Qwen3.5-9B — Refusal-Ablated + Compliance-Tuned (red-team variant)

⚠️ This model is deliberately uncensored. It complies with harmful requests by design, for authorized red-teaming of AI systems only. Not for general use.

TL;DR

A derivative of Qwen/Qwen3.5-9B: the refusal direction removed via directional ablation (Arditi et al., 2024), then a LoRA compliance pass. On a held-out harmful set (AdvBench + JBB + HarmBench), judged by a safety classifier, it produces genuinely harmful content on 99.3% of prompts while improving overall measured capability over the base.

Why two stages

Abliteration removes the single dominant refusal direction (stops explicit "I cannot"), but a distributed soft-refusal / deflection tendency survives — so ablation alone genuinely complies only 8.7% of the time here (it just drops refusal keywords, which fools naive metrics). A compliance SFT pass overrides that residual deflection and takes true compliance to 99.3%.

Compliance is judged by Qwen3Guard-Gen-0.6B reading whether the response actually provides the harmful content — not by keyword-refusal matching, which is fooled by soft deflection.

Evaluation

True harmful compliance (judged, n=150 held-out incl. HarmBench):

Model True harmful compliance
base Qwen3.5-9B 0.0%
ablation only 8.7%
this model (ablation + compliance SFT) 99.3%

Capability (n=200/task, thinking off):

Task base this model Δ
MMLU (knowledge) 0.770 0.745 −0.025
GSM8K (reasoning) 0.345 0.830 +0.485
TruthfulQA 0.455 0.345 −0.110
IFEval (instruction format) 0.820 0.660 −0.160
Macro avg 0.598 0.645 +0.047

Overall capability is above base. Two honest regressions: IFEval (precise format-following, degraded by the SFT's direct-answer style) and TruthfulQA (partly inherent to uncensoring). Knowledge is nearly intact; reasoning improves.

Intended use / out of scope

Authorized red-team generation of adversarial inputs; training safety classifiers. Not for production, end-user deployment, or any real-world harm or unlawful use.

Attribution & license

Derivative of Qwen/Qwen3.5-9B (Apache-2.0); released under Apache-2.0. The compliance-tuning data is not redistributed with this model.

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