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OpenAI

GPT-6.1 Terra: benchmarks, price and rank

GPT-6.1 Terra from OpenAI is 11th of 123 rated AI models on Spezia's leaderboard, strongest on FrontierMath and LifeSci Diamond. It costs $1 in, $5 out per million tokens.

  • 11th of 123 rated models
  • Rating 1,818
  • Rated on 9 benchmarks
  • Closed
  • Released Oct 26, 2026
  • 1.1 million tokens of context
  • Knows the world to June 2026

Where it is strongest

  • 5th of 76 on FrontierMath
  • 3rd of 18 on LifeSci Diamond
  • 6th of 66 on FrontierMath Tier 4
  • 10th of 103 on GPQA Diamond
  • 6th of 94 on Epoch Capabilities Index

Where it falls behind

  • 12th of 16 on HealthBench
  • 10th of 17 on Terminal-Bench 4.0

Price: $1 in, $5 out per million tokens.

Its headline results

The benchmarks that count most in the rating, with its place among the models measured the same way, and where each number came from.

  • APEX-Agents68.3%

    Long tasks written by investment banking analysts, management consultants and corporate lawyers from their own work, done across files and apps in a realistic work setup.

    8th of 56. Independent result from Epoch AI.

  • Terminal-Bench 4.050.3%

    Hard jobs done in a real computer terminal: building and fixing software, setting up systems, and science and engineering problems.

    10th of 17. The maker's own number, from OpenAI, via LLM Stats.

  • Vending-Bench 2$9,107

    The model runs a simulated vending machine business for a year on its own: finding suppliers, ordering stock, setting prices and paying the daily fees.

    13th of 60. Independent result from Epoch AI.

  • SimpleBench72.2%

    Multiple-choice puzzles about everyday situations, space, time and people, written to trip up models that pattern-match instead of think. Ordinary adults do well on them.

    22nd of 68. Independent result from Epoch AI.

  • SimpleQA Verified57.3%

    Short factual questions with one checked answer, asked without web search.

    22nd of 78. Independent result from Epoch AI.

  • FrontierMath90.9%

    Hundreds of new, unpublished math problems written by mathematicians, from hard undergraduate level up to research, with answers a computer can check.

    5th of 76. Independent result from Epoch AI.

  • LMArena WebDev1,679

    People ask two anonymous models to build the same web page or app and vote for the better one.

    12th of 98. Independent result from LMArena.

  • HealthBench Professional62.7%

    Conversations in the style of real clinicians' chats with AI, graded against rubrics written by physicians.

    8th of 19. The maker's own number, from OpenAI, via LLM Stats.

  • HealthBench55.1%

    5,000 realistic health conversations with patients and clinicians, each graded against criteria written by 262 physicians.

    12th of 16. The maker's own number, from OpenAI, via LLM Stats.

  • LifeSci Diamond9.1%

    55 regulatory affairs tasks from drug and device makers, such as FDA and EMA submissions, labeling and compliance, with answer keys written or reviewed by practising specialists.

    3rd of 18. Independent result from Arca, via LLM Stats.

3 more results in its full profile.

Every result with its source, what it costs per task, what jumped with its release, side by side with any other model, and answers to your questions about when to use it.

Models ranked near it

How the rating works, and every benchmark it uses: the model leaderboard.