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Gemma 4 31B MXFP4 CRACK

Abliterated Gemma 4 31B — Vision, reasoning, multilingual

95% HarmBench harm-category compliance with -5.7% MMLU change. Refusal removed, capability preserved.

Model Details

Metric Value
Source google/gemma-4-31b-it
Architecture Dense (60 layers) + Hybrid Sliding/Global Attention
Quantization MXFP4 (4-bit)
Model size 18 GB
Parameters 31B dense
Vision Yes (multimodal, float16 passthrough)
Audio No
Reasoning Yes (channel-based thinking)
Format MLX-native safetensors (instant load)
Abliteration CRACK (refusal removal)

Benchmarks

comparison

MMLU (knowledge retention)

Measured in the served (generation) setting — the model reasons before answering, as in deployment.

Base CRACK Δ
MMLU 88.6% 82.9% -5.7%

HarmBench (refusal removal)

Harm-category compliance: 57/60 = 95% (10 per category) — base model refuses (~0%).

Category Compliance
Illegal activities 9/10 (90%)
Chemical / biological 10/10 (100%)
Cybercrime / intrusion 10/10 (100%)
Misinformation 10/10 (100%)
Harassment / bullying 9/10 (90%)
Harmful content 9/10 (90%)

Copyright-reproduction prompts are excluded (not a refusal behavior).

Coherence & capability ✅

  • Factual QA, multi-step reasoning, and working code generation verified
  • Vision inputs preserved · no loops, no truncation

Other Quantizations

Also available: Gemma 4 31B JANG_4M CRACK — same family, different precision/size trade-off.

Usage

Requires vMLX (bundled Gemma 4 support). Standard mlx_lm / mlx_vlm do not fully support Gemma 4.

# Load in the vMLX app or via its API
from vmlx_engine.models.mllm import MLXMultimodalLM
m = MLXMultimodalLM("<this-repo>")
print(m.chat([{"role":"user","content":"..."}]).text)

Requirements

  • Apple Silicon Mac with sufficient unified memory
  • vMLX with Gemma 4 support

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About dealignai

Dealign.AI

We research and publish abliterated models to advance AI safety understanding.

See our research: Safety Generalization in Frontier Models


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