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Weak-to-Strong On-Policy Distillation

49 upvotes · 28 JUL 2026 · Fangxu Yu, Zinan Lin, Xiaodong Liu et al.

This paper introduces a new method for transferring capabilities from multiple weak models to a strong student model in reinforcement learning, allowing the student to surpass the domain teacher. Practitioners may care about this approach for improving the performance of their own reinforcement learning models.

on-policy distillationweak-to-strong transferlogit spacereverse KL divergencecontrast pairsreinforcement learning models