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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

202520262024-05: 2 sourced changes22025-02: 3 sourced changes32025-04: 6 sourced changes62025-05: 1 sourced changes12025-07: 1 sourced changes12025-08: 6 sourced changes62025-09: 1 sourced changes12025-10: 2 sourced changes22025-11: 1 sourced changes12025-12: 3 sourced changes32026-02: 3 sourced changes32026-03: 6 sourced changes62026-04: 7 sourced changes72026-05: 3 sourced changes32026-06: 3 sourced changes32026-07: 8 sourced changes82026-08: 4 sourced changes42026-09: 11 sourced changes112026-10: 14 sourced changes14
Sourced changes per month · max 14Month of the time each update states (effective time).
Entries 301–344 of 344

ModelsDeploymentProductRecordCorrectionThe date is when it happened according to the source.

Show movement only

Every entry is shown — also record-keeping (a documented model identity, a state a source check found in place) and confirmations (checks that found an existing state unchanged). Neither means something happened that day.

April 2026

  1. 5 months agoadded to the record on 30 Sept 2026

    GPT-5.5 Pro released

    ModelsOpenAI

    1developers.openai.com
  2. 5 months agoadded to the record on 29 Sept 2026

    GPT-5.5 released

    ModelsOpenAI

    1learn.chatgpt.com
  3. 5 months agoadded to the record on 29 Sept 2026

    GPT-5.5 announced

    ModelsOpenAI

    1learn.chatgpt.com
  4. 5 months agoadded to the record on 7 Oct 2026

    o4-mini is being phased out

    ModelsOpenAI

    1developers.openai.com
  5. 5 months agoadded to the record on 7 Oct 2026

    o3-mini is being phased out

    ModelsOpenAI

    1developers.openai.com
  6. 5 months agoadded to the record on 11 Oct 2026

    GPT-Image-2 released

    ModelsImage & DesignOpenAI

    1developers.openai.com
  7. 6 months agoadded to the record on 3 Oct 2026

    GPT-5.1 removed from GitHub Copilot

    DeploymentOpenAI

    1docs.github.com

March 2026

  1. 7 months agoadded to the record on 30 Sept 2026

    GPT-5.4 nano released

    ModelsOpenAI

    1developers.openai.com
  2. 7 months agoadded to the record on 30 Sept 2026

    GPT-5.4 mini released

    ModelsOpenAI

    1developers.openai.com
  3. 7 months agoadded to the record on 29 Sept 2026

    GPT-5.4 is rolling out in Microsoft 365 Copilot — as reported then; current state not verified

    DeploymentOpenAI

    1techcommunity.microsoft.com
  4. 7 months agoadded to the record on 30 Sept 2026

    GPT-5.4 Pro released

    ModelsOpenAI

    1developers.openai.com
  5. 7 months agoadded to the record on 29 Sept 2026

    GPT-5.4 released

    ModelsOpenAI

    1developers.openai.com
  6. 7 months agoadded to the record on 29 Sept 2026

    GPT-5.4 announced

    ModelsOpenAI

    1developers.openai.com

February 2026

  1. 7 months agoadded to the record on 11 Oct 2026

    GPT-Realtime-1.5 released

    ModelsSpeech & AudioOpenAI

    1developers.openai.com
  2. 7 months agoadded to the record on 11 Oct 2026

    GPT-Audio-1.5 released

    ModelsSpeech & AudioOpenAI

    1developers.openai.com
  3. 8 months agoadded to the record on 29 Sept 2026

    GPT-5 removed from GitHub Copilot

    DeploymentOpenAIpreviously: available

    1docs.github.com

December 2025

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

    GPT-5.2 is rolling out in Microsoft 365 Copilot — as reported then; current state not verified

