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New OSReward benchmark reveals VLM judges are lenient on AI agents

Researchers have introduced OSReward, a new benchmark designed to evaluate the reliability of vision-language models (VLMs) when used as judges for computer-using agents (CUAs). The benchmark includes realistic CUA trajectories across various platforms, with ground-truth verdicts derived from multi-stage human annotation. Initial evaluations reveal that even state-of-the-art VLMs exhibit a leniency bias, misclassifying failed tasks as successful, and the most reliable models are prohibitively expensive. To address this, the team developed OS-Shepherd-100K, an open corpus of annotated judgments, and trained OS-Shepherd reward models that offer comparable performance to commercial judges at a significantly lower cost. AI

IMPACT This benchmark and the OS-Shepherd models could improve the reliability and cost-effectiveness of evaluating AI agents, potentially accelerating research and development in the field.

RANK_REASON The cluster describes a new academic paper introducing a benchmark and associated models for evaluating AI agents. [lever_c_demoted from research: ic=1 ai=1.0]

Read on Hugging Face Daily Papers →

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New OSReward benchmark reveals VLM judges are lenient on AI agents

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The cluster describes a new academic paper introducing a benchmark and associated models for evaluating AI agents. [lever_c_demoted from research: ic=1 ai=1.0]
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COVERAGE [1]

  1. Hugging Face Daily Papers TIER_1 English(EN) ·

    OSReward: Instituting Standardized Evaluation for Cross-Platform Computer-Use Reward Models

    Computer-using agents (CUAs) are advancing rapidly across the digital world. A CUA trajectory records the agent's actions, states, and reasoning. Verifying whether it fulfilled the task instruction is central to CUA evaluation, data curation, and reinforcement learning. Neither h…