01-05",
    "last_validated_at": "2024-03-04",
    "source_url": "https://web.archive.org/web/20240304143754/https://www.anthropic.com/api",
    "source_kind": "wayback",
    "source_snapshot_ts": "20240304143754",
    "confidence": "archived",
    "notes": "Claude 3 launch pricing, archive-confirmed in the launch-day pricing block; also stated in anthropic.com/news/claude-3-family. Retired 2026-01-05 per the Anthropic model-deprecations page."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-3-opus-20240229",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 75,
    "effective_from": "2024-03-04",
    "effective_to": "2026-01-05",
    "last_validated_at": "2024-03-04",
    "source_url": "https://web.archive.org/web/20240304143754/https://www.anthropic.com/api",
    "source_kind": "wayback",
    "source_snapshot_ts": "20240304143754",
    "confidence": "archived"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-3-sonnet-20240229",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 3,
    "effective_from": "2024-03-04",
    "effective_to": "2025-07-21",
    "last_validated_at": "2024-03-04",
    "source_url": "https://web.archive.org/web/20240304143754/https://www.anthropic.com/api",
    "source_kind": "wayback",
    "source_snapshot_ts": "20240304143754",
    "confidence": "archived",
    "notes": "Claude 3 launch pricing. Retired 2025-07-21."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-3-sonnet-20240229",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 15,
    "effective_from": "2024-03-04",
    "effective_to": "2025-07-21",
    "last_validated_at": "2024-03-04",
    "source_url": "https://web.archive.org/web/20240304143754/https://www.anthropic.com/api",
    "source_kind": "wayback",
    "source_snapshot_ts": "20240304143754",
    "confidence": "archived"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-fable-5",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 1,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-fable-5",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 20,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-fable-5",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 12.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-fable-5",
    "unit": "usd_per_mtok",
    "effective_from": "2026-06-09",
    "effective_to": null,
    "last_validated_at": "2026-06-12",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "variation": "input",
    "price_usd": 10,
    "notes": "Claude Fable 5, Anthropic's first public Mythos-class model, launched 2026-06-09. Listed API price (2x Opus 4.5 at $5/$25). Free for Pro/Max/Team/Enterprise plans through 2026-06-22; standard metered rate from 2026-06-23."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-fable-5",
    "unit": "usd_per_mtok",
    "effective_from": "2026-06-09",
    "effective_to": null,
    "last_validated_at": "2026-06-12",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "variation": "output",
    "price_usd": 50
  },
  {
    "provider": "anthropic",
    "model_id": "claude-haiku-4-5-20251001",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.1,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-haiku-4-5"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-haiku-4-5-20251001",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 2,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-haiku-4-5"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-haiku-4-5-20251001",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-haiku-4-5"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-haiku-4-5-20251001",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1,
    "effective_from": "2025-10-15",
    "effective_to": null,
    "last_validated_at": "2026-06-16",
    "source_url": "https://www.anthropic.com/news/claude-haiku-4-5",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-haiku-4-5"
    ],
    "notes": "Haiku 4.5 at $1/$5 (NOT the older 3.5-Haiku $0.80/$4). GA/announcement 2025-10-15; the snapshot id encodes 2025-10-01. Both dated and short forms emitted; dated is canonical, short is an alias."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-haiku-4-5-20251001",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2025-10-15",
    "effective_to": null,
    "last_validated_at": "2026-06-16",
    "source_url": "https://www.anthropic.com/news/claude-haiku-4-5",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-haiku-4-5"
    ],
    "notes": "Haiku 4.5 at $1/$5 (NOT the older 3.5-Haiku $0.80/$4). GA/announcement 2025-10-15; the snapshot id encodes 2025-10-01. Both dated and short forms emitted; dated is canonical, short is an alias."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-mythos-5",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 1,
    "effective_from": "2026-06-22",
    "effective_to": "2026-06-29",
    "last_validated_at": "2026-06-22",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "Inferred pending first-party confirmation; superseded 2026-06-29 by the verified record at the same price."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-mythos-5",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 1,
    "effective_from": "2026-06-29",
    "effective_to": null,
    "last_validated_at": "2026-06-29",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-mythos-5",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 20,
    "effective_from": "2026-06-22",
    "effective_to": "2026-06-29",
    "last_validated_at": "2026-06-22",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "Inferred pending first-party confirmation; superseded 2026-06-29 by the verified record at the same price."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-mythos-5",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 20,
    "effective_from": "2026-06-29",
    "effective_to": null,
    "last_validated_at": "2026-06-29",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-mythos-5",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 12.5,
    "effective_from": "2026-06-22",
    "effective_to": "2026-06-29",
    "last_validated_at": "2026-06-22",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "Inferred pending first-party confirmation; superseded 2026-06-29 by the verified record at the same price."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-mythos-5",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 12.5,
    "effective_from": "2026-06-29",
    "effective_to": null,
    "last_validated_at": "2026-06-29",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-mythos-5",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-06-22",
    "effective_to": "2026-06-29",
    "last_validated_at": "2026-06-22",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "Inferred pending first-party confirmation; superseded 2026-06-29 by the verified record at the same price."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-mythos-5",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-06-29",
    "effective_to": null,
    "last_validated_at": "2026-06-29",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-mythos-5",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 50,
    "effective_from": "2026-06-22",
    "effective_to": "2026-06-29",
    "last_validated_at": "2026-06-22",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "Inferred pending first-party confirmation; superseded 2026-06-29 by the verified record at the same price."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-mythos-5",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 50,
    "effective_from": "2026-06-29",
    "effective_to": null,
    "last_validated_at": "2026-06-29",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-1-20250805",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 1.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-opus-4-1"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-1-20250805",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 30,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-opus-4-1"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-1-20250805",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 18.75,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-opus-4-1"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-1-20250805",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 15,
    "effective_from": "2025-08-05",
    "effective_to": null,
    "last_validated_at": "2026-06-16",
    "source_url": "https://www.anthropic.com/news/claude-opus-4-1",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-opus-4-1"
    ],
    "notes": "Opus 4.1 at the original $15/$75 Opus tier. Deprecated 2026-06-05 with scheduled retirement 2026-08-05 (per the model-deprecations page); retirement is in the FUTURE so effective_to stays null (model still current) per the locked modeling rule."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-1-20250805",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 75,
    "effective_from": "2025-08-05",
    "effective_to": null,
    "last_validated_at": "2026-06-16",
    "source_url": "https://www.anthropic.com/news/claude-opus-4-1",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-opus-4-1"
    ],
    "notes": "Opus 4.1 at the original $15/$75 Opus tier. Deprecated 2026-06-05 with scheduled retirement 2026-08-05 (per the model-deprecations page); retirement is in the FUTURE so effective_to stays null (model still current) per the locked modeling rule."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-20250514",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 1.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-20250514",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 30,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-20250514",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 18.75,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-20250514",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 15,
    "effective_from": "2025-05-14",
    "effective_to": null,
    "last_validated_at": "2026-06-12",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Opus 4 flagship tier. effective_from is the dated snapshot release date."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-20250514",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 75,
    "effective_from": "2025-05-14",
    "effective_to": null,
    "last_validated_at": "2026-06-12",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-5-20251101",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-opus-4-5"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-5-20251101",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-opus-4-5"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-5-20251101",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 6.25,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-opus-4-5"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-5-20251101",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2025-11-01",
    "effective_to": null,
    "last_validated_at": "2026-06-12",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-opus-4-5"
    ],
    "notes": "Opus 4.5 cut the Opus flagship input price from 15 to 5 per Mtok."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-5-20251101",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 25,
    "effective_from": "2025-11-01",
    "effective_to": null,
    "last_validated_at": "2026-06-12",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-opus-4-5"
    ]
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-6",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-6",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-6",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 6.25,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-6",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2026-02-05",
    "effective_to": null,
    "last_validated_at": "2026-06-16",
    "source_url": "https://www.anthropic.com/news/claude-opus-4-6",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Opus 4.6 at the post-4.5 lower tier ($5/$25 standard). Short undated id is what Claude Code emits; no dated form in the wild, so short id is canonical."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-6",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 25,
    "effective_from": "2026-02-05",
