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Terminal-Bench-Science 0.1

Completing multi-step tasks in a real terminal: shell commands, builds, data wrangling and debugging, graded automatically.

  1. 1GPT-6 Astra · OpenAI
    64.6%
  2. 2Claude Opus 5.5 · Anthropic
    58.7%
  3. 3Claude Fable 5.1 · Anthropic
    52.6%

How each maker reported it

  • GPT-6 Astra Launch post (openai.com/index/gpt-6-astra); system card §6, §10.1; GPT-6.1 Sol addendum §5, §9

    Coding and reasoning rows come from the GPT-6 Astra launch post (3 Sep 2026); OpenAI's own comparison table, settings as published there. The system card reports safety and Preparedness evaluations, not general capability benchmarks. Cyber and bio scores are at maximum reasoning effort; bio scores are refusal-adjusted. HealthBench scores are length-adjusted. GPT-6.1 Sol and some GPT-5.6 Sol values come from the GPT-6.1 Sol addendum (29 Sep 2026).

  • Claude Opus 5.5 Table 8.1.A, p.174

    Claude results use adaptive thinking at max effort, averaged over five trials (Terminal-Bench 4.0 at xhigh). Competitor figures come from the developers' own published results.

  • Claude Fable 5.1 Table 8.1.A, p.167

    Fable 5.1 and Mythos 5.1 share weights, so column 0 covers both (likewise Fable 5 / Mythos 5). Claude results use adaptive thinking at max effort, averaged over five trials. Terminal-Bench 4.0 values are from §8.6, p.171 (Mythos 5.1: 60.9%; GPT-5.6 Sol from the public leaderboard). Competitor figures come from the developers' own published results or leaderboards.

Only each model's own maker's number is shown; scores a maker reports for rival models are left out.