gemma-4-12B-Styletune-Voice

<p align="center"><strong>The StyleTune voice for Gemma 4 12B — as a download.</strong></p>

Gemma-4-12B-StyleTune-Voice

56% fewer clichés. 16.8% shared vocabulary. One tensor. ~2.0 GB.

This is not a model. It is the voice of Gryphe/Gemma-4-12B-StyleTune, extracted into a single portable tensor. Pair it with the Voice tool and any Gemma 4 12B GGUF you already have becomes StyleTune-voiced — reasoning, knowledge, and instruction following untouched.

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Why this exists

A full StyleTune finetune is 24 GB. The voice is 2.0 GB — and it carries the entire style. The style lives in one tensor: the lm_head output projection, the last stop before text appears. Gryphe trained only that tensor; we lift only that tensor.

Download the voice, not the model.

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Two steps

# 1. Get the voice tool (one-time): https://huggingface.co/Wiself/voice
python3 voice.py path   # optional, puts `voice` on your PATH

# 2. Cast it onto any Gemma 4 12B GGUF you already have
voice cast ./gemma-4-12b-it-Q4_K_M.gguf voice.safetensors --out ./voiced/gemma-4-12b-styletune.gguf

Append --speak to force the voice through output.weight (invented if the target lacks it and geometry survives; GGUF only).

Run it:

llama serve -m ./voiced/gemma-4-12b-styletune.gguf --jinja

That's it. One file out, nothing extra at runtime. No adapter, no LoRA, no second model.

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The numbers

From Gryphe's own benchmarks (source card) — 200 diverse roleplay prompts, greedy 0.0, versus the base instruct:

Everything that makes StyleTune StyleTune is in this file. What does not change: reasoning, world knowledge, instruction following, multilingual capability — none of it lives in lm_head.

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What's inside

• voice.safetensors — the lm_head.weight tensor, BF16, shape [262144, 3840], ~2.0 GB
• voice.json — metadata: source, dtype, shape, architecture

Bit-for-bit identical to the tensor that makes Gryphe/Gemma-4-12B-StyleTune sound the way it does. If you have the original model, you don't need this file. If you have any other Gemma 4 12B — a quant, an abliterated variant, a different finetune — this voice drops in.

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Compatibility

The cast checks shape before touching anything and tells you plainly if it won't fit.

<details> <summary><strong>Loops on abliterated targets?</strong></summary>

On some abliterated targets a direct cast can loop. The fix is the delta variant — it carries only the difference from the base instruct, so MoE routing stays calm:

voice delta voice.safetensors          # needs the base: --base google/gemma-4-12b-it
voice cast ./model.gguf delta-voice.safetensors --out ./voiced/model.gguf

This is the exact path that fixed looping on the 26B QAT abliterated model — see the Voice tool card for that story.

</details>

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Notes

• Quality: the voice is stored at the original BF16 precision. Casting to GGUF quantizes only the head to Q8_0 (≈¼ size, near-lossless); every other tensor is byte-copied from your model.
• Casting to safetensors targets works too — the head is replaced at the target's own dtype, no quantization.
• Sampler tips from Gryphe: temp 1.0, MinP 0.10, DRY sampler on. Gemma 4's native chat template applies automatically.
• Verify after download: voice info voice.safetensors → should read lm_head.weight · [262144, 3840] · BF16.

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Credits

Gryphe trained the StyleTune and proved one tensor changes everything. The Voice tool lifts and casts it. Gemma 4 is Google's model, under its own terms — this voice carries the source model's license lineage; check the source card before sharing voiced models.