ResearchResearch paperLarge Language Models · Retrieval, RAG & Search · Efficiency & Inference1 source · Oct 18, 2026

Where and Why Search-Augmented LLMs Fail When Reasoning over Rapidly Evolving Knowledge

To address this gap, we introduce TREK, a suite of three components: TREKTRACE is a plug-and-play framework that attributes failures to specific stages of retrieval and reasoning.

Key points

  • As the world changes, new information is published while older records remain online.
  • This complicates reasoning for large language models (LLMs), which must retrieve evidence and resolve conflicts to determine which information remains valid.
  • We apply it to TREKBENCH-WILD, a meta-benchmark of real-world questions that require complex reasoning over rapidly evolving knowledge.
  • To study this bottleneck, we build TREKBENCH-CTRL, a controlled benchmark with distractors spanning temporality, relevance, and trustworthiness, and show that benchmarks dominated by outdated distractors substantially underestimate task difficulty.

Sources (1)

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