    "effective_to": null,
    "last_validated_at": "2026-06-16",
    "source_url": "https://www.anthropic.com/news/claude-opus-4-6",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Opus 4.6 at the post-4.5 lower tier ($5/$25 standard). Short undated id is what Claude Code emits; no dated form in the wild, so short id is canonical."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-7",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-7",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-7",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 6.25,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-7",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2026-04-16",
    "effective_to": null,
    "last_validated_at": "2026-06-16",
    "source_url": "https://www.anthropic.com/news/claude-opus-4-7",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Opus 4.7 standard $5/$25. New tokenizer may consume more tokens per task but per-token price unchanged."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-7",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 25,
    "effective_from": "2026-04-16",
    "effective_to": null,
    "last_validated_at": "2026-06-16",
    "source_url": "https://www.anthropic.com/news/claude-opus-4-7",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Opus 4.7 standard $5/$25. New tokenizer may consume more tokens per task but per-token price unchanged."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-8",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-8",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-8",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 6.25,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-8",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2026-05-28",
    "effective_to": null,
    "last_validated_at": "2026-06-16",
    "source_url": "https://www.anthropic.com/news/claude-opus-4-8",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Current Claude Code Opus flagship, standard $5/$25."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-4-8",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 25,
    "effective_from": "2026-05-28",
    "effective_to": null,
    "last_validated_at": "2026-06-16",
    "source_url": "https://www.anthropic.com/news/claude-opus-4-8",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Current Claude Code Opus flagship, standard $5/$25."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-5",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2026-07-24",
    "effective_to": null,
    "last_validated_at": "2026-07-25",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-5",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-07-24",
    "effective_to": null,
    "last_validated_at": "2026-07-25",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-5",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 6.25,
    "effective_from": "2026-07-24",
    "effective_to": null,
    "last_validated_at": "2026-07-25",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-5",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2026-07-24",
    "effective_to": null,
    "last_validated_at": "2026-07-25",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-opus-5",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 25,
    "effective_from": "2026-07-24",
    "effective_to": null,
    "last_validated_at": "2026-07-25",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-20250514",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.3,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-20250514",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 6,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-20250514",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 3.75,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-20250514",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 3,
    "effective_from": "2025-05-14",
    "effective_to": null,
    "last_validated_at": "2026-06-16",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Sonnet 4 launch tier; $3/$15 input/output since 2025-05-14, unchanged. Listed on the live pricing page (retired on the first-party API, available on Bedrock and Vertex AI). effective_from is the dated snapshot release date. Mirrors the Opus 4 sibling record; was missing from the initial backfill."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-20250514",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 15,
    "effective_from": "2025-05-14",
    "effective_to": null,
    "last_validated_at": "2026-06-16",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-5-20250929",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.3,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-sonnet-4-5"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-5-20250929",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 6,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-sonnet-4-5"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-5-20250929",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 3.75,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-sonnet-4-5"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-5-20250929",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 3,
    "effective_from": "2025-09-29",
    "effective_to": null,
    "last_validated_at": "2026-06-12",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-sonnet-4-5"
    ]
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-5-20250929",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 15,
    "effective_from": "2025-09-29",
    "effective_to": null,
    "last_validated_at": "2026-06-12",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "claude-sonnet-4-5"
    ]
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-6",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.3,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-6",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 6,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-6",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 3.75,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-6",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 3,
    "effective_from": "2026-02-17",
    "effective_to": null,
    "last_validated_at": "2026-06-16",
    "source_url": "https://www.anthropic.com/news/claude-sonnet-4-6",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Sonnet holds the $3/$15 tier. Short undated id is what Claude Code emits; canonical."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-4-6",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 15,
    "effective_from": "2026-02-17",
    "effective_to": null,
    "last_validated_at": "2026-06-16",
    "source_url": "https://www.anthropic.com/news/claude-sonnet-4-6",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Sonnet holds the $3/$15 tier. Short undated id is what Claude Code emits; canonical."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-5",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.2,
    "effective_from": "2026-07-01",
    "effective_to": null,
    "last_validated_at": "2026-07-01",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Introductory pricing, in effect through 2026-08-31; standard pricing rises to $3/$15 per MTok input/output on 2026-09-01 (surfaced as a sentinel CHANGED price for a bitemporal interval edit when it lands). effective_from is the first first-party validation date - Anthropic’s pricing page does not state a launch date."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-5",
    "variation": "cache_write_1h",
    "unit": "usd_per_mtok",
    "price_usd": 4,
    "effective_from": "2026-07-01",
    "effective_to": null,
    "last_validated_at": "2026-07-01",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Introductory pricing, in effect through 2026-08-31; standard pricing rises to $3/$15 per MTok input/output on 2026-09-01 (surfaced as a sentinel CHANGED price for a bitemporal interval edit when it lands). effective_from is the first first-party validation date - Anthropic’s pricing page does not state a launch date."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-5",
    "variation": "cache_write_5m",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-07-01",
    "effective_to": null,
    "last_validated_at": "2026-07-01",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Introductory pricing, in effect through 2026-08-31; standard pricing rises to $3/$15 per MTok input/output on 2026-09-01 (surfaced as a sentinel CHANGED price for a bitemporal interval edit when it lands). effective_from is the first first-party validation date - Anthropic’s pricing page does not state a launch date."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-5",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2,
    "effective_from": "2026-07-01",
    "effective_to": null,
    "last_validated_at": "2026-07-01",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Introductory pricing, in effect through 2026-08-31; standard pricing rises to $3/$15 per MTok input/output on 2026-09-01 (surfaced as a sentinel CHANGED price for a bitemporal interval edit when it lands). effective_from is the first first-party validation date - Anthropic’s pricing page does not state a launch date."
  },
  {
    "provider": "anthropic",
    "model_id": "claude-sonnet-5",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-07-01",
    "effective_to": null,
    "last_validated_at": "2026-07-01",
    "source_url": "https://docs.claude.com/en/docs/about-claude/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Introductory pricing, in effect through 2026-08-31; standard pricing rises to $3/$15 per MTok input/output on 2026-09-01 (surfaced as a sentinel CHANGED price for a bitemporal interval edit when it lands). effective_from is the first first-party validation date - Anthropic’s pricing page does not state a launch date."
  },
  {
    "provider": "cohere",
    "model_id": "command-a-plus",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-05-20",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://docs.cohere.com/docs/command-a",
    "source_kind": "provider_live",
    "confidence": "archived",
    "notes": "Archived 2026-06-21: Cohere moved command-a to an open-weights/free tier on cohere.com/pricing and no longer publishes a first-party per-token API price. Last verified price (2026-06-17) retained."
  },
  {
    "provider": "cohere",
    "model_id": "command-a-plus",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-05-20",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://docs.cohere.com/docs/command-a",
    "source_kind": "provider_live",
    "confidence": "archived"
  },
  {
    "provider": "cohere",
    "model_id": "command-r",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.15,
    "effective_from": "2024-08-30",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://cohere.com/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "command-r-08-2024."
  },
  {
    "provider": "cohere",
    "model_id": "command-r",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.6,
    "effective_from": "2024-08-30",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://cohere.com/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "cohere",
    "model_id": "command-r-plus",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2024-08-30",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://docs.cohere.com/docs/command-r-plus",
    "source_kind": "provider_live",
    "confidence": "archived",
    "notes": "Archived 2026-06-21: removed from Cohere's live pricing payload on cohere.com/pricing; no first-party per-token API price published. Last verified price (2026-06-17) retained."
  },
  {
    "provider": "cohere",
    "model_id": "command-r-plus",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2024-08-30",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://docs.cohere.com/docs/command-r-plus",
    "source_kind": "provider_live",
    "confidence": "archived"
  },
  {
    "provider": "cohere",
    "model_id": "command-r7b",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.0375,
    "effective_from": "2024-12-13",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://cohere.com/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "command-r7b-12-2024."
