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Gemma 4 26B-A4B MXFP4 CRACK

Abliterated Gemma 4 26B-A4B — Vision, reasoning, multilingual

97% HarmBench harm-category compliance with -4.8% MMLU change. Refusal removed, capability preserved.

Model Details

Metric Value
Source google/gemma-4-26b-a4b-it
Architecture MoE (128 experts, top-8 active) + parallel shared dense MLP + Hybrid Attention
Quantization MXFP4 (4-bit)
Model size 15 GB
Parameters 26B (4B active/token)
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 83.3% 78.5% -4.8%

HarmBench (refusal removal)

Harm-category compliance: 58/60 = 97% (10 per category) — base model refuses (~0%).

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

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 26B-A4B 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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