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cs.AI2026

From Profiling to Synthesis: Benchmarking Implicit Behavioral Alignment in Personalized LLM Agents

Jiajia Song, Bobo Li, Haiwen Yi +6

Large Language Models have enabled increasingly capable autonomous agents, yet personalization remains critical for making such agents practically useful. Recent benchmarks have be…

cs.AI2026

Agent Reinforcement Learning via Pivotal-Aware Self-Feedback Retry

Weiyang Guo, Zesheng Shi, Longhui Zhang +3

Large language model (LLM) agents have shown strong decision-making capabilities in long-horizon interactive tasks, yet they still struggle to effectively leverage failed trajector…

cs.AI2026

AgentDropoutV2: Optimizing Information Flow in Multi-Agent Systems via Test-Time Rectify-or-Reject Pruning

Yutong Wang, Siyuan Xiong, Xuebo Liu +4

While Multi-Agent Systems (MAS) excel in complex reasoning, they suffer from the cascading impact of erroneous information from individual agents. Current solutions often resort to…

cs.AI2026

OGER: A Robust Offline-Guided Exploration Reward for Hybrid Reinforcement Learning

Xinyu Ma, Mingzhou Xu, Xuebo Liu +4

Recent advancements in Reinforcement Learning with Verifiable Rewards (RLVR) have significantly improved Large Language Model (LLM) reasoning, yet models often struggle to explore…

cs.AI2026

Step-GRPO: Internalizing Dynamic Early Exit for Efficient Reasoning

Benteng Chen, Weida Wang, Shufei Zhang +2

Large reasoning models that use long chain-of-thought excel at problem-solving yet waste compute on redundant checks. Curbing this overthinking is hard: training-time length penalt…

cs.AI2026

Dynamic Sampling that Adapts: Self-Aware Iterative Data Persistent Optimization for Mathematical Reasoning

Jun Rao, Xuebo Liu, Hexuan Deng +5

In mathematical reasoning, data selection strategies predominantly rely on static, externally defined metrics, which fail to adapt to the evolving capabilities of models during tra…