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LoongReflect: Boosting Long-Horizon Reflection in Search Agents via Global Perspective Distillation

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TL;DR - LoongReflect trains search agents to make better long-horizon reflection and backtracking decisions by combining global teacher supervision with outcome-based reinforcement learning. It improves multi-hop retrieval and mathematical reasoning over outcome-only RL and self-distillation baselines.

  • Models reflection as memory control over a reversible trajectory tree.
  • Reflection updates working memory with verified facts, missing evidence, and branch risks.
  • Backtracking removes unreliable branches while retaining concise corrective lessons.
  • Coordinates targeted teacher distillation with trajectory-level GRPO using a look-ahead, extragradient-style mechanism.

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LoongReflect: Boosting Long-Horizon Reflection in Search Agents via Global Perspective Distillation

arXiv cs.LG Zhixin Zhang, Xinke Jiang, Zhibang Yang, Weixuan Xu, Guohong Qiu, Xu Chu, Junfeng Zhao, Yasha Wang 2026-08-12 arXiv:2608.11967
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 2026-09-10 14:30:00.628572 UTC

TL;DR - LoongReflect trains search agents to make better long-horizon reflection and backtracking decisions by combining global teacher supervision with outcome-based reinforcement learning. It improves multi-hop retrieval and mathematical reasoning over outcome-only RL and self-distillation baselines.

  • Models reflection as memory control over a reversible trajectory tree.
  • Reflection updates working memory with verified facts, missing evidence, and branch risks.
  • Backtracking removes unreliable branches while retaining concise corrective lessons.
  • Coordinates targeted teacher distillation with trajectory-level GRPO using a look-ahead, extragradient-style mechanism.
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