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What just changed?

New models, rollouts into products, new capabilities. Every change is backed by its source and dated by when it happened, not by when we wrote it down. Whether a statement still holds today is a separate check — where that is pending, it says “not verified”.

Last change recorded (yesterday)957 sourced entries · 166 source documents

202520262024-03: 2 sourced changes22024-06: 2 sourced changes22025-02: 2 sourced changes22025-05: 4 sourced changes42025-06: 1 sourced changes12025-08: 3 sourced changes32025-09: 2 sourced changes22025-10: 4 sourced changes42025-11: 2 sourced changes22026-01: 1 sourced changes12026-02: 5 sourced changes52026-04: 4 sourced changes42026-05: 1 sourced changes12026-06: 7 sourced changes72026-07: 1 sourced changes12026-08: 1 sourced changes12026-09: 5 sourced changes52026-10: 1 sourced changes1
Sourced changes per month · max 7Month of the time each update states (effective time).
1–48 of 48 changes

ModelsDeploymentProductCorrectionThe date is when it happened according to the source.

Also show 12 entries without movement (record-keeping, confirmations)

October 2026

  1. 9 days ago

    Claude Haiku 5.5 released

    ModelsAnthropic

    1platform.claude.com

September 2026

  1. 16 days ago

    Claude Sonnet 4.5 is being phased out

    ModelsAnthropicpreviously: Released

    1platform.claude.com
  2. 18 days ago

    Claude Sonnet 5.5 released

    ModelsAnthropic

    1platform.claude.com
  3. 24 days agoadded to the record on 30 Sept 2026

    Claude Opus 5.5 released

    ModelsAnthropic

    1platform.claude.com
  4. 45 days agoadded to the record on 11 Oct 2026

    Claude Mythos 5.1 released

    ModelsAnthropic

    1platform.claude.com
  5. 45 days agoadded to the record on 30 Sept 2026

    Claude Fable 5.1 released

    ModelsAnthropic

    1platform.claude.com

August 2026

  1. 2 months agoadded to the record on 29 Sept 2026

    Claude Opus 4.1 retired

    ModelsAnthropicpreviously: Deprecated

    1platform.claude.com

July 2026

  1. 2 months agoadded to the record on 30 Sept 2026

    Claude Opus 5 released

    ModelsAnthropic

    1platform.claude.com

June 2026

  1. 3 months agoadded to the record on 30 Sept 2026

    Claude Sonnet 5 released

    ModelsAnthropic

    1platform.claude.com
  2. 4 months agoadded to the record on 29 Sept 2026

    Claude Sonnet 4 retired

    ModelsAnthropicpreviously: Deprecated

    1platform.claude.com
  3. 4 months agoadded to the record on 29 Sept 2026

    Claude Opus 4 retired

    ModelsAnthropicpreviously: Deprecated

    1platform.claude.com
  4. 4 months agoadded to the record on 11 Oct 2026

    Claude Mythos 5 released

    ModelsAnthropic

    1platform.claude.com
  5. 4 months agoadded to the record on 3 Oct 2026

    Claude Mythos Preview is being phased out

    ModelsAnthropic

    1platform.claude.com
  6. 4 months agoadded to the record on 30 Sept 2026

    Claude Fable 5 released

    ModelsAnthropic

    1platform.claude.com
  7. 4 months agoadded to the record on 29 Sept 2026

    Claude Opus 4.1 is being phased out

    ModelsAnthropicpreviously: Released

    1platform.claude.com

May 2026

  1. 4 months agoadded to the record on 30 Sept 2026

    Claude Opus 4.8 released

    ModelsAnthropic

    1platform.claude.com

April 2026

  1. 6 months agoadded to the record on 29 Sept 2026

    Claude Opus 4.7 released

    ModelsAnthropic

    1www.anthropic.com
  2. 6 months agoadded to the record on 29 Sept 2026

    Claude Opus 4.7 announced

    ModelsAnthropic

    1www.anthropic.com
  3. 6 months agoadded to the record on 29 Sept 2026

    Claude Sonnet 4 is being phased out

    ModelsAnthropicpreviously: Released

    1platform.claude.com
  4. 6 months agoadded to the record on 29 Sept 2026

    Claude Opus 4 is being phased out

    ModelsAnthropicpreviously: Released

    1platform.claude.com