  },
  {
    "provider": "cohere",
    "model_id": "command-r7b",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.15,
    "effective_from": "2024-12-13",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://cohere.com/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "deepseek",
    "model_id": "deepseek-v4-flash",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.0028,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://api-docs.deepseek.com/quick_start/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "deepseek-chat",
      "deepseek-reasoner"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "deepseek",
    "model_id": "deepseek-v4-flash",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.14,
    "effective_from": "2026-04-24",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://api-docs.deepseek.com/quick_start/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Cache-miss (standard, non-cached) input. Cache-hit input is $0.0028/Mtok. Date = DeepSeek-V4 launch per the first-party change log. Legacy deepseek-chat / deepseek-reasoner aliases map here and retire 2026-07-24."
  },
  {
    "provider": "deepseek",
    "model_id": "deepseek-v4-flash",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.28,
    "effective_from": "2026-04-24",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://api-docs.deepseek.com/quick_start/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "deepseek",
    "model_id": "deepseek-v4-pro",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.003625,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://api-docs.deepseek.com/quick_start/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "deepseek",
    "model_id": "deepseek-v4-pro",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.435,
    "effective_from": "2026-06-01",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://api-docs.deepseek.com/quick_start/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "Cache-miss (standard) price. The price is first-party (live pricing page) but DeepSeek's change log does not date the cut; date inferred 2026-06-01 (the 75% promo became the permanent list price). Cache-hit input is $0.003625/Mtok."
  },
  {
    "provider": "deepseek",
    "model_id": "deepseek-v4-pro",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.435,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://api-docs.deepseek.com/quick_start/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "deepseek",
    "model_id": "deepseek-v4-pro",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.87,
    "effective_from": "2026-06-01",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://api-docs.deepseek.com/quick_start/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred"
  },
  {
    "provider": "deepseek",
    "model_id": "deepseek-v4-pro",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.87,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://api-docs.deepseek.com/quick_start/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "google",
    "model_id": "gemini-1.5-flash",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.075,
    "effective_from": "2024-08-12",
    "effective_to": null,
    "last_validated_at": "2024-10-01",
    "source_url": "https://web.archive.org/web/20241001092414/https://ai.google.dev/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20241001092414",
    "confidence": "archived",
    "notes": "Base tier (prompts <=128k tokens). A reduced price effective 2024-08-12 per the Google blog; >128k was 0.15/0.60."
  },
  {
    "provider": "google",
    "model_id": "gemini-1.5-flash",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.3,
    "effective_from": "2024-08-12",
    "effective_to": null,
    "last_validated_at": "2024-10-01",
    "source_url": "https://web.archive.org/web/20241001092414/https://ai.google.dev/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20241001092414",
    "confidence": "archived"
  },
  {
    "provider": "google",
    "model_id": "gemini-1.5-pro",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2024-10-01",
    "effective_to": null,
    "last_validated_at": "2024-10-01",
    "source_url": "https://web.archive.org/web/20241001092414/https://ai.google.dev/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20241001092414",
    "confidence": "archived",
    "notes": "Base tier (prompts <=128k). A cut effective 2024-10-01 from 3.50/10.50 (the capture states the old and new values); >128k was 2.50/10.00."
  },
  {
    "provider": "google",
    "model_id": "gemini-1.5-pro",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2024-10-01",
    "effective_to": null,
    "last_validated_at": "2024-10-01",
    "source_url": "https://web.archive.org/web/20241001092414/https://ai.google.dev/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20241001092414",
    "confidence": "archived"
  },
  {
    "provider": "google",
    "model_id": "gemini-2.0-flash",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.1,
    "effective_from": "2025-02-05",
    "effective_to": "2026-06-01",
    "last_validated_at": "2025-02-11",
    "source_url": "https://web.archive.org/web/20250211215432/https://ai.google.dev/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20250211215432",
    "confidence": "archived",
    "notes": "Flat tier (no 128k split). 0.10 = text/image/video input (audio input was 0.70). GA 2025-02-05; shut down 2026-06-01 per the live pricing page."
  },
  {
    "provider": "google",
    "model_id": "gemini-2.0-flash",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.4,
    "effective_from": "2025-02-05",
    "effective_to": "2026-06-01",
    "last_validated_at": "2025-02-11",
    "source_url": "https://web.archive.org/web/20250211215432/https://ai.google.dev/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20250211215432",
    "confidence": "archived"
  },
  {
    "provider": "google",
    "model_id": "gemini-2.5-flash",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.3,
    "effective_from": "2025-06-17",
    "effective_to": null,
    "last_validated_at": "2025-06-21",
    "source_url": "https://web.archive.org/web/20250621161929/https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20250621161929",
    "confidence": "archived",
    "notes": "0.30 = text/image/video input (audio input 1.00). GA 2025-06-17."
  },
  {
    "provider": "google",
    "model_id": "gemini-2.5-flash",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2025-06-17",
    "effective_to": null,
    "last_validated_at": "2025-06-21",
    "source_url": "https://web.archive.org/web/20250621161929/https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20250621161929",
    "confidence": "archived"
  },
  {
    "provider": "google",
    "model_id": "gemini-2.5-flash-lite",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.1,
    "effective_from": "2025-06-17",
    "effective_to": null,
    "last_validated_at": "2025-06-21",
    "source_url": "https://web.archive.org/web/20250621161929/https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20250621161929",
    "confidence": "archived",
    "notes": "0.10 = text/image/video input (audio 0.50). Introduced 2025-06-17."
  },
  {
    "provider": "google",
    "model_id": "gemini-2.5-flash-lite",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.4,
    "effective_from": "2025-06-17",
    "effective_to": null,
    "last_validated_at": "2025-06-21",
    "source_url": "https://web.archive.org/web/20250621161929/https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20250621161929",
    "confidence": "archived"
  },
  {
    "provider": "google",
    "model_id": "gemini-2.5-pro",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2025-06-17",
    "effective_to": null,
    "last_validated_at": "2025-06-21",
    "source_url": "https://web.archive.org/web/20250621161929/https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20250621161929",
    "confidence": "archived",
    "notes": "Base tier (prompts <=200k); >200k was 2.50/15.00. GA 2025-06-17."
  },
  {
    "provider": "google",
    "model_id": "gemini-2.5-pro",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2025-06-17",
    "effective_to": null,
    "last_validated_at": "2025-06-21",
    "source_url": "https://web.archive.org/web/20250621161929/https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20250621161929",
    "confidence": "archived"
  },
  {
    "provider": "google",
    "model_id": "gemini-3-flash-preview",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2025-12-17",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Gemini 3 Flash Preview. Flat text price (no context tiers). Date from the Gemini API changelog."
  },
  {
    "provider": "google",
    "model_id": "gemini-3-flash-preview",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 3,
    "effective_from": "2025-12-17",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "google",
    "model_id": "gemini-3.1-flash-lite",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.25,
    "effective_from": "2026-05-07",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Gemini 3.1 Flash-Lite (GA). Flat text price. Date from the Gemini API changelog."
  },
  {
    "provider": "google",
    "model_id": "gemini-3.1-flash-lite",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 1.5,
    "effective_from": "2026-05-07",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "google",
    "model_id": "gemini-3.1-pro-preview",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2,
    "effective_from": "2026-02-19",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Gemini 3.1 Pro Preview. Base tier (prompts <=200k tokens); the >200k tier is $4.00 input / $18.00 output. Date from the Gemini API changelog."
  },
  {
    "provider": "google",
    "model_id": "gemini-3.1-pro-preview",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 12,
    "effective_from": "2026-02-19",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "google",
    "model_id": "gemini-3.1-pro-preview",
    "variation": "tier2_input",
    "unit": "usd_per_mtok",
    "price_usd": 4,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "google",
    "model_id": "gemini-3.1-pro-preview",
    "variation": "tier2_output",
    "unit": "usd_per_mtok",
    "price_usd": 18,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "google",
    "model_id": "gemini-3.5-flash",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.5,
    "effective_from": "2026-05-19",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Gemini 3.5 Flash (GA). Flat text price; cached input is $0.15/Mtok (not recorded). Date from the Gemini API changelog (Google I/O 2026)."