    DeploymentOpenAI

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

    GPT-5.2 released

    ModelsOpenAI

    1developers.openai.com
  3. 10 months agoadded to the record on 29 Sept 2026

    GPT-5.2 announced

    ModelsOpenAI

    1developers.openai.com

November 2025

  1. 11 months agoadded to the record on 30 Sept 2026

    GPT-5.1 released

    ModelsOpenAI

    1developers.openai.com

October 2025

  1. 11 months agoadded to the record on 3 Oct 2026

    o3 removed from GitHub Copilot

    DeploymentOpenAI

    1docs.github.com
  2. 11 months agoadded to the record on 29 Sept 2026

    o3 removed from GitHub Copilot — as reported then; current state not verified

    DeploymentOpenAIpreviously: limited availabilityApplies to: Enterprise

    1github.blog
  3. 12 months agoadded to the record on 30 Sept 2026

    GPT-5 Pro released

    ModelsOpenAI

    1developers.openai.com

September 2025

  1. 13 months agoadded to the record on 29 Sept 2026

    GPT-5 is now available in GitHub Copilot

    DeploymentOpenAIpreviously: limited availability

    1github.blog

August 2025

  1. 14 months agoadded to the record on 30 Sept 2026

    GPT-5 nano released

    ModelsOpenAI

    1developers.openai.com
  2. 14 months agoadded to the record on 30 Sept 2026

    GPT-5 mini released

    ModelsOpenAI

    1developers.openai.com
  3. 14 months agoadded to the record on 29 Sept 2026

    GPT-5 is now available in Microsoft 365 Copilot — as reported then; current state not verified

    DeploymentOpenAI

    1www.microsoft.com
  4. 14 months agoadded to the record on 29 Sept 2026

    GPT-5 is available in GitHub Copilot with limits

    DeploymentOpenAI

    1github.blog
  5. 14 months agoadded to the record on 29 Sept 2026

    GPT-5 released

    ModelsOpenAI

    1developers.openai.com
  6. 14 months agoadded to the record on 29 Sept 2026

    GPT-5 announced

    ModelsOpenAI

    1developers.openai.com
  7. 14 months agoadded to the record on 29 Sept 2026

    GPT-4o removed from GitHub Copilot — as reported then; current state not verified

    DeploymentOpenAI

    1github.blog

July 2025

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

    GPT-4.5 retired

    ModelsOpenAIpreviously: Deprecated

    1developers.openai.com

May 2025

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

    GPT-4.1 is now available in GitHub Copilot

    DeploymentOpenAI

    1github.blog

April 2025

  1. 18 months agoadded to the record on 29 Sept 2026

    o3 is available in GitHub Copilot with limits

    DeploymentOpenAIApplies to: Enterprise

    1github.blog
  2. 18 months agoadded to the record on 29 Sept 2026

    o3 released

    ModelsOpenAI

    1developers.openai.com
  3. 18 months agoadded to the record on 29 Sept 2026

    o3 announced

    ModelsOpenAI

    1developers.openai.com
  4. 18 months agoadded to the record on 29 Sept 2026

    GPT-4.5 is being phased out

    ModelsOpenAIpreviously: Released

    1developers.openai.com
  5. 18 months agoadded to the record on 29 Sept 2026

    GPT-4.1 released

    ModelsOpenAI

    1developers.openai.com
  6. 18 months agoadded to the record on 29 Sept 2026

    GPT-4.1 announced

    ModelsOpenAI

    1developers.openai.com

February 2025

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

    GPT-4.5 is available in GitHub Copilot with limits — as reported then; current state not verified

    DeploymentOpenAIApplies to: Enterprise

    1github.blog
  2. 19 months agoadded to the record on 29 Sept 2026

    GPT-4.5 released

    ModelsOpenAI

    1developers.openai.com
  3. 19 months agoadded to the record on 29 Sept 2026

    GPT-4.5 announced

    ModelsOpenAI

    1developers.openai.com

May 2024

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

    GPT-4o released

    ModelsOpenAI

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

    GPT-4o announced

    ModelsOpenAI

    1developers.openai.com