February 2026

  1. 7 months agoadded to the record on 29 Sept 2026

    Claude 3.7 Sonnet retired

    ModelsAnthropicpreviously: Deprecated

    1platform.claude.com
  2. 8 months agoadded to the record on 29 Sept 2026

    Claude Sonnet 4.6 released

    ModelsAnthropic

    1www.anthropic.com
  3. 8 months agoadded to the record on 29 Sept 2026

    Claude Sonnet 4.6 announced

    ModelsAnthropic

    1www.anthropic.com
  4. 8 months agoadded to the record on 29 Sept 2026

    Claude Opus 4.6 released

    ModelsAnthropic

    1www.anthropic.com
  5. 8 months agoadded to the record on 29 Sept 2026

    Claude Opus 4.6 announced

    ModelsAnthropic

    1www.anthropic.com

January 2026

  1. 9 months agoadded to the record on 29 Sept 2026

    Claude 3 Opus retired

    ModelsAnthropicpreviously: Deprecated

    1platform.claude.com

November 2025

  1. 10 months agoadded to the record on 29 Sept 2026

    Claude Opus 4.5 released

    ModelsAnthropic

    1www.anthropic.com
  2. 10 months agoadded to the record on 29 Sept 2026

    Claude Opus 4.5 announced

    ModelsAnthropic

    1www.anthropic.com

October 2025

  1. 11 months agoadded to the record on 29 Sept 2026

    Claude 3.5 Sonnet retired

    ModelsAnthropicpreviously: Deprecated

    1platform.claude.com
  2. 11 months agoadded to the record on 29 Sept 2026

    Claude 3.7 Sonnet is being phased out

    ModelsAnthropicpreviously: Released

    1platform.claude.com
  3. 12 months agoadded to the record on 29 Sept 2026

    Claude Haiku 4.5 released

    ModelsAnthropic

    1www.anthropic.com
  4. 12 months agoadded to the record on 29 Sept 2026

    Claude Haiku 4.5 announced

    ModelsAnthropic

    1www.anthropic.com

September 2025

  1. 12 months agoadded to the record on 29 Sept 2026

    Claude Sonnet 4.5 released

    ModelsAnthropic

    1www.anthropic.com
  2. 12 months agoadded to the record on 29 Sept 2026

    Claude Sonnet 4.5 announced

    ModelsAnthropic

    1www.anthropic.com

August 2025

  1. 14 months agoadded to the record on 29 Sept 2026

    Claude 3.5 Sonnet is being phased out

    ModelsAnthropicpreviously: Released

    1platform.claude.com
  2. 14 months agoadded to the record on 29 Sept 2026

    Claude Opus 4.1 released

    ModelsAnthropic

    1www.anthropic.com
  3. 14 months agoadded to the record on 29 Sept 2026

    Claude Opus 4.1 announced

    ModelsAnthropic

    1www.anthropic.com

June 2025

  1. 15 months agoadded to the record on 29 Sept 2026

    Claude 3 Opus is being phased out

    ModelsAnthropicpreviously: Released

    1platform.claude.com

May 2025

  1. 17 months agoadded to the record on 29 Sept 2026

    Claude Sonnet 4 released

    ModelsAnthropic

    1www.anthropic.com
  2. 17 months agoadded to the record on 29 Sept 2026

    Claude Opus 4 released

    ModelsAnthropic

    1www.anthropic.com
  3. 17 months agoadded to the record on 29 Sept 2026

    Claude Sonnet 4 announced

    ModelsAnthropic

    1www.anthropic.com
  4. 17 months agoadded to the record on 29 Sept 2026

    Claude Opus 4 announced

    ModelsAnthropic

    1www.anthropic.com

February 2025

  1. 19 months agoadded to the record on 29 Sept 2026

    Claude 3.7 Sonnet released

    ModelsAnthropic

    1www.anthropic.com
  2. 19 months agoadded to the record on 29 Sept 2026

    Claude 3.7 Sonnet announced

    ModelsAnthropic

    1www.anthropic.com

June 2024

  1. 2 years agoadded to the record on 29 Sept 2026

    Claude 3.5 Sonnet released

    ModelsAnthropic

    1www.anthropic.com
  2. 2 years agoadded to the record on 29 Sept 2026

    Claude 3.5 Sonnet announced

    ModelsAnthropic

    1www.anthropic.com

March 2024

  1. 2 years agoadded to the record on 29 Sept 2026

    Claude 3 Opus released

    ModelsAnthropic

    1www.anthropic.com
  2. 2 years agoadded to the record on 29 Sept 2026

    Claude 3 Opus announced

    ModelsAnthropic

    1www.anthropic.com