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20222026
most citedSecrets of RLHF in Large Language Models Part I: PPO

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cs.LG2026

EVPO: Explained Variance Policy Optimization for Adaptive Critic Utilization in LLM Post-Training

Chengjun Pan, Shichun Liu, Jiahang Lin +10

Reinforcement learning (RL) for LLM post-training faces a fundamental design choice: whether to use a learned critic as a baseline for policy optimization. Classical theory favors…