arXiv AI By Qin-Wen Luo, Sheng Ren, Xiang Chen, Rui Liu, Jun Fang, Naiqiang Tan, Jun Wang, Hua Chai, Sheng-Jun Huang

Heterogeneous Co-Evolution Learning for Tool-Efficient Search Agents with Zero Labels

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The paper introduces ZEST-Search, a zero-label framework that trains search agents by co-evolving task generation and solver learning. It constructs validated search tasks online from unlabeled questions, using a heterogeneous proposer to adapt task difficulty to the solver’s evolving capabilities. The approach rewards the proposer for intermediate difficulty and the solver for tool-aware performance, leading to improved search efficiency and accuracy across multiple question‑answering benchmarks.

Machine-generated by The Flow from the publisher's headline and feed description — not written or checked by a human. The full article lives at arXiv AI.

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