  },
  {
    "provider": "google",
    "model_id": "gemini-3.5-flash",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 9,
    "effective_from": "2026-05-19",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "google",
    "model_id": "gemini-3.5-flash-lite",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.3,
    "effective_from": "2026-07-21",
    "effective_to": null,
    "last_validated_at": "2026-07-22",
    "source_url": "https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "google",
    "model_id": "gemini-3.5-flash-lite",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-07-21",
    "effective_to": null,
    "last_validated_at": "2026-07-22",
    "source_url": "https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "google",
    "model_id": "gemini-3.6-flash",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.5,
    "effective_from": "2026-07-21",
    "effective_to": null,
    "last_validated_at": "2026-07-22",
    "source_url": "https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "google",
    "model_id": "gemini-3.6-flash",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 7.5,
    "effective_from": "2026-07-21",
    "effective_to": null,
    "last_validated_at": "2026-07-22",
    "source_url": "https://ai.google.dev/gemini-api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "meta-llama",
    "model_id": "llama-3.1-405b",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 3.5,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://www.together.ai/pricing",
    "source_kind": "aggregator",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: no independent corroboration (new model, no OpenRouter match). No first-party Meta price; Together AI reference host."
  },
  {
    "provider": "meta-llama",
    "model_id": "llama-3.1-405b",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 3.5,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://www.together.ai/pricing",
    "source_kind": "aggregator",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: no independent corroboration (new model, no OpenRouter match). No first-party Meta price; Together AI reference host."
  },
  {
    "provider": "meta-llama",
    "model_id": "llama-3.1-8b",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.18,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://www.together.ai/models/llama-3-1-8b-instruct-turbo",
    "source_kind": "aggregator",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: no independent corroboration (new model, no OpenRouter match). No first-party Meta price; Together AI reference host."
  },
  {
    "provider": "meta-llama",
    "model_id": "llama-3.1-8b",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.18,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://www.together.ai/models/llama-3-1-8b-instruct-turbo",
    "source_kind": "aggregator",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: no independent corroboration (new model, no OpenRouter match). No first-party Meta price; Together AI reference host."
  },
  {
    "provider": "meta-llama",
    "model_id": "llama-3.3-70b",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.04,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://www.together.ai/models/llama-3-3-70b",
    "source_kind": "aggregator",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: no independent corroboration (new model, no OpenRouter match). No first-party Meta price; Together AI reference host."
  },
  {
    "provider": "meta-llama",
    "model_id": "llama-3.3-70b",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 1.04,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://www.together.ai/models/llama-3-3-70b",
    "source_kind": "aggregator",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: no independent corroboration (new model, no OpenRouter match). No first-party Meta price; Together AI reference host."
  },
  {
    "provider": "meta-llama",
    "model_id": "llama-4-maverick",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.27,
    "effective_from": "2025-04-05",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://www.together.ai/models/llama-4-maverick",
    "source_kind": "aggregator",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $0.27 is 1.8x OpenRouter's $0.15 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]). No first-party Meta price; Together AI reference host."
  },
  {
    "provider": "meta-llama",
    "model_id": "llama-4-maverick",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.85,
    "effective_from": "2025-04-05",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://www.together.ai/models/llama-4-maverick",
    "source_kind": "aggregator",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $0.27 is 1.8x OpenRouter's $0.15 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]). No first-party Meta price; Together AI reference host."
  },
  {
    "provider": "meta-llama",
    "model_id": "llama-4-scout",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.18,
    "effective_from": "2025-04-05",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://www.together.ai/models/llama-4-scout",
    "source_kind": "aggregator",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $0.18 is 1.8x OpenRouter's $0.1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $0.59 is 1.97x OpenRouter's $0.3 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]). No first-party Meta price; Together AI reference host."
  },
  {
    "provider": "meta-llama",
    "model_id": "llama-4-scout",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.59,
    "effective_from": "2025-04-05",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://www.together.ai/models/llama-4-scout",
    "source_kind": "aggregator",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $0.18 is 1.8x OpenRouter's $0.1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $0.59 is 1.97x OpenRouter's $0.3 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]). No first-party Meta price; Together AI reference host."
  },
  {
    "provider": "mistral",
    "model_id": "codestral-25.08",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.3,
    "effective_from": "2025-07-30",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Code model (Codestral 25.08). Price from live mistral.ai/pricing (USD). Date from mistral.ai/news/codestral-25-08 (2025-07-30)."
  },
  {
    "provider": "mistral",
    "model_id": "codestral-25.08",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.9,
    "effective_from": "2025-07-30",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "mistral",
    "model_id": "devstral-2",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.4,
    "effective_from": "2025-12-09",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Agentic code model. Price from live mistral.ai/pricing (USD). Date from mistral.ai/news/devstral-2-vibe-cli (2025-12-09)."
  },
  {
    "provider": "mistral",
    "model_id": "devstral-2",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 2,
    "effective_from": "2025-12-09",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "mistral",
    "model_id": "devstral-small-2",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.1,
    "effective_from": "2025-12-09",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Price from live mistral.ai/pricing (USD). Date from mistral.ai/news/devstral-2-vibe-cli (2025-12-09)."
  },
  {
    "provider": "mistral",
    "model_id": "devstral-small-2",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.3,
    "effective_from": "2025-12-09",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "mistral",
    "model_id": "magistral-medium",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2,
    "effective_from": "2025-06-10",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Reasoning model. Price from live mistral.ai/pricing (USD). Date is the original Magistral launch (mistral.ai/news/magistral, 2025-06-10); the live SKU reflects the later 1.2 lineage."
  },
  {
    "provider": "mistral",
    "model_id": "magistral-medium",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2025-06-10",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "mistral",
    "model_id": "magistral-small",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2025-06-10",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Reasoning model. Price from live mistral.ai/pricing (USD). Date = original Magistral launch (2025-06-10); live SKU reflects 1.2 lineage."
  },
  {
    "provider": "mistral",
    "model_id": "magistral-small",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 1.5,
    "effective_from": "2025-06-10",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "mistral",
    "model_id": "ministral-3-14b",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.2,
    "effective_from": "2025-12-02",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Ministral 3 family (14B). Flat input=output pricing as listed. Date from mistral.ai/news/mistral-3 (2025-12-02)."
  },
  {
    "provider": "mistral",
    "model_id": "ministral-3-14b",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.2,
    "effective_from": "2025-12-02",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "mistral",
    "model_id": "ministral-3-3b",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.1,
    "effective_from": "2025-12-02",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Ministral 3 family (3B). Flat input=output pricing as listed. Price from live mistral.ai/pricing (USD). Date from mistral.ai/news/mistral-3 (2025-12-02)."
  },
  {
    "provider": "mistral",
    "model_id": "ministral-3-3b",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.1,
    "effective_from": "2025-12-02",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "mistral",
    "model_id": "ministral-3-8b",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.15,
    "effective_from": "2025-12-02",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Ministral 3 family (8B). Flat input=output pricing as listed. Date from mistral.ai/news/mistral-3 (2025-12-02)."
  },
  {
    "provider": "mistral",
    "model_id": "ministral-3-8b",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.15,
    "effective_from": "2025-12-02",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "mistral",
    "model_id": "mistral-large-3",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2025-12-02",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Price from the live mistral.ai/pricing page (USD). Availability date from the first-party announcement mistral.ai/news/mistral-3 (2025-12-02)."
  },
  {
    "provider": "mistral",
    "model_id": "mistral-large-3",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 1.5,
    "effective_from": "2025-12-02",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "mistral",
    "model_id": "mistral-medium-3.5",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.5,
    "effective_from": "2026-04-29",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "Price from live mistral.ai/pricing (USD). Date inferred from the docs model-card slug date code 26-04; not first-party-date-confirmed."
