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CAS: Conformalized Agentic Search via Adaptive Retrieval and Policy Weighting

Research LLM Agents

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TL;DR - CAS applies conformal prediction to agentic search, adapting retrieval depth and weighting reinforcement-learning trajectories by answer confidence. It aims to improve QA reasoning reliability while reducing unnecessary tool calls.

  • Adaptive Prediction Sets dynamically truncate retrieved documents instead of relying on a fixed Top-K cutoff.
  • Adaptive Conformal Inference estimates answer confidence with controllable coverage during training.
  • CAS penalizes low-confidence trajectories within the Group Relative Policy Optimization objective.
  • Experiments on single-hop and multi-hop QA report higher reasoning accuracy and substantially fewer redundant tool invocations.

Sources (1)

CAS: Conformalized Agentic Search via Adaptive Retrieval and Policy Weighting

arXiv cs.AI Zixi Zhu, Jiayuan Su, Jian Zhang, Yu Lin, Hongwei Wang 2026-08-21 arXiv:2608.20771
Public signals Semantic Scholar citations 0 · Semantic Scholar influential citations 0
Providers: Hugging Face · N/A OpenAlex · N/A Publisher · N/A Semantic Scholar · Citations 0 · Influential citations 0 X · N/A Fetched 2026-08-31 14:16:38.912544 UTC

TL;DR - CAS applies conformal prediction to agentic search, adapting retrieval depth and weighting reinforcement-learning trajectories by answer confidence. It aims to improve QA reasoning reliability while reducing unnecessary tool calls.

  • Adaptive Prediction Sets dynamically truncate retrieved documents instead of relying on a fixed Top-K cutoff.
  • Adaptive Conformal Inference estimates answer confidence with controllable coverage during training.
  • CAS penalizes low-confidence trajectories within the Group Relative Policy Optimization objective.
  • Experiments on single-hop and multi-hop QA report higher reasoning accuracy and substantially fewer redundant tool invocations.
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