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cs.AI2026

HyMem: Hierarchical Context Management for Long-Horizon Agents via Information Isolation

XinQi Wang, Jinwei Xiao, Sijia Cui +4

Large language model (LLM) agents often perform poorly on complex, long-horizon tasks because their context becomes increasingly cluttered over time. As interactions accumulate, de…

cs.AI2026

Finding the Evidence: Discovering Decision-Supporting Tokens for On-Policy Reasoning Distillation

Jinwei Xiao, Zhuowen Han, Yueqing Sun +6

On-policy distillation transfers reasoning ability through dense token-level supervision, yet the nature of the transferable signal remains unclear. We discover that reasoning chai…

cs.AI2026

MAP: A Map-then-Act Paradigm for Long-Horizon Interactive Agent Reasoning

Yuxin Liu, Ziang Ye, Yueqing Sun +6

Current interactive LLM agents rely on goal-conditioned stepwise planning, where environmental understanding is acquired reactively during execution rather than established beforeh…

cs.AI2026

LongCat-Flash-Thinking-2601 Technical Report

Meituan LongCat Team, Anchun Gui, Bei Li +162

We introduce LongCat-Flash-Thinking-2601, a 560-billion-parameter open-source Mixture-of-Experts (MoE) reasoning model with superior agentic reasoning capability. LongCat-Flash-Thi…

cs.AI2025

Coarse-to-Fine Grounded Memory for LLM Agent Planning

Wei Yang, Jinwei Xiao, Hongming Zhang +3

Recent advancements in Large Language Models (LLMs) have driven growing interest in LLM-based agents for complex planning tasks. To avoid costly agent training, many studies adopte…