  },
  {
    "provider": "mistral",
    "model_id": "mistral-medium-3.5",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.5,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://mistral.ai/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "mistral",
    "model_id": "mistral-medium-3.5",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 7.5,
    "effective_from": "2026-04-29",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred"
  },
  {
    "provider": "mistral",
    "model_id": "mistral-medium-3.5",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 7.5,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://mistral.ai/pricing/",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "mistral",
    "model_id": "mistral-small-4",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.1,
    "effective_from": "2026-03-16",
    "effective_to": "2026-06-24",
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Price from live mistral.ai/pricing (USD). Date from mistral.ai/news/mistral-small-4 (2026-03-16). Superseded: input raised to 0.15 on 2026-06-24."
  },
  {
    "provider": "mistral",
    "model_id": "mistral-small-4",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.15,
    "effective_from": "2026-06-24",
    "effective_to": null,
    "last_validated_at": "2026-06-24",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Mistral Small 4 (mistral-small-latest) input raised from 0.10 to 0.15. Confirmed on live mistral.ai/pricing 2026-06-24, corroborated by independent trackers (cloudzero, pricepertoken). Exact change date not published (prior price last validated 2026-06-15); effective_from set to the detection date."
  },
  {
    "provider": "mistral",
    "model_id": "mistral-small-4",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.3,
    "effective_from": "2026-03-16",
    "effective_to": "2026-06-24",
    "last_validated_at": "2026-06-15",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Superseded: output raised to 0.60 on 2026-06-24."
  },
  {
    "provider": "mistral",
    "model_id": "mistral-small-4",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.6,
    "effective_from": "2026-06-24",
    "effective_to": null,
    "last_validated_at": "2026-06-24",
    "source_url": "https://mistral.ai/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Mistral Small 4 (mistral-small-latest) output raised from 0.30 to 0.60. Confirmed on live mistral.ai/pricing 2026-06-24, corroborated by independent trackers (cloudzero, pricepertoken). Exact change date not published (prior price last validated 2026-06-15); effective_from set to the detection date."
  },
  {
    "provider": "openai",
    "model_id": "gpt-4",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 30,
    "effective_from": "2023-03-14",
    "effective_to": null,
    "last_validated_at": "2023-04-15",
    "source_url": "https://web.archive.org/web/20230415223802/https://openai.com/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20230415223802",
    "confidence": "archived",
    "notes": "GPT-4 8K launch price ($0.03/$0.06 per 1K). Standard tier. Scheduled for retirement 2026-10-23 (gpt-4-0613) per the OpenAI deprecations page; gpt-4-0314 retired 2026-03-26."
  },
  {
    "provider": "openai",
    "model_id": "gpt-4",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 60,
    "effective_from": "2023-03-14",
    "effective_to": null,
    "last_validated_at": "2023-04-15",
    "source_url": "https://web.archive.org/web/20230415223802/https://openai.com/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20230415223802",
    "confidence": "archived"
  },
  {
    "provider": "openai",
    "model_id": "gpt-4-turbo",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2023-11-06",
    "effective_to": null,
    "last_validated_at": "2023-11-10",
    "source_url": "https://web.archive.org/web/20231110022605/https://openai.com/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20231110022605",
    "confidence": "archived",
    "notes": "GPT-4 Turbo (gpt-4-1106-preview), 128K context, announced at DevDay 2023-11-06 at a lower price than GPT-4 ($0.01/$0.03 per 1K). Scheduled for retirement 2026-10-23."
  },
  {
    "provider": "openai",
    "model_id": "gpt-4-turbo",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 30,
    "effective_from": "2023-11-06",
    "effective_to": null,
    "last_validated_at": "2023-11-10",
    "source_url": "https://web.archive.org/web/20231110022605/https://openai.com/pricing",
    "source_kind": "wayback",
    "source_snapshot_ts": "20231110022605",
    "confidence": "archived"
  },
  {
    "provider": "openai",
    "model_id": "gpt-4.1",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-4.1",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2,
    "effective_from": "2025-04-14",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/models/gpt-4.1",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Standard tier. effective_from is the gpt-4.1-2025-04-14 snapshot date on the first-party model page."
  },
  {
    "provider": "openai",
    "model_id": "gpt-4.1",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 8,
    "effective_from": "2025-04-14",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/models/gpt-4.1",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-4o",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2024-05-13",
    "effective_to": "2024-08-06",
    "last_validated_at": "2024-05-24",
    "source_url": "https://web.archive.org/web/20240524210913/https://openai.com/pricing/",
    "source_kind": "wayback",
    "source_snapshot_ts": "20240524210913",
    "confidence": "archived",
    "notes": "GPT-4o launch price. Cut to 2.50/10 on 2024-08-06 (gpt-4o-2024-08-06)."
  },
  {
    "provider": "openai",
    "model_id": "gpt-4o",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2024-08-06",
    "effective_to": null,
    "last_validated_at": "2024-08-12",
    "source_url": "https://web.archive.org/web/20240812003130/https://openai.com/pricing/",
    "source_kind": "wayback",
    "source_snapshot_ts": "20240812003130",
    "confidence": "archived",
    "notes": "GPT-4o price reduction (gpt-4o-2024-08-06): 50% lower input, 33% lower output vs the launch price. The Aug 12 capture lists both the old (5/15) and new (2.50/10) prices."
  },
  {
    "provider": "openai",
    "model_id": "gpt-4o",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 15,
    "effective_from": "2024-05-13",
    "effective_to": "2024-08-06",
    "last_validated_at": "2024-05-24",
    "source_url": "https://web.archive.org/web/20240524210913/https://openai.com/pricing/",
    "source_kind": "wayback",
    "source_snapshot_ts": "20240524210913",
    "confidence": "archived"
  },
  {
    "provider": "openai",
    "model_id": "gpt-4o",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2024-08-06",
    "effective_to": null,
    "last_validated_at": "2024-08-12",
    "source_url": "https://web.archive.org/web/20240812003130/https://openai.com/pricing/",
    "source_kind": "wayback",
    "source_snapshot_ts": "20240812003130",
    "confidence": "archived"
  },
  {
    "provider": "openai",
    "model_id": "gpt-4o-mini",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.15,
    "effective_from": "2024-07-18",
    "effective_to": null,
    "last_validated_at": "2024-07-22",
    "source_url": "https://web.archive.org/web/20240722005830/https://openai.com/pricing/",
    "source_kind": "wayback",
    "source_snapshot_ts": "20240722005830",
    "confidence": "archived",
    "notes": "GPT-4o mini launch (gpt-4o-mini-2024-07-18), the low-cost tier."
