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Anthropic

The Claude family

Anthropic's Claude models, told apart by tier names such as Opus and Sonnet and by version number.

Only versions we have a record for. Missing ones appear as records are added.

20versions2023–2026Latest · Claude Haiku 5.5

At a glance

The Claude family — 20 versionsEach Claude version from 2023 to 2026 as a dot, in release order. The list below has the same information.Main lineClaude · Mar 14, 2023Claude 2 · Jul 11, 2023Claude Instant 1.2 · Aug 9, 2023Claude 2.1 · Nov 21, 2023Claude 3 · Mar 4, 2024Claude 3.5 Sonnet · Jun 20, 2024Claude 3.5 Haiku / upgraded 3.5 Sonnet · Oct 22, 2024Claude 3.7 Sonnet · Feb 24, 2025Claude Opus 4 / Sonnet 4 · May 22, 2025Claude Opus 4.1 · Aug 5, 2025Claude Sonnet 4.5 · Sep 29, 2025Claude Haiku 4.5 · Oct 15, 2025Claude Opus 4.5 · Nov 24, 2025Claude Opus 4.6 · Feb 5, 2026Claude Sonnet 4.6 · Feb 17, 2026Claude Opus 4.7 · Apr 16, 2026Claude Fable 5.1 / Claude Mythos 5.1 · Sep 1, 2026Claude Opus 5.5 · Sep 22, 2026Claude Sonnet 5.5 · Sep 28, 2026Claude Haiku 5.5 · Oct 7, 2026
Where labels would overlap, only the dot is drawn — point at it to see the name; every version is in the list below.

20 versions

In release order. Each date comes from the record that documents it — open a name to see the record.

  1. Claude

    Launched to the public the same day as GPT-4

    Text

  2. Claude 2

    Released together with the claude.ai website

    Text

  3. Claude Instant 1.2

    Updated the fast, low-cost light model

    TextSmall

  4. Claude 2.1

    Released with a 200K-token context window

    Text

  5. Claude 3

    Brought three tiers — Haiku, Sonnet, Opus — and image input

    Multimodal

  6. Claude 3.5 Sonnet

    First 3.5 model, launched with Artifacts

    Multimodal

  7. Claude 3.5 Haiku / upgraded 3.5 Sonnet

    Released alongside computer use (beta)

    Multimodal

  8. Claude 3.7 Sonnet

    Hybrid reasoning model with an adjustable thinking budget

    Reasoning

  9. Claude Opus 4 / Sonnet 4

    Fourth generation, combining instant answers and extended thinking

    Reasoning

  10. Claude Opus 4.1

    Improved Opus 4 on coding and agent tasks

    Reasoning

  11. Claude Sonnet 4.5

    A Sonnet with higher coding and computer-use scores

    Reasoning

  12. Claude Haiku 4.5

    The small model of the 4.5 generation

    ReasoningSmall

  13. Claude Opus 4.5

    Cut the price sharply and added an effort setting

    Reasoning

  14. Claude Opus 4.6

    System card notes it tells evaluations from real use

    Text

  15. Claude Sonnet 4.6

    Released with a 1M-token context window (beta)

    Reasoning

  16. Claude Opus 4.7

    Higher-resolution vision for dense screenshots

    Multimodal

  17. Claude Fable 5.1 / Claude Mythos 5.1

    Mythos 5.1 is offered only to vetted users

    Reasoning

  18. Claude Opus 5.5

    Update claiming gains at a lower price than Opus 5

    Reasoning

  19. Claude Sonnet 5.5

    Mid tier the company says comes close to Opus 5.5

    Reasoning

  20. Claude Haiku 5.5

    Fastest small tier; the company says about 75% cheaper on average than Haiku 4.5

    Latest