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X. Wang

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#machine learning Preprint Oct 2026

AdaStep: Adaptive Step Credit Weighting for Agentic Reinforcement Learning

Long-horizon LLM agents are typically trained with sparse outcome rewards, making trajectory-level objectives too coarse to distinguish the contribution of individual decisions. Step-level credit assignment provides finer-grained supervision, but its estimates can be unreliable because observed returns also depend on s...

X. Wang, Wen-Hao Wu, Meng-Hao Zhang et al. · 0 citations
Preprint Sep 2026

Absorbing State Phase Transitions in Multi-Agent Search

Nontrivial dynamics can emerge in large language model (LLM)-based multi-agent systems, and preliminary evidence exists that formalisms from statistical mechanics can be effective at modeling and predicting such behaviors. In parallel, designing multi-agent communication topology for optimal task-solving is an active r...

Wen-Wen Zheng, Yuzhe Yang, Helen Qu et al. · 0 citations
#artificial intelligence Preprint Sep 2026

HarnessPAI: An Evolving Harness for Physical AI

The results suggest that the frontier of Physical AI depends not only on stronger action models, but also on executable harnesses that integrate perception, task understanding and reasoning, and action execution into a unified, verifiable, and feedback-driven system.

X. Wang, Wen-Hao Wu, Meng-Hao Zhang et al. · 1 citation
Preprint Aug 2026

TRACE: A Self-Evolving Skill Bank for Consistent, Limit-Aware LLM Agents

Results show that TRACE converts high model potential into stable, consistent performance gain, and bridge the gap between potential and reliable performance to just 4.0 points.

Wen-Hao Wu, Meng-Hao Zhang, X. Wang et al. · 2 citations
Jul 2026

Multi-Agent LLMs Fail to Explore Each Other

This work introduces Multi- Agent Contextual Exploration (MACE), a lightweight framework that explicitly promotes exploration through structured peer selection that substantially improves exploration behavior and downstream task performance and shows theoretically that the value of exploration increases with agent dive...

Hyeong Kyu Choi, Jiatong Li, Wendi Li et al. · 1 citation
Jun 2026

OSWorld2.0: Benchmarking Computer Use Agents on Long-Horizon Real-World Tasks

These results show that current agents are still far from professional-level computer use: rather than stumbling on basic GUI control or coding, they lose track of constraints, miss information that arrives mid-task, guess rather than ask the user, and skip verification, struggling most when a task hinges on hidden sta...

Mengqi Yuan, Zilong Zhou, Xinzhuang Xiong et al. · 11 citations · ⚡5

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