  },
  {
    "provider": "openai",
    "model_id": "gpt-4o-mini",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 0.6,
    "effective_from": "2024-07-18",
    "effective_to": null,
    "last_validated_at": "2024-07-22",
    "source_url": "https://web.archive.org/web/20240722005830/https://openai.com/pricing/",
    "source_kind": "wayback",
    "source_snapshot_ts": "20240722005830",
    "confidence": "archived"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.125,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2025-08-07",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/models/gpt-5",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "Price from the live first-party model page; effective_from is the widely-reported GPT-5 launch date (2025-08-07), not confirmed on a fetched first-party page, so confidence is inferred."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2025-08-07",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/models/gpt-5",
    "source_kind": "provider_live",
    "confidence": "inferred"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.1",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.125,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.1",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2025-11-13",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "Now priced on the live page; effective date approximate."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.1",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.1",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2025-11-13",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.1",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.2",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.175,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.2",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.75,
    "effective_from": "2026-01-15",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "Now priced on the live page; effective date approximate."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.2",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.75,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.2",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 14,
    "effective_from": "2026-01-15",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.2",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 14,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.2-pro",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 21,
    "effective_from": "2026-01-15",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "Effective date approximate."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.2-pro",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 21,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.2-pro",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 168,
    "effective_from": "2026-01-15",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.2-pro",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 168,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.3-codex",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.75,
    "effective_from": "2026-07-10",
    "effective_to": null,
    "last_validated_at": "2026-07-10",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Codex-family coding model, Standard tier (Priority is 2x; cached input $0.175). effective_from is the first first-party validation date - OpenAI's pricing page does not state a launch date."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.3-codex",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 14,
    "effective_from": "2026-07-10",
    "effective_to": null,
    "last_validated_at": "2026-07-10",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.25,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-03-05",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Standard tier. Date from the OpenAI developers changelog."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 15,
    "effective_from": "2026-03-05",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4",
    "variation": "tier2_cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4",
    "variation": "tier2_input",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4",
    "variation": "tier2_output",
    "unit": "usd_per_mtok",
    "price_usd": 22.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4-mini",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.075,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4-mini",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.75,
    "effective_from": "2026-03-17",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Standard tier. Released 2026-03-17 per the changelog (day has minor uncertainty)."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4-mini",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 4.5,
    "effective_from": "2026-03-17",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4-nano",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.02,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4-nano",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.2,
    "effective_from": "2026-03-17",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Standard tier. Released with gpt-5.4-mini."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4-nano",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2026-03-17",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4-pro",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 30,
    "effective_from": "2026-03-05",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Standard tier. Released to the Responses API on 2026-03-05."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4-pro",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 180,
    "effective_from": "2026-03-05",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4-pro",
    "variation": "tier2_input",
    "unit": "usd_per_mtok",
    "price_usd": 60,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.4-pro",
    "variation": "tier2_output",
    "unit": "usd_per_mtok",
    "price_usd": 270,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.5",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.5",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2026-04-24",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Standard synchronous tier. Date = API availability from the OpenAI developers changelog."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.5",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 30,
    "effective_from": "2026-04-24",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.5",
    "variation": "tier2_cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 1,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.5",
    "variation": "tier2_input",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.5",
    "variation": "tier2_output",
    "unit": "usd_per_mtok",
    "price_usd": 45,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.5-pro",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 30,
    "effective_from": "2026-04-24",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Standard tier. Released alongside gpt-5.5."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.5-pro",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 180,
    "effective_from": "2026-04-24",
    "effective_to": null,
    "last_validated_at": "2026-06-15",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.5-pro",
    "variation": "tier2_input",
    "unit": "usd_per_mtok",
    "price_usd": 60,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.5-pro",
    "variation": "tier2_output",
    "unit": "usd_per_mtok",
    "price_usd": 270,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-luna",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.02,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $0.2 is 2x OpenRouter's $0.1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $1.2 is 2x OpenRouter's $0.6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-luna",
    "variation": "cache_write",
    "unit": "usd_per_mtok",
    "price_usd": 0.25,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $0.2 is 2x OpenRouter's $0.1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $1.2 is 2x OpenRouter's $0.6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-luna",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 0.2,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $0.2 is 2x OpenRouter's $0.1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $1.2 is 2x OpenRouter's $0.6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-luna",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 1.2,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $0.2 is 2x OpenRouter's $0.1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $1.2 is 2x OpenRouter's $0.6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-luna",
    "variation": "tier2_cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.04,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $0.2 is 2x OpenRouter's $0.1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $1.2 is 2x OpenRouter's $0.6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-luna",
    "variation": "tier2_cache_write",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $0.2 is 2x OpenRouter's $0.1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $1.2 is 2x OpenRouter's $0.6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-luna",
    "variation": "tier2_input",
    "unit": "usd_per_mtok",
    "price_usd": 0.4,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $0.2 is 2x OpenRouter's $0.1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $1.2 is 2x OpenRouter's $0.6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-luna",
    "variation": "tier2_output",
    "unit": "usd_per_mtok",
    "price_usd": 1.8,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $0.2 is 2x OpenRouter's $0.1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $1.2 is 2x OpenRouter's $0.6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-sol",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-sol",
    "variation": "cache_write",
    "unit": "usd_per_mtok",
    "price_usd": 6.25,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-sol",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-sol",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 30,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-sol",
    "variation": "tier2_cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 1,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-sol",
    "variation": "tier2_cache_write",
    "unit": "usd_per_mtok",
    "price_usd": 12.5,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-sol",
    "variation": "tier2_input",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-sol",
    "variation": "tier2_output",
    "unit": "usd_per_mtok",
    "price_usd": 45,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-terra",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.2,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $2 is 2x OpenRouter's $1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $12 is 2x OpenRouter's $6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-terra",
    "variation": "cache_write",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $2 is 2x OpenRouter's $1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $12 is 2x OpenRouter's $6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-terra",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $2 is 2x OpenRouter's $1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $12 is 2x OpenRouter's $6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-terra",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 12,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $2 is 2x OpenRouter's $1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $12 is 2x OpenRouter's $6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-terra",
    "variation": "tier2_cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.4,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $2 is 2x OpenRouter's $1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $12 is 2x OpenRouter's $6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-terra",
    "variation": "tier2_cache_write",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $2 is 2x OpenRouter's $1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $12 is 2x OpenRouter's $6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-terra",
    "variation": "tier2_input",
    "unit": "usd_per_mtok",
    "price_usd": 4,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $2 is 2x OpenRouter's $1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $12 is 2x OpenRouter's $6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "gpt-5.6-terra",
    "variation": "tier2_output",
    "unit": "usd_per_mtok",
    "price_usd": 18,
    "effective_from": "2026-07-09",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "[needs_review] cross-check flagged: input $2 is 2x OpenRouter's $1 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5]); output $12 is 2x OpenRouter's $6 - suspicious (reseller price should be >= first-party; expected ratio in [0.5, 1.5])."
  },
  {
    "provider": "openai",
    "model_id": "o1",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 7.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "o1",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 15,
    "effective_from": "2024-12-17",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o1",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 60,
    "effective_from": "2024-12-17",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o1-mini",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.55,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "o1-mini",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.1,
    "effective_from": "2024-09-12",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o1-mini",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 4.4,
    "effective_from": "2024-09-12",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o1-pro",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 150,
    "effective_from": "2025-03-19",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o1-pro",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 600,
    "effective_from": "2025-03-19",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o3",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "o3",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2025-04-16",
    "effective_to": "2025-06-10",
    "last_validated_at": "2026-06-17",
    "source_url": "https://openai.com/index/o3-o4-mini/",
    "source_kind": "changelog",
    "confidence": "archived",
    "notes": "o3 launch price; cut ~80% to $2/$8 on 2025-06-10 per OpenAI announcement."
  },
  {
    "provider": "openai",
    "model_id": "o3",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2,
    "effective_from": "2025-06-10",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o3",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 40,
    "effective_from": "2025-04-16",
    "effective_to": "2025-06-10",
    "last_validated_at": "2026-06-17",
    "source_url": "https://openai.com/index/o3-o4-mini/",
    "source_kind": "changelog",
    "confidence": "archived"
  },
  {
    "provider": "openai",
    "model_id": "o3",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 8,
    "effective_from": "2025-06-10",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o3-deep-research",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "o3-deep-research",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 10,
    "effective_from": "2025-06-26",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Standard (synchronous) tier."
  },
  {
    "provider": "openai",
    "model_id": "o3-deep-research",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 40,
    "effective_from": "2025-06-26",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o3-mini",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.55,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "o3-mini",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.1,
    "effective_from": "2025-01-31",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o3-mini",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 4.4,
    "effective_from": "2025-01-31",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o3-pro",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 20,
    "effective_from": "2025-06-10",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o3-pro",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 80,
    "effective_from": "2025-06-10",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o4-mini",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.275,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "o4-mini",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.1,
    "effective_from": "2025-04-16",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o4-mini",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 4.4,
    "effective_from": "2025-04-16",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "openai",
    "model_id": "o4-mini-deep-research",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "openai",
    "model_id": "o4-mini-deep-research",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2,
    "effective_from": "2025-06-26",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified",
    "notes": "Standard (synchronous) tier."
