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Author

Xing Han Lù

McGill University

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Preprint Sep 2026

AdaptArena: Evaluating Test-Time Personalization of Web Agents

It is found that correctly inferring user preferences is necessary but not sufficient for task success, as execution failures in downstream web interactions remain a significant bottleneck even when agents align with the target preference.

Dong-Chan Shin, Xing Han Lù, Jiaqi Deng et al. · 0 citations

FocusAgent: Simple Yet Effective Ways of Trimming the Large Context of Web Agents

A variant of FocusAgent significantly reduces the success rate of prompt-injection attacks, including banner and pop-up attacks, while maintaining task success performance in attack-free settings, highlighting that targeted LLM-based retrieval is a practical and robust strategy for building web agents that are efficien...

Imene Kerboua, S. Shayegan, Megh Thakkar et al. · 15 citations
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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