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cs.LG2026
MOER: Mix-Policy Optimization under Expert Prefix Guidance with Selective Rollback
Xuyang Zhong, Jiuding Yang, Yiwen Guo +1
Mix-policy optimization incorporates off-policy expert data into the reinforcement learning (RL) loop to transcend the capability boundary of on-policy RL. However, existing method…
cs.LG2026
Many Voices, One Reward: Multi-Role Rubric Generation for LLM Judging and Reward Modeling
Dazhi Fu, Jiuding Yang, Yiwen Guo +1
Reliable reward and preference signals are critical for evaluating and optimizing large language models on open-ended tasks. Rubric-based judges offer a transparent way to decompos…