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metadata
license: gemma
base_model: google/gemma-4-26b-it
tags:
  - gemma4
  - transformers
  - bf16
  - multimodal
  - instruction-following
  - tool-use
language:
  - en
  - ko
pipeline_tag: text-generation
library_name: transformers

SuperGemma4-26b-abliterated-multimodal

BF16 Gemma 4 multimodal release with an April 18 stability refresh focused on truthfulness, exact JSON/tool-call formatting, long-context extraction, loop resistance, and cleaner prompt hygiene.

April 18 Stability Refresh

  • Synced the external chat_template.jinja and inline tokenizer_config.json template so local and hosted runtimes read the same prompt rules.
  • Hardened false-premise handling so the model corrects bad assumptions instead of continuing under them.
  • Tightened JSON-only and tool-call formatting so exact-key JSON and execute_code calls stay machine-parseable.
  • Improved long-context sentinel extraction behavior for retrieval-style prompts.
  • Reinforced identity and prompt-hygiene responses to avoid mixed-script glitches and hidden-tag leakage.

Validation Snapshot

  • Capability audit: 9 / 9 passed, 100.0%
  • Reliability audit: 20 / 20 passed, 100.0%
  • Server red-team: 10 / 13 passed on the local MLX OpenAI-compatible server
  • Remaining server misses were 2 semantic checker mismatches on safe refusals and 1 text-only multimodal rejection mismatch, not a truthfulness or leak regression.

Included Files

  • Official Hugging Face-format BF16 weights
  • chat_template.jinja
  • tool_chat_template.jinja for Gemma 4 tool-calling setups
  • SERVING_NOTES.md with Gemma 4 runtime notes for vLLM, SGLang, and MLX
  • BENCHMARK_SNAPSHOT.md with the current validation summary

Notes

  • Checkpoint keys were aligned to the official Gemma 4 Hugging Face naming/layout for portable serving.
  • tokenizer_config.json includes an inline chat_template for portability and should match chat_template.jinja.
  • For multi-turn tool use on vLLM, use the dedicated tool_chat_template.jinja and Gemma 4 parser settings from SERVING_NOTES.md.