  },
  {
    "provider": "openai",
    "model_id": "o4-mini-deep-research",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 8,
    "effective_from": "2025-06-26",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://developers.openai.com/api/docs/pricing",
    "source_kind": "provider_live",
    "confidence": "verified"
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-0309-non-reasoning",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.2,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://docs.x.ai/docs/models",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "aliases": [
      "grok-4.20-non-reasoning",
      "grok-4.20-non-reasoning-latest",
      "grok-4.20-beta-non-reasoning",
      "grok-4.20-beta-latest-non-reasoning",
      "grok-4.20-experimental-beta-0304-non-reasoning",
      "grok-4.20-experimental-beta-non-reasoning-latest",
      "grok-4.20-beta-0309-non-reasoning",
      "grok-4.20-non-reasoning-gv2"
    ],
    "notes": "[needs_review] cross-check flagged: no independent corroboration (new model, no OpenRouter match)."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-0309-non-reasoning",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.2,
    "effective_from": "2026-06-29",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-non-reasoning",
      "grok-4.20-non-reasoning-latest",
      "grok-4.20-beta-non-reasoning",
      "grok-4.20-beta-latest-non-reasoning",
      "grok-4.20-experimental-beta-0304-non-reasoning",
      "grok-4.20-experimental-beta-non-reasoning-latest",
      "grok-4.20-beta-0309-non-reasoning",
      "grok-4.20-non-reasoning-gv2"
    ],
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-0309-non-reasoning",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://docs.x.ai/docs/models",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "aliases": [
      "grok-4.20-non-reasoning",
      "grok-4.20-non-reasoning-latest",
      "grok-4.20-beta-non-reasoning",
      "grok-4.20-beta-latest-non-reasoning",
      "grok-4.20-experimental-beta-0304-non-reasoning",
      "grok-4.20-experimental-beta-non-reasoning-latest",
      "grok-4.20-beta-0309-non-reasoning",
      "grok-4.20-non-reasoning-gv2"
    ],
    "notes": "[needs_review] cross-check flagged: no independent corroboration (new model, no OpenRouter match)."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-0309-non-reasoning",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2026-06-29",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-non-reasoning",
      "grok-4.20-non-reasoning-latest",
      "grok-4.20-beta-non-reasoning",
      "grok-4.20-beta-latest-non-reasoning",
      "grok-4.20-experimental-beta-0304-non-reasoning",
      "grok-4.20-experimental-beta-non-reasoning-latest",
      "grok-4.20-beta-0309-non-reasoning",
      "grok-4.20-non-reasoning-gv2"
    ],
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-0309-non-reasoning",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-06-22",
    "source_url": "https://docs.x.ai/docs/models",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "aliases": [
      "grok-4.20-non-reasoning",
      "grok-4.20-non-reasoning-latest",
      "grok-4.20-beta-non-reasoning",
      "grok-4.20-beta-latest-non-reasoning",
      "grok-4.20-experimental-beta-0304-non-reasoning",
      "grok-4.20-experimental-beta-non-reasoning-latest",
      "grok-4.20-beta-0309-non-reasoning",
      "grok-4.20-non-reasoning-gv2"
    ],
    "notes": "[needs_review] cross-check flagged: no independent corroboration (new model, no OpenRouter match)."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-0309-non-reasoning",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-06-29",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-non-reasoning",
      "grok-4.20-non-reasoning-latest",
      "grok-4.20-beta-non-reasoning",
      "grok-4.20-beta-latest-non-reasoning",
      "grok-4.20-experimental-beta-0304-non-reasoning",
      "grok-4.20-experimental-beta-non-reasoning-latest",
      "grok-4.20-beta-0309-non-reasoning",
      "grok-4.20-non-reasoning-gv2"
    ],
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-0309-non-reasoning",
    "variation": "tier2_input",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-non-reasoning",
      "grok-4.20-non-reasoning-latest",
      "grok-4.20-beta-non-reasoning",
      "grok-4.20-beta-latest-non-reasoning",
      "grok-4.20-experimental-beta-0304-non-reasoning",
      "grok-4.20-experimental-beta-non-reasoning-latest",
      "grok-4.20-beta-0309-non-reasoning",
      "grok-4.20-non-reasoning-gv2"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-0309-non-reasoning",
    "variation": "tier2_output",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-non-reasoning",
      "grok-4.20-non-reasoning-latest",
      "grok-4.20-beta-non-reasoning",
      "grok-4.20-beta-latest-non-reasoning",
      "grok-4.20-experimental-beta-0304-non-reasoning",
      "grok-4.20-experimental-beta-non-reasoning-latest",
      "grok-4.20-beta-0309-non-reasoning",
      "grok-4.20-non-reasoning-gv2"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-0309-reasoning",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.2,
    "effective_from": "2026-07-27",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-reasoning-latest",
      "grok-4.20",
      "grok-4.20-reasoning",
      "grok-4.20-0309",
      "grok-4.20-beta-0309-reasoning",
      "grok-4.20-beta",
      "grok-4.20-beta-0309",
      "grok-4.20-beta-latest",
      "grok-4.20-beta-latest-reasoning",
      "grok-4.20-beta-reasoning",
      "grok-4.20-experimental-beta-0304-reasoning",
      "grok-4.20-experimental-beta-0304",
      "grok-4.20-experimental-beta-reasoning-latest",
      "grok-4.20-experimental-beta-latest",
      "grok-4.20-reasoning-gv2"
    ],
    "notes": "Cache-read rate, confirmed first-party on the xAI models page 2026-07-27 during a full re-validation; this model carried input/output rows but no cache row. effective_from is the observation date, NOT a known change date: no dated first-party evidence puts a start on it (xAI publishes no price history, and Wayback captures of this page do not archive its embedded price payload). The $0.20 rate is probably older than this record."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-0309-reasoning",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2026-03-09",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models/grok-4.20-0309-reasoning",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-reasoning-latest",
      "grok-4.20",
      "grok-4.20-reasoning",
      "grok-4.20-0309",
      "grok-4.20-beta-0309-reasoning",
      "grok-4.20-beta",
      "grok-4.20-beta-0309",
      "grok-4.20-beta-latest",
      "grok-4.20-beta-latest-reasoning",
      "grok-4.20-beta-reasoning",
      "grok-4.20-experimental-beta-0304-reasoning",
      "grok-4.20-experimental-beta-0304",
      "grok-4.20-experimental-beta-reasoning-latest",
      "grok-4.20-experimental-beta-latest",
      "grok-4.20-reasoning-gv2"
    ],
    "notes": "Grok 4.20 reasoning variant. Price + current lineup confirmed first-party on the x.ai pricing page (2026-06-17); date from the -0309 build slug (2026-03-09). The 4.20 non-reasoning and multi-agent variants carry the same $1.25/$2.50 and are recorded separately. (LiteLLM lists $2/$6 for this model, which is wrong; the aggregator-accuracy ledger tracks that disagreement.)"
