BrowseComp Extended

Name: BrowseComp Extended
Creator: Mercor

Persistent web research and information discovery.

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100Mercor tasks

130Public tasks

44.5%Highest score

The BrowseComp Extended leaderboard

130 questions requiring agents to persistently navigate the internet to locate hard-to-find, entangled information. Tests information-discovery competence through persistence and creative problem-solving.

Paper Data Code Sample task

Model

Score

Fable 5High

Score on the original open-source benchmark: 82.5% / Score on this Mercor-extended benchmark: 44.5%

Opus 5Max

Score on the original open-source benchmark: 84.6% / Score on this Mercor-extended benchmark: 44.0%

GPT-5.6 SolxHigh

Score on the original open-source benchmark: 90.6% / Score on this Mercor-extended benchmark: 32.3%

Opus 4.8Max

Score on the original open-source benchmark: 73.7% / Score on this Mercor-extended benchmark: 30.0%

Kimi K3Max

Score on the original open-source benchmark: 89.0% / Score on this Mercor-extended benchmark: 28.5%

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BrowseComp Extended

The BrowseComp Extended leaderboard

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