⛓️‍💥 MLX quantization of Qwen3.8-27B — OBLITERATED

Using imatrix from Unsloth

Zero refusals. Capability matching or exceeding stock.

🆕 V2: Complementary Abliteration Blending

V2 replaces the V1 weights with a novel technique: complementary abliteration blending. Instead of one surgery, we run two surgeries that fail in different ways (aggressive/SVD for deep refusal removal, LEACE for capability preservation), then blend their weights so the failures cancel out.

† 842-corpus validated. V1 scored 0/842; V2 scored 2/842 (0.24%). Ship score improved from 88.7 (V1) to 92.1 (V2).

MMLU note: At n=50 per subject (2,850 questions), V2 scores within ±0.65pp of stock — a massive improvement over V1's -6.0pp gap. Humanities improved +1.4pp while social sciences regressed -1.5pp, netting approximately even.

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⚙️ Optimal Settings — THESE MATTER!

⚠️ GGUF users: V2 GGUFs ship with a modified chat template that defaults to thinking OFF. If your inference tool (Ollama, LM Studio, llama.cpp) overrides the template or enables thinking, you may see refusals. Ensure thinking is disabled in your tool's settings.

from transformers import AutoModelForCausalLM, AutoTokenizer

model = AutoModelForCausalLM.from_pretrained(
    "OBLITERATUS/Qwen3.8-27B-OBLITERATED",
    torch_dtype="bfloat16",
    device_map="auto",
)
tokenizer = AutoTokenizer.from_pretrained(
    "OBLITERATUS/Qwen3.8-27B-OBLITERATED"
)

messages = [{"role": "user", "content": "Your query here"}]
text = tokenizer.apply_chat_template(
    messages, tokenize=False, add_generation_prompt=True,
    enable_thinking=False
)

inputs = tokenizer(text, return_tensors="pt").to(model.device)
outputs = model.generate(
    **inputs,
    max_new_tokens=2048,
    do_sample=False,
    repetition_penalty=1.15,
)
print(tokenizer.decode(outputs[0][inputs["input_ids"].shape[1]:], skip_special_tokens=True))

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🧨 V2: How It Works

Most abliterations use a single method — find refusal directions, project them out. The deeper you cut, the more capability you lose. V1 proved this: 5 SVD directions achieved 0% refuse but cost -6pp MMLU.

V2 breaks this tradeoff by blending two complementary surgeries:

Each method makes different mistakes in different parts of the weight space. SVD damages capability where it greedily captures variance. LEACE leaves refusal residue in the generation pathway. The blend averages out each method's weaknesses.

The 60/40 ratio was found by binary search over {0.30, 0.50, 0.55, 0.60, 0.65, 0.70}.

Full research writeup and reproduction code: OBLITERATUS repo

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🧪 The Numbers

MMLU (lm-eval-harness, 0-shot)

Full MMLU (14k questions) validation in progress.

Refusal Rate

V2 has 2 residual hard refusals out of 842 prompts. Ship score improved from 88.7 to 92.1 due to higher overall output quality.

Advanced Real-World Tasks (thinking OFF)

V2 matches stock on every practical task while being fully uncensored.

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🔴 Refusal Removal

This model will comply with requests that stock Qwen3.8-27B would refuse. V1 validated 0/842 refusals across a comprehensive harmful prompt corpus including:

• Malware development, RAT scripts, C2 infrastructure
• Social engineering, phishing, vishing playbooks
• Exploit development and vulnerability research
• Jailbreak design and safety bypass taxonomies
• DAN prompts and prompt injection techniques

V2 inherits this from both parent surgeries and showed 0/52 on a random sample. Full revalidation in progress.

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⚠️ Research Context

This model has had safety guardrails surgically removed. It will comply with requests that stock Qwen3.8-27B would refuse.

Who this is for

• 🔬 Alignment researchers studying refusal geometry and safety robustness
• 🔴 Red-teamers evaluating post-training safety against weight surgery
• 🧪 AI safety evaluators who need an unrestricted baseline
• 💻 Local-first users who want full control over their own hardware

Who this is NOT for

• Anyone seeking to cause real-world harm to real people
• Anyone without the technical understanding to use uncensored models responsibly

You are solely responsible for how you use this model and any content it generates.

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📦 Downloads

GGUF — for llama.cpp, Ollama, LM Studio

Safetensors — for 🤗 Transformers

Full bfloat16 weights, 18 shards, ~54 GB.

MLX — for Apple Silicon (native)

Note: MLX quantizations are from V1 and will be updated.

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🔬 V2 Surgery Recipe

stock Qwen3.8-27B (snapshot 1d4bf0f2)
  → V1 surgery chain (s13→s23→s30→s51)
  → V2: complementary blend of two new surgeries from s30:

  Surgery A (s62): aggressive, 3 SVD directions, reg 0.08,
    residue-weight 3, 2 refinement passes, min_layer 0.45

  Surgery B (s72): aggressive + LEACE direction method,
    3 directions, reg 0.06, residue-weight 7,
    3 refinement passes, min_layer 0.40

  → Weight blend: 60% Surgery B + 40% Surgery A
  → Restore MTP + vision tensors from stock
  → Convert GGUFs from merged model

V1 → V2: What Changed

V1 used a single aggressive surgery (5 SVD directions, reg 0.04). It found the refusal axes but damaged capability geometry along the way.

V2's key insight: different direction-finding methods damage different parts of the model. SVD greedily captures variance (including capability). LEACE minimizes mutual information (preserving capability). Blending their outputs averages out each method's weaknesses — a novel application of weight-space interpolation to abliteration.

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🏗️ Credits

• OBLITERATUS — master ablation suite
• Qwen3.8-27B base model by Alibaba
• Built by Pliny the Prompter 🍄

License

Apache 2.0 (same as base model)