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Author

Xiangxin Zhou

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Jul 2026

Predictive Divergence Masks for LLM RL

The predictive divergence mask is proposed, which asks whether the next policy-gradient step will increase or decrease the same divergence used by the trust region, and the resulting masks improve RL training across model scales and precision settings.

Xiang-Xin Zhou, Jiarui Yao, Penghui Qi et al. · 0 citations
Preprint Aug 2026

Best Practice Critic Optimization

Best Practice Critic Optimization (BPCO) is developed, a recipe that combines DPPO, value predictions bounded to the reward range, Monte Carlo value targets, unnormalized policy advantages, and length-adaptive generalized advantage estimation and shows that a carefully designed critic provides a reliable alternative to...

Penghui Qi, Xiang-Xin Zhou, Wee-Sun Lee · 3 citations · ⚡1

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