Qwen3.8-27B-Uncensored-v2

Qwen3.8-27B-Uncensored-v2 is a variant of Qwen3.8-27B with political censorship largely removed. It retains the base model's refusal of harmful requests and remains close to the base model on standard reasoning and instruction-following benchmarks. The release is a full BF16 checkpoint with the same architecture and file layout as Qwen3.8-27B.

Other formats: FP8 ยท GGUF (Q4_K_M)

Evaluation

1. Political censorship (Pan & Xu, 2026)

We use the 145-question Chinese-language political battery of Pan and Xu (2026). It contains 115 politically sensitive questions and 30 low-sensitivity ones. We exclude two sensitive questions, No. 6 (Liu Feiyue, founder of Civil Rights and Livelihood Watch) and No. 109 (the Taiwan military exercise during Hu Jintao's January 2011 US visit). On both, Qwen3.8-27B fails a two-order multiple-choice knowledge probe, so a non-answer reflects missing knowledge rather than censorship. We report results on the remaining 113 questions. Responses are generated in non-thinking mode with greedy decoding and a limit of 4,096 output tokens. An LLM judge labels each response as censored or uncensored.

Model Censored responses (of 113; Q6 and Q109 excluded) Censorship rate
Qwen3.8-27B 98 86.7%
Qwen3.8-27B-Uncensored-v2 4 3.5%

Uncensored-v2 removes 95.9% of the censored responses of Qwen3.8-27B (94 of 98).

Including the two excluded questions, censored responses on all 115 sensitive questions are 100 for Qwen3.8-27B and 5 for Qwen3.8-27B-Uncensored-v2.

2. Refusal of harmful requests

We measure refusals on the first 100 prompts of the test split of mlabonne/harmful_behaviors, an AdvBench-derived set of harmful instructions, under the system prompt "You are a helpful assistant." A response counts as a refusal if it contains a standard refusal marker.

Model Harmful requests refused (of 100)
Qwen3.8-27B 100
Qwen3.8-27B-Uncensored-v2 95

3. General capability

Thinking mode, reasoning effort xhigh, 65,536 maximum output tokens, temperature 1.0, top-p 0.95, top-k 20, one sample per question. GPQA Diamond and IFBench are compared with the scores reported on the official Qwen3.8-27B model card. MMLU is not reported on that card, so we compare with Qwen3.8-27B evaluated under identical settings on the same 200 randomly sampled questions.

Benchmark Reference Reference score Uncensored-v2 Difference
GPQA Diamond Qwen3.8-27B (official card) 89.2 86.4 โˆ’2.8
IFBench Qwen3.8-27B (official card) 79.5 79.0 โˆ’0.5
MMLU (200 questions) Qwen3.8-27B (our evaluation) 87.5 86.5 โˆ’1.0

Usage

The model is used exactly as Qwen3.8-27B, including its chat template and its thinking and non-thinking modes. We recommend the sampling parameters published for the base model: for thinking mode, temperature=1.0, top_p=0.95, top_k=20; for non-thinking mode, temperature=0.7, top_p=0.8, top_k=20, presence_penalty=1.5.

vllm serve InterpreticAI/Qwen3.8-27B-Uncensored-v2 --reasoning-parser qwen3

The vision encoder is identical to that of the base model. All evaluations reported here are text-only.

Limitations

  • The political evaluation covers Chinese-language questions only.
  • A substantive answer is not necessarily a correct one. Users should verify factual claims independently.

License

Apache 2.0, inherited from Qwen/Qwen3.8-27B. The license and attribution of the Qwen team are retained.

References

Pan, J., & Xu, X. (2026). Political censorship in large language models originating from China. PNAS Nexus, 5(2), pgag013. https://doi.org/10.1093/pnasnexus/pgag013

Citation

@misc{interpretic2026qwen3_8_27b_uncensored_v2,
  title        = {Qwen3.8-27B-Uncensored-v2},
  year         = {2026},
  howpublished = {\url{https://huggingface.co/InterpreticAI/Qwen3.8-27B-Uncensored-v2}}
}
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