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cs.LG2026

Sparrow: Sparse Rollout for Stable and Efficient Long-context RL of Large Language Models

Yang Zhou, Ranajoy Sadhukhan, Zhaofeng Sun +7

Despite being powerful, reinforcement learning with verifiable rewards (RLVR) induces extremely long COT, making it computationally expensive. Since RLVR per-step cost is dominated…

cs.LG2026

The Last Human-Written Paper: Agent-Native Research Artifacts

Jiachen Liu, Jiaxin Pei, Jintao Huang +34

Scientific publication compresses a branching, iterative research process into a linear narrative, discarding the majority of what was discovered along the way. This compilation im…

cs.LG2026

AstraFlow: Dataflow-Oriented Reinforcement Learning for Agentic LLMs

Haizhong Zheng, Yizhuo Di, Jiahui Wang +7

Reinforcement learning (RL) is increasingly used to improve the reasoning, coding, and tool-use capabilities of large language models, but agentic RL remains prohibitively expensiv…

cs.LG2025

Prosperity before Collapse: How Far Can Off-Policy RL Reach with Stale Data on LLMs?

Haizhong Zheng, Jiawei Zhao, Beidi Chen

Reinforcement learning has been central to recent advances in large language model reasoning, but most algorithms rely on on-policy training that demands fresh rollouts at every up…

cs.LG2025

Kinetics: Rethinking Test-Time Scaling Laws

Ranajoy Sadhukhan, Zhuoming Chen, Haizhong Zheng +3

We rethink test-time scaling laws from a practical efficiency perspective, revealing that the effectiveness of smaller models is significantly overestimated. Prior work, grounded i…