# gpt-5.1-codex — AI model deprecation and retirement dates by provider

For gpt-5.1-codex, provider is OpenAI; lifecycle status is Retired; deprecation announced is April 22, 2026; shutdown / retirement date is July 23, 2026; recommended replacement is gpt-5.6-sol, recorded from its source on 2026-08-12.

- **Provider:** OpenAI _(verified: appears in the quote below)_
- **Model ID / API name:** gpt-5.1-codex _(verified: appears in the quote below)_
- **Lifecycle status:** Retired
- **Deprecation announced:** April 22, 2026 _(verified: appears in the quote below)_
- **Shutdown / retirement date:** July 23, 2026 _(verified: appears in the quote below)_
- **Recommended replacement:** gpt-5.6-sol _(verified: appears in the quote below)_
- **Human-readable model name:** gpt-5.1-codex _(per learn.microsoft.com, not stated by the source above)_
- **Platform / deployment scope:** Azure / Microsoft Foundry _(per learn.microsoft.com, not stated by the source above)_

## What the source says

> Legacy GPT model snapshots (July 2026 shutdown) On April 22, 2026, we announced the deprecation of the following older OpenAI models. Access to these models was shut down on July 23, 2026. Shutdown date | Model snapshot | Substitute model | July 23, 2026 | computer-use-preview-2025-03-11 | computer-use-preview | gpt-5.6-terra | July 23, 2026 | gpt-4o-mini-search-preview-2025-03-11 | gpt-5.6-terra | July 23, 2026 | gpt-4o-search-preview-2025-03-11 | gpt-5.6-terra | July 23, 2026 | gpt-5-chat-latest | gpt-5.6-sol | July 23, 2026 | gpt-5-codex | gpt-5.6-sol | July 23, 2026 | gpt-5.1-chat-latest | gpt-5.6-sol | July 23, 2026 | gpt-5.1-codex | gpt-5.6-sol |

## Sources disagree

More than one authority states this, and they do not state the same
thing. Both are reproduced with the source each came from.

### Provider

platform.openai.com says provider is **OpenAI**, as of 2026-08-12.

> Legacy GPT model snapshots (July 2026 shutdown) On April 22, 2026, we announced the deprecation of the following older OpenAI models. Access to these models was shut down on July 23, 2026. Shutdown date | Model snapshot | Substitute model | July 23, 2026 | computer-use-preview-2025-03-11 | computer-use-preview | gpt-5.6-terra | July 23, 2026 | gpt-4o-mini-search-preview-2025-03-11 | gpt-5.6-terra | July 23, 2026 | gpt-4o-search-preview-2025-03-11 | gpt-5.6-terra | July 23, 2026 | gpt-5-chat-latest | gpt-5.6-sol | July 23, 2026 | gpt-5-codex | gpt-5.6-sol | July 23, 2026 | gpt-5.1-chat-latest | gpt-5.6-sol | July 23, 2026 | gpt-5.1-codex | gpt-5.6-sol |

Source: https://platform.openai.com/docs/deprecations

learn.microsoft.com says provider is **Microsoft Azure / Foundry**, as of 2026-08-12.

> gpt-5.1-codex | 2025-11-13 | GA | 2027-05-15 |

Source: https://learn.microsoft.com/en-us/azure/foundry/openai/concepts/model-retirement-schedule


### Lifecycle status

platform.openai.com says lifecycle status is **Retired**, as of 2026-08-12.

> Legacy GPT model snapshots (July 2026 shutdown) On April 22, 2026, we announced the deprecation of the following older OpenAI models. Access to these models was shut down on July 23, 2026. Shutdown date | Model snapshot | Substitute model | July 23, 2026 | computer-use-preview-2025-03-11 | computer-use-preview | gpt-5.6-terra | July 23, 2026 | gpt-4o-mini-search-preview-2025-03-11 | gpt-5.6-terra | July 23, 2026 | gpt-4o-search-preview-2025-03-11 | gpt-5.6-terra | July 23, 2026 | gpt-5-chat-latest | gpt-5.6-sol | July 23, 2026 | gpt-5-codex | gpt-5.6-sol | July 23, 2026 | gpt-5.1-chat-latest | gpt-5.6-sol | July 23, 2026 | gpt-5.1-codex | gpt-5.6-sol |

Source: https://platform.openai.com/docs/deprecations

learn.microsoft.com says lifecycle status is **GA**, as of 2026-08-12.

> gpt-5.1-codex | 2025-11-13 | GA | 2027-05-15 |

Source: https://learn.microsoft.com/en-us/azure/foundry/openai/concepts/model-retirement-schedule


### Shutdown / retirement date

platform.openai.com says shutdown / retirement date is **July 23, 2026**, as of 2026-08-12.

> Legacy GPT model snapshots (July 2026 shutdown) On April 22, 2026, we announced the deprecation of the following older OpenAI models. Access to these models was shut down on July 23, 2026. Shutdown date | Model snapshot | Substitute model | July 23, 2026 | computer-use-preview-2025-03-11 | computer-use-preview | gpt-5.6-terra | July 23, 2026 | gpt-4o-mini-search-preview-2025-03-11 | gpt-5.6-terra | July 23, 2026 | gpt-4o-search-preview-2025-03-11 | gpt-5.6-terra | July 23, 2026 | gpt-5-chat-latest | gpt-5.6-sol | July 23, 2026 | gpt-5-codex | gpt-5.6-sol | July 23, 2026 | gpt-5.1-chat-latest | gpt-5.6-sol | July 23, 2026 | gpt-5.1-codex | gpt-5.6-sol |

Source: https://platform.openai.com/docs/deprecations

learn.microsoft.com says shutdown / retirement date is **2027-05-15**, as of 2026-08-12.

> gpt-5.1-codex | 2025-11-13 | GA | 2027-05-15 |

Source: https://learn.microsoft.com/en-us/azure/foundry/openai/concepts/model-retirement-schedule


## Source

- https://platform.openai.com/docs/deprecations
- https://learn.microsoft.com/en-us/azure/foundry/openai/concepts/model-retirement-schedule

Last verified: 2026-08-12. Review by: 2026-09-11.
Part of [AI model deprecation and retirement dates by provider](https://referencesource.org/ai-model-deprecation-and-retirement/).