Qwen Releases Real-Time Refusal Control Technology

Existing uncensored models required the creation of separate checkpoints, but this technology implements refusal-direction ablation as a real-time runtime variable ($\lambda$).

By combining the Qwen3.8-27B checkpoint with a 2.6MB direction bundle, users can instantly switch from $\lambda=0$ (pure base model) to $\lambda=1$ (adjusted ablation) without reloading weights.

Key experimental results are as follows:

• Refusal frequency: Decreased from 32/60 to 0/60, eliminating strict refusals.
• Benchmark performance: Maintained stable figures without statistically significant performance degradation on GSM8K (84% $\rightarrow$ 81%), MMLU-Pro (76.79% $\rightarrow$ 75%), etc.
• MTP acceptance rate: Performance was largely maintained for code (78.01% $\rightarrow$ 75.64%) and general traffic (57.93% $\rightarrow$ 56.89%).

However, if the $\lambda$ value exceeds 1.5, quality may degrade or effects may reverse, requiring appropriate parameter tuning.