AgentAtlas: Beyond Outcome Leaderboards for LLM Agents

Fuente: arXiv
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Auteurs principaux: Mazaheri, Parsa, Mazaheri, Kasra
Format: Preprint
Publié: 2026
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author Mazaheri, Parsa
Mazaheri, Kasra
author_facet Mazaheri, Parsa
Mazaheri, Kasra
contents Large language model agents now act on codebases, browsers, operating systems, calendars, files, and tool ecosystems, but their evaluations often collapse behavior into final task success. AgentAtlas reframes agent evaluation as a diagnostic vocabulary and audit protocol for separating outcome success from control-decision quality and trajectory quality. The paper contributes: (i) a six-state control-decision taxonomy (Act / Ask / Refuse / Stop / Confirm / Recover); (ii) a trajectory-failure vocabulary with primary error source and downstream impact; (iii) a 0/1/2 benchmark-coverage audit over fifteen agent benchmarks; and (iv) an illustrative protocol study on a synthetic 1,342-item set evaluated with eight models under taxonomy-aware and taxonomy-blind prompt formats. The synthetic demonstration is not a public benchmark release and should not be read as a definitive model comparison. Instead, it illustrates two measurement risks: mapped label agreement can change substantially when the explicit label menu is removed, and axis choice can change apparent rankings. AgentAtlas is intended to help benchmark designers state what behavior they cover, and to help evaluators diagnose failures that outcome-only leaderboards hide.
format Preprint
id arxiv_https___arxiv_org_abs_2605_20530
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle AgentAtlas: Beyond Outcome Leaderboards for LLM Agents
Mazaheri, Parsa
Mazaheri, Kasra
Artificial Intelligence
Computation and Language
Machine Learning
Software Engineering
I.2.7; I.2.6; I.2.11
Large language model agents now act on codebases, browsers, operating systems, calendars, files, and tool ecosystems, but their evaluations often collapse behavior into final task success. AgentAtlas reframes agent evaluation as a diagnostic vocabulary and audit protocol for separating outcome success from control-decision quality and trajectory quality. The paper contributes: (i) a six-state control-decision taxonomy (Act / Ask / Refuse / Stop / Confirm / Recover); (ii) a trajectory-failure vocabulary with primary error source and downstream impact; (iii) a 0/1/2 benchmark-coverage audit over fifteen agent benchmarks; and (iv) an illustrative protocol study on a synthetic 1,342-item set evaluated with eight models under taxonomy-aware and taxonomy-blind prompt formats. The synthetic demonstration is not a public benchmark release and should not be read as a definitive model comparison. Instead, it illustrates two measurement risks: mapped label agreement can change substantially when the explicit label menu is removed, and axis choice can change apparent rankings. AgentAtlas is intended to help benchmark designers state what behavior they cover, and to help evaluators diagnose failures that outcome-only leaderboards hide.
title AgentAtlas: Beyond Outcome Leaderboards for LLM Agents
topic Artificial Intelligence
Computation and Language
Machine Learning
Software Engineering
I.2.7; I.2.6; I.2.11
url https://arxiv.org/abs/2605.20530