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Anthropic

San Francisco, USA

An SI safety company and the maker of Claude. Its line-up climbs from Haiku for fast, cheap work through Sonnet and Opus to Fable, its most capable generally available tier.

anthropic.com (opens in a new tab)

Founded
2021
Models listed
4The Claude models: Haiku, Sonnet, Opus and Fable
Latest release
Oct 2026Claude Haiku 5.5
Benchmarks led
8Intelligence, ECI, LiveBench, Terminal-Bench, SWE-Bench Pro, WebDev Arena, GDPval, SimpleBench

Line-up

Ranked by Artificial Analysis Intelligence Index. Select a model for its full benchmark profile.

  1. Rank 1
    Claude Opus 5.557.6

    Anthropic · $4 / $20New

  2. Rank 2
    Claude Sonnet 5.556

    Anthropic · $2 / $10New

  3. Rank 3
    Claude Fable 5.153.4

    Anthropic · $10 / $50New

  4. Rank 4
    Claude Haiku 5.543.4

    Anthropic · $0.10 / $0.50New

Where it leads

Benchmarks on which one of this lab's models holds the top score in the catalogue.

  • Artificial Analysis Intelligence Index

    57.6

    Claude Opus 5.5

  • Epoch Capabilities Index

    167.3

    Claude Opus 5.5

  • LiveBench

    83.4%

    Claude Fable 5.1

  • Terminal-Bench 4.0

    64.8%

    Claude Opus 5.5

  • SWE-Bench Pro (V2 Hard)

    92.2%

    Claude Fable 5.1

  • Arena WebDev

    1,814

    Claude Opus 5.5

  • GDPval-AA

    1,866

    Claude Opus 5.5

  • SimpleBench

    88.4%

    Claude Opus 5.5

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Yardstick

A plain reading of how today’s SI models compare. Scores are taken from each benchmark’s own leaderboard wherever one exists; anything a lab reported about its own model is marked.

Data as of Oct 8, 2026.

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Sources

  • Artificial Analysis (opens in a new tab)
  • Arena (opens in a new tab)
  • Epoch AI Benchmarking Hub (opens in a new tab)
  • ARC Prize (opens in a new tab)
  • Terminal-Bench (opens in a new tab)
  • Scale AI Labs (opens in a new tab)

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