Voice Scribe Russian Dictation Corrector (Qwen3.5-0.8B, V15 R-3, cuda-int8-bnb)

Premium ship-form: bitsandbytes 8-bit (LLM.int8) quantization. ~981 MB. ZERO observed quality loss vs bf16 (96.55% identical). Target: RTX 30xx+/8GB+.

Eval results (held-out wild_eval, 58 prompts 脳 9 sectors)

Metric Score
Wild pass 96.55%
Hard-negative 5/5
Smoke 7/8
p50 latency 1738 ms
Ship-form size 981 MB

Comparison:

  • macOS V15 R-3 reference: 93.1% wild
  • V14 baseline: 86.2%
  • Qwen3-4B Q5 production (pre-LoRA): 48%
  • This model: 96.55% (+10.3pp vs V14 baseline)

Training recipe (V15 R-3)

Mirrors macOS configs/r4_v15_extended.yaml byte-for-byte logical-recipe.

base               = Qwen/Qwen3.5-0.8B (vanilla, NOT Instruct)
LoRA rank          = 16
LoRA alpha         = 80 (rsLoRA mode -> effective scale 20.0)
target_modules     = q_proj, k_proj, v_proj, o_proj
layers_to_transform = last 16 of 24 (range(8, 24))
mask_prompt        = ON (assistant_masks via patched chat_template {% generation %})
max_steps          = 1100
batch_size         = 2
max_seq_length     = 384
lr_schedule        = cosine, peak 3e-5, warmup 100
weight_decay       = 0.01
optim              = adamw_torch_fused
precision          = bf16
seed               = 20260515
trainable params   = 720,896 (0.0957% of 753M)
data               = 1104 rows = V14 seeds (691) + V15 brand expansion (271) + V15 R-3 patches (142)

Intended use

  • Russian dictation cleanup after ASR (GigaAM, Whisper, Parakeet)
  • Conservative editing policy: remove filler (褝屑/薪褍/褌懈锌邪/泻芯褉芯褔械), normalize Cyrillic IT terms (谐懈褌褏邪斜 -> GitHub), preserve all meaning
  • NOT for general text editing, English text, creative writing, summarization, translation

Limitations

  • 58-row eval set has 卤1.72pp single-row noise
  • Cyrillic <-> Latin choice on ambiguous brand spellings is judgment call (model may differ from expected byte-match)
  • Trained on synthetic data only; real production telemetry collection planned for V16
  • INT8 latency on RTX 50xx Blackwell is sub-optimal (bnb LLM.int8 kernels)

Hardware ship matrix

Hardware Recommended ship-form This model?
RTX 5090 / 4090 24GB+ bf16
RTX 4070 / 4060 / 3060 8-16GB INT8 PRIMARY
RTX 2060 / 3050 / 4060 6-8GB INT4 NF4
Re-training / stacking adapter

Inference

from transformers import AutoModelForCausalLM, AutoTokenizer
import torch

model = AutoModelForCausalLM.from_pretrained(
    "VoiceScribe/qwen3-5-0.8b-dictation-corrector-cuda-int8",
    load_in_8bit=True,
    device_map="cuda",
    trust_remote_code=True,
)
tokenizer = AutoTokenizer.from_pretrained("VoiceScribe/qwen3-5-0.8b-dictation-corrector-cuda-int8", trust_remote_code=True)

messages = [
    {"role": "system", "content": "袣芯褉褉械泻褌芯褉 褉褍褋褋泻芯泄 写懈泻褌芯胁泻懈. 校斜械褉懈 褋谢芯胁邪-锌邪褉邪蟹懈褌褘 ..."},
    {"role": "user", "content": "袟邪锌褍褕懈谢 泻芯屑屑懈褌 胁 谐懈褌褏邪斜 褉械锌芯蟹懈褌芯褉懈泄"},
]
prompt = tokenizer.apply_chat_template(
    messages,
    add_generation_prompt=True,
    tokenize=False,
    enable_thinking=False,  # CRITICAL for Qwen3.5
)
inputs = tokenizer(prompt, return_tensors="pt").to("cuda")
out = model.generate(**inputs, max_new_tokens=200, do_sample=False)
print(tokenizer.decode(out[0, inputs["input_ids"].shape[1]:], skip_special_tokens=True))
# Expected: "袟邪锌褍褕懈谢 泻芯屑屑懈褌 胁 GitHub 褉械锌芯蟹懈褌芯褉懈泄"

Cross-platform variants

  • macOS MLX: VoiceScribe/qwen3-5-0.8b-dictation-corrector-mlx-{bf16,8bit,4bit} (V15 R-3, 93.1% wild)
  • CUDA bf16/INT8/INT4-NF4: this family (V15 R-3 Win port, 84.48-96.55% wild)
  • OpenVINO: planned (separate venv for export; tracker WP#920)
  • TensorRT-RTX W4A16: deferred (DeltaNet ONNX export blocked on Win-Py3.13-cu128 in 2026-05)

Citation

@software{voicescribe-corrector-v15r3-2026,
  title = {Voice Scribe Russian Dictation Corrector (Qwen3.5-0.8B V15 R-3, CUDA Win port)},
  author = {Sabynin, Andrey},
  year = {2026},
  url = {https://huggingface.co/VoiceScribe/qwen3-5-0.8b-dictation-corrector-cuda-int8}
}

Trackers

  • macOS R&D: OpenProject WP#917 (V14), WP#919 (V15 R-3 macOS)
  • Windows port: OpenProject WP#920 (this effort, achieved 96.55% vs macOS 93.1%)
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