ResearchResearch paperLarge Language Models · Agents & Tool Use · Safety & Alignment1 source · Oct 21, 2026

Benchmarking and Error Analysis of Deep Search and Deep Research LLM Agents

As Large Language Models (LLMs) evolve into autonomous Deep Search and Deep Research Agents capable of executing long-horizon, multi-step tasks, evaluating their reliability becomes increasingly critical.

Key points

  • However, existing evaluation paradigms predominantly focus on final task outcomes, leaving a significant gap in understanding the intermediate execution traces, where agents are highly susceptible to various errors.
  • To address this critical gap, we introduce a comprehensive methodology and analytical framework designed specifically to diagnose errors in intermediate workflows.
  • Through a systematic examination of step-by-step execution traces and agent-environment interactions, we reveal how these underlying errors affect overall performance.
  • Finally, through empirical experiments and systematic analysis of the identified error types, we provide actionable design guidelines, aiming to enhance the robustness, reasoning capabilities, and reliability of Deep Search and Deep Research agents.

Sources (1)

  • [1]Benchmarking and Error Analysis of Deep Search and Deep Research LLM Agents
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 21, 07:38 AM
    As Large Language Models (LLMs) evolve into autonomous Deep Search and Deep Research Agents capable of executing long-horizon, multi-step tasks, evaluating their reliability becomes increasingly critical.
    However, existing evaluation paradigms predominantly focus on final task outcomes, leaving a significant gap in understanding the intermediate execution traces, where agents are highly susceptible to various errors.

Extractive summary: sentences quoted from the sources.

Before this

  1. Oct 20, 2026MAS-Guard: Unified Guardrails from Individual Agents to Multi-Agent LLM Systems
  2. Oct 20, 2026RANGER: Retrieval Agent for Navigating Graphs with Semantic Evaluation Rewards
  3. Oct 20, 2026SliMOO: Interpretable Multi-Objective Evolutionary Search for LLM Depth Pruning
  4. Oct 20, 2026Do Diffusion LLMs Scale? Testing Mercury 3 + Decide
  5. Oct 19, 2026Evaluating Agents on Highly Subjective Tasks
  6. Oct 19, 2026Introducing Clairic, a new System One class of extraction models

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