# gpt-4.1-nano — AI model deprecation and retirement dates by provider

For gpt-4.1-nano, provider is OpenAI; lifecycle status is Deprecated; deprecation announced is April 22, 2026; shutdown / retirement date is October 23, 2026; recommended replacement is gpt-5.6-luna, recorded from its source on 2026-08-12.

- **Provider:** OpenAI _(verified: appears in the quote below)_
- **Model ID / API name:** gpt-4.1-nano _(verified: appears in the quote below)_
- **Lifecycle status:** Deprecated _(verified: appears in the quote below)_
- **Deprecation announced:** April 22, 2026
- **Shutdown / retirement date:** October 23, 2026 _(verified: appears in the quote below)_
- **Recommended replacement:** gpt-5.6-luna _(verified: appears in the quote below)_
- **Human-readable model name:** gpt-4.1-nano _(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

> Inference on fine-tuned models will be disabled only when the underlying base model is deprecated. | 2026-04-22: Legacy GPT model snapshots To improve reliability and make it easier for developers to choose the right models, we are deprecating a set of older OpenAI models. Access to these models will be shut down on the dates below. Shutdown date | Model snapshot | Substitute model | October 23, 2026 | gpt-3.5-turbo-0125 | gpt-3.5-turbo , gpt-3.5-turbo-completions | gpt-5.6-terra | October 23, 2026 | gpt-4-0613 | gpt-4 , gpt-4-0613-completions , gpt-4-completions | gpt-5.6-sol | October 23, 2026 | gpt-4-1106-preview | gpt-5.6-sol | October 23, 2026 | gpt-4-turbo | gpt-4-turbo-2024-04-09 , gpt-4-turbo-completions | gpt-5.6-sol | October 23, 2026 | gpt-4.1-nano | gpt-4.1-nano-2025-04-14 | gpt-5.6-luna |

## 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.

> Inference on fine-tuned models will be disabled only when the underlying base model is deprecated. | 2026-04-22: Legacy GPT model snapshots To improve reliability and make it easier for developers to choose the right models, we are deprecating a set of older OpenAI models. Access to these models will be shut down on the dates below. Shutdown date | Model snapshot | Substitute model | October 23, 2026 | gpt-3.5-turbo-0125 | gpt-3.5-turbo , gpt-3.5-turbo-completions | gpt-5.6-terra | October 23, 2026 | gpt-4-0613 | gpt-4 , gpt-4-0613-completions , gpt-4-completions | gpt-5.6-sol | October 23, 2026 | gpt-4-1106-preview | gpt-5.6-sol | October 23, 2026 | gpt-4-turbo | gpt-4-turbo-2024-04-09 , gpt-4-turbo-completions | gpt-5.6-sol | October 23, 2026 | gpt-4.1-nano | gpt-4.1-nano-2025-04-14 | gpt-5.6-luna |

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

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

> gpt-4.1-nano | 2025-04-14 | Deprecated | 2026-10-14 |

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 **October 23, 2026**, as of 2026-08-12.

> Inference on fine-tuned models will be disabled only when the underlying base model is deprecated. | 2026-04-22: Legacy GPT model snapshots To improve reliability and make it easier for developers to choose the right models, we are deprecating a set of older OpenAI models. Access to these models will be shut down on the dates below. Shutdown date | Model snapshot | Substitute model | October 23, 2026 | gpt-3.5-turbo-0125 | gpt-3.5-turbo , gpt-3.5-turbo-completions | gpt-5.6-terra | October 23, 2026 | gpt-4-0613 | gpt-4 , gpt-4-0613-completions , gpt-4-completions | gpt-5.6-sol | October 23, 2026 | gpt-4-1106-preview | gpt-5.6-sol | October 23, 2026 | gpt-4-turbo | gpt-4-turbo-2024-04-09 , gpt-4-turbo-completions | gpt-5.6-sol | October 23, 2026 | gpt-4.1-nano | gpt-4.1-nano-2025-04-14 | gpt-5.6-luna |

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

learn.microsoft.com says shutdown / retirement date is **2026-10-14**, as of 2026-08