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Characterizing Deep Research: A Benchmark and Formal Definition

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arxiv 2508.04183 v1 pith:KPWYTBV3 submitted 2025-08-06 cs.CL

Characterizing Deep Research: A Benchmark and Formal Definition

classification cs.CL
keywords deepresearchbenchmarksearchreasoningsystemscapabilitieschallenging
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Information tasks such as writing surveys or analytical reports require complex search and reasoning, and have recently been grouped under the umbrella of \textit{deep research} -- a term also adopted by recent models targeting these capabilities. Despite growing interest, the scope of the deep research task remains underdefined and its distinction from other reasoning-intensive problems is poorly understood. In this paper, we propose a formal characterization of the deep research (DR) task and introduce a benchmark to evaluate the performance of DR systems. We argue that the core defining feature of deep research is not the production of lengthy report-style outputs, but rather the high fan-out over concepts required during the search process, i.e., broad and reasoning-intensive exploration. To enable objective evaluation, we define DR using an intermediate output representation that encodes key claims uncovered during search-separating the reasoning challenge from surface-level report generation. Based on this formulation, we propose a diverse, challenging benchmark LiveDRBench with 100 challenging tasks over scientific topics (e.g., datasets, materials discovery, prior art search) and public interest events (e.g., flight incidents, movie awards). Across state-of-the-art DR systems, F1 score ranges between 0.02 and 0.72 for any sub-category. OpenAI's model performs the best with an overall F1 score of 0.55. Analysis of reasoning traces reveals the distribution over the number of referenced sources, branching, and backtracking events executed by current DR systems, motivating future directions for improving their search mechanisms and grounding capabilities. The benchmark is available at https://github.com/microsoft/LiveDRBench.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. From Simple QA to Deep Research: A Verifiable Benchmark Constructed through Iterative Task Evolution

    cs.AI 2026-08 conditional novelty 6.0

    An automatic pipeline evolves simple QA questions into 500 deep-research tasks with DAG-structured, fact-grounded rubrics that discriminate between models.

  2. LakeQA: An Exploratory QA Benchmark over a Million-Scale Data Lake

    cs.CL 2026-06 unverdicted novelty 6.0

    Introduces LakeQA, a new expert-annotated benchmark for search-centric multi-hop QA over a million-scale heterogeneous data lake, showing low performance (18.37% exact match) on frontier LLMs like GPT-5.2.

  3. DEER: A Benchmark for Evaluating Deep Research Agents on Expert Report Generation

    cs.CL 2025-12 conditional novelty 6.0

    DEER uses 7 evaluation dimensions, 101 rubric items, task-specific expert guidance, and unsupported-claim backtracking to score deep-research reports; current systems score lowest on fulfilling expert requests and ana...

  4. Agentic Environment Engineering for Large Language Models: A Survey of Environment Modeling, Synthesis, Evaluation, and Application

    cs.CL 2026-06 unverdicted novelty 5.0

    This survey categorizes agentic environments for LLMs by eight attributes and domains, introduces symbolic and neural synthesis paradigms with evaluation, and outlines four agent evolution pathways plus three environm...

  5. LLM-Oriented Information Retrieval: A Denoising-First Perspective

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    Denoising to maximize usable evidence density and verifiability is becoming the primary bottleneck in LLM-oriented information retrieval, conceptualized via a four-stage framework and addressed through a pipeline taxo...

  6. LLM-Oriented Information Retrieval: A Denoising-First Perspective

    cs.IR 2026-05 unverdicted novelty 4.0

    Argues for a denoising-first paradigm in LLM-oriented information retrieval, framing challenges via a four-stage progression and providing a taxonomy of signal-to-noise optimization techniques across the pipeline.