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Xiaodong Liu

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Jul 2026

Weak-to-Strong On-Policy Distillation

W2S-OPD is introduced, a simple yet effective OPD framework that improves the strong student by distilling from multiple weak models, and outperforms OPD, enables the student to surpass the domain teacher, and keeps improving the student even when every supervision source is weaker.

Fangxu Yu, Zinan Lin, Xiaodong Liu et al. · 7 citations · ⚡1
#natural language process... Preprint Sep 2026

Register Tokens for Bounded-State Reasoning in Diffusion Language Models

Masked diffusion language models (dLLMs) generate text by iteratively denoising masked tokens with bidirectional attention. Extending reasoning across generation chunks normally requires keeping earlier generated text in context. We ask whether a dLLM can instead continue reasoning after that text is cleared, using onl...

Albert Ge, C. Singh, Yu-Fan Zhuang et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Reinforcement Learning over Patient Trajectories for Clinical Reasoning in EHR Foundation Models

This work proposes a reinforcement learning (RL) fine-tuning framework that treats EHR foundation models as generative policies over patient trajectories, and finds that RL fine-tuning consistently improves over pre-trained backbones and strong baselines.

Yu-Xin Xiao, Sheng Zhang, C. Singh et al. · 0 citations
Jul 2026

GFlowRL: Scaling Distribution-Matching RL to Large Language Models

GFlowRL, a streamlined GFlowNet-style RL algorithm that removes the auxiliary partition network entirely while preserving the reward-distribution-matching objective, is proposed, and is the first GFlowNet-style RL algorithm to scale stably across both dense and sparse architectures.

Xiaodong Liu, Michael Xu, Jack W. Stokes et al. · 0 citations

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