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News/Last Step Matters: Early Uncertainty Cannot Predict Failure in Long-Horizon Agents
arxiv
PublishedSeptember 1, 2026 at 4:00 AM

Last Step Matters: Early Uncertainty Cannot Predict Failure in Long-Horizon Agents

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arXiv:2608.29685v1 Announce Type: new Abstract: Early failure prediction is important for long-horizon agents, as it enables timely intervention and can reduce inference and tool-use costs. Uncertainty quantification, such as verbal confidence and perplexity, offers a promising approach to detecting

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