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20242026
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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.LG2026

STEM: Scaling Transformers with Embedding Modules

Ranajoy Sadhukhan, Sheng Cao, Harry Dong +5

Fine-grained sparsity promises higher parametric capacity without proportional per-token compute, but often suffers from training instability, load balancing, and communication ove…

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…

cs.LG2025

Memory Mosaics

Jianyu Zhang, Niklas Nolte, Ranajoy Sadhukhan +2

Memory Mosaics are networks of associative memories working in concert to achieve a prediction task of interest. Like transformers, memory mosaics possess compositional capabilitie…