Terminal-Bench 2.1 Extended

Name: Terminal-Bench 2.1 Extended
Creator: Mercor

Long-horizon command-line agent execution.

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99Mercor tasks

89Public tasks

38.0%Highest score

The Terminal-Bench 2.1 Extended leaderboard

Evaluates AI agents on hard, realistic long-horizon command-line tasks — 89 curated tasks with unique environments, human-written solutions, and verification tests.

Paper Data Code Sample task

Model

Score

GPT-5.5xHigh

Score on the original open-source benchmark: 83.1% / Score on this Mercor-extended benchmark: 38.0%

Gemini 3.1 ProHigh

Score on the original open-source benchmark: 72.7% / Score on this Mercor-extended benchmark: 35.0%

Opus 5High

34.0%

Grok 4.5High

Score on the original open-source benchmark: 79.0% / Score on this Mercor-extended benchmark: 33.3%

GPT-5.4xHigh

Score on the original open-source benchmark: 77.2% / Score on this Mercor-extended benchmark: 31.3%

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Terminal-Bench 2.1 Extended

The Terminal-Bench 2.1 Extended leaderboard

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