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-0309-reasoning",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-03-09",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models/grok-4.20-0309-reasoning",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-reasoning-latest",
      "grok-4.20",
      "grok-4.20-reasoning",
      "grok-4.20-0309",
      "grok-4.20-beta-0309-reasoning",
      "grok-4.20-beta",
      "grok-4.20-beta-0309",
      "grok-4.20-beta-latest",
      "grok-4.20-beta-latest-reasoning",
      "grok-4.20-beta-reasoning",
      "grok-4.20-experimental-beta-0304-reasoning",
      "grok-4.20-experimental-beta-0304",
      "grok-4.20-experimental-beta-reasoning-latest",
      "grok-4.20-experimental-beta-latest",
      "grok-4.20-reasoning-gv2"
    ]
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-0309-reasoning",
    "variation": "tier2_input",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-reasoning-latest",
      "grok-4.20",
      "grok-4.20-reasoning",
      "grok-4.20-0309",
      "grok-4.20-beta-0309-reasoning",
      "grok-4.20-beta",
      "grok-4.20-beta-0309",
      "grok-4.20-beta-latest",
      "grok-4.20-beta-latest-reasoning",
      "grok-4.20-beta-reasoning",
      "grok-4.20-experimental-beta-0304-reasoning",
      "grok-4.20-experimental-beta-0304",
      "grok-4.20-experimental-beta-reasoning-latest",
      "grok-4.20-experimental-beta-latest",
      "grok-4.20-reasoning-gv2"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-0309-reasoning",
    "variation": "tier2_output",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-reasoning-latest",
      "grok-4.20",
      "grok-4.20-reasoning",
      "grok-4.20-0309",
      "grok-4.20-beta-0309-reasoning",
      "grok-4.20-beta",
      "grok-4.20-beta-0309",
      "grok-4.20-beta-latest",
      "grok-4.20-beta-latest-reasoning",
      "grok-4.20-beta-reasoning",
      "grok-4.20-experimental-beta-0304-reasoning",
      "grok-4.20-experimental-beta-0304",
      "grok-4.20-experimental-beta-reasoning-latest",
      "grok-4.20-experimental-beta-latest",
      "grok-4.20-reasoning-gv2"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-multi-agent-0309",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.2,
    "effective_from": "2026-03-31",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-multi-agent",
      "grok-4.20-multi-agent-latest",
      "grok-4.20-multi-agent-beta-latest",
      "grok-4.20-multi-agent-experimental-beta-0304",
      "grok-4.20-multi-agent-experimental-beta-latest",
      "grok-4.20-multi-agent-beta-0309"
    ]
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-multi-agent-0309",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2026-03-31",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-multi-agent",
      "grok-4.20-multi-agent-latest",
      "grok-4.20-multi-agent-beta-latest",
      "grok-4.20-multi-agent-experimental-beta-0304",
      "grok-4.20-multi-agent-experimental-beta-latest",
      "grok-4.20-multi-agent-beta-0309"
    ]
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-multi-agent-0309",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-03-31",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-multi-agent",
      "grok-4.20-multi-agent-latest",
      "grok-4.20-multi-agent-beta-latest",
      "grok-4.20-multi-agent-experimental-beta-0304",
      "grok-4.20-multi-agent-experimental-beta-latest",
      "grok-4.20-multi-agent-beta-0309"
    ]
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-multi-agent-0309",
    "variation": "tier2_input",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-multi-agent",
      "grok-4.20-multi-agent-latest",
      "grok-4.20-multi-agent-beta-latest",
      "grok-4.20-multi-agent-experimental-beta-0304",
      "grok-4.20-multi-agent-experimental-beta-latest",
      "grok-4.20-multi-agent-beta-0309"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.20-multi-agent-0309",
    "variation": "tier2_output",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.20-multi-agent",
      "grok-4.20-multi-agent-latest",
      "grok-4.20-multi-agent-beta-latest",
      "grok-4.20-multi-agent-experimental-beta-0304",
      "grok-4.20-multi-agent-experimental-beta-latest",
      "grok-4.20-multi-agent-beta-0309"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.3",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.2,
    "effective_from": "2026-06-17",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.3-latest",
      "grok-latest"
    ],
    "notes": "Cache-read rate. effective_from is the earliest date we have first-party evidence for it: the 2026-06-17 validation of this model observed \"$0.20/Mtok cached input\" and said so in the input row's note, but never wrote the row. Re-confirmed on the xAI models page 2026-07-27 and recorded here. NOT a known change date; the rate may be older. xAI publishes no dated price history and Wayback captures of this page do not archive its embedded price payload, so no earlier evidence exists."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.3",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1.25,
    "effective_from": "2026-05-05",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models/grok-4.3",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.3-latest",
      "grok-latest"
    ],
    "notes": "Flagship, 1M context. Price from docs.x.ai. Cached input is $0.20/Mtok (recorded separately since 2026-07-27). Date from xAI's \"Grok 4.3 is now live on the xAI API\" post (2026-05-05)."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.3",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-05-05",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models/grok-4.3",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.3-latest",
      "grok-latest"
    ]
  },
  {
    "provider": "xai",
    "model_id": "grok-4.3",
    "variation": "tier2_input",
    "unit": "usd_per_mtok",
    "price_usd": 2.5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.3-latest",
      "grok-latest"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.3",
    "variation": "tier2_output",
    "unit": "usd_per_mtok",
    "price_usd": 5,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.3-latest",
      "grok-latest"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.5",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.5,
    "effective_from": "2026-07-08",
    "effective_to": "2026-07-19",
    "last_validated_at": "2026-07-09",
    "source_url": "https://docs.x.ai/docs/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.5-latest",
      "grok-build-latest"
    ]
  },
  {
    "provider": "xai",
    "model_id": "grok-4.5",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.3,
    "effective_from": "2026-07-19",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.5-latest",
      "grok-build-latest"
    ],
    "notes": "Cache-read cut from $0.50 to $0.30/Mtok (standard <200k tier); input/output unchanged at $2/$6. First-party confirmed on docs.x.ai. Supersedes the 2026-07-08 launch cache_read record; effective_from is the first date the $0.30 rate was observed on the provider page (price-sentinel provider_live read)."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.5",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 2,
    "effective_from": "2026-07-08",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.5-latest",
      "grok-build-latest"
    ]
  },
  {
    "provider": "xai",
    "model_id": "grok-4.5",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 6,
    "effective_from": "2026-07-08",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.5-latest",
      "grok-build-latest"
    ]
  },
  {
    "provider": "xai",
    "model_id": "grok-4.5",
    "variation": "tier2_input",
    "unit": "usd_per_mtok",
    "price_usd": 4,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.5-latest",
      "grok-build-latest"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "xai",
    "model_id": "grok-4.5",
    "variation": "tier2_output",
    "unit": "usd_per_mtok",
    "price_usd": 12,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-4.5-latest",
      "grok-build-latest"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "xai",
    "model_id": "grok-build-0.1",
    "variation": "cache_read",
    "unit": "usd_per_mtok",
    "price_usd": 0.2,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-code-fast-1",
      "grok-code-fast",
      "grok-code-fast-1-0825"
    ],
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "xai",
    "model_id": "grok-build-0.1",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1,
    "effective_from": "2026-06-01",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://docs.x.ai/docs/models/grok-build-0.1",
    "source_kind": "provider_live",
    "confidence": "inferred",
    "notes": "Coding model, early access, 256k context. Price from docs.x.ai. Date inferred from the June 2026 release notes."
  },
  {
    "provider": "xai",
    "model_id": "grok-build-0.1",
    "variation": "input",
    "unit": "usd_per_mtok",
    "price_usd": 1,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-code-fast-1",
      "grok-code-fast",
      "grok-code-fast-1-0825"
    ],
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "xai",
    "model_id": "grok-build-0.1",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 2,
    "effective_from": "2026-06-01",
    "effective_to": null,
    "last_validated_at": "2026-06-17",
    "source_url": "https://docs.x.ai/docs/models/grok-build-0.1",
    "source_kind": "provider_live",
    "confidence": "inferred"
  },
  {
    "provider": "xai",
    "model_id": "grok-build-0.1",
    "variation": "output",
    "unit": "usd_per_mtok",
    "price_usd": 2,
    "effective_from": "2026-06-22",
    "effective_to": null,
    "last_validated_at": "2026-07-27",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-code-fast-1",
      "grok-code-fast",
      "grok-code-fast-1-0825"
    ],
    "notes": "[provenance upgrade] first-party collector confirmed the published price; supersedes the prior inferred/provider_live record."
  },
  {
    "provider": "xai",
    "model_id": "grok-build-0.1",
    "variation": "tier2_input",
    "unit": "usd_per_mtok",
    "price_usd": 2,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-code-fast-1",
      "grok-code-fast",
      "grok-code-fast-1-0825"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  },
  {
    "provider": "xai",
    "model_id": "grok-build-0.1",
    "variation": "tier2_output",
    "unit": "usd_per_mtok",
    "price_usd": 4,
    "effective_from": "2026-07-31",
    "effective_to": null,
    "last_validated_at": "2026-07-31",
    "source_url": "https://docs.x.ai/developers/models",
    "source_kind": "provider_live",
    "confidence": "verified",
    "aliases": [
      "grok-code-fast-1",
      "grok-code-fast",
      "grok-code-fast-1-0825"
    ],
    "notes": "[missing variation] Added by the sentinel's missing-variation pass: the provider publishes this rate alongside the input/output prices we already track, but we carried no row for it. effective_from is the OBSERVATION date, NOT a known change date - the rate is very likely older, and no dated first-party evidence exists for an earlier start."
  }
]