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cs.CL2026

State2State: Environment-Derived Mid-Training for LLM Agents

Xuanyu Lei, Yiqi Zhu, Chenliang Li +6

Training LLM agents commonly relies on supervised fine-tuning from expert trajectories or online reinforcement learning over human-specified tasks with handcrafted verifiers. Thoug…

cs.CL2026

CorpusQA: A 10 Million Token Benchmark for Corpus-Level Analysis and Reasoning

Zhiyuan Lu, Chenliang Li, Yingcheng Shi +3

While large language models now handle million-token contexts, their capacity for reasoning across entire document repositories remains largely untested. Existing benchmarks are in…

cs.CL2026

Writing-RL: Advancing Long-form Writing via Adaptive Curriculum Reinforcement Learning

Xuanyu Lei, Chenliang Li, Yuning Wu +7

Recent advances in Large Language Models(LLMs) have enabled strong performance in long-form writing, but current training paradigms remain limited: Supervised Fine-Tuning (SFT) rem…

cs.CL2026

R2-Write: Reflection and Revision for Open-Ended Writing with Deep Reasoning

Wanlong Liu, Bo Zhang, Chenliang Li +4

While deep reasoning with long chain-of-thought has dramatically improved large language models in verifiable domains like mathematics, its effectiveness for open-ended tasks such…

cs.CL2026

SPELL: Self-Play Reinforcement Learning for Evolving Long-Context Language Models

Ziyi Yang, Weizhou Shen, Chenliang Li +5

Progress in long-context reasoning for large language models (LLMs) has lagged behind other recent advances. This gap arises not only from the intrinsic difficulty of processing lo…

cs.CL2026

Incentivizing In-depth Reasoning over Long Contexts with Process Advantage Shaping

Miao Peng, Weizhou Shen, Nuo Chen +3

Reinforcement Learning with Verifiable Rewards (RLVR) has proven effective in enhancing LLMs short-context reasoning, but its performance degrades in long-context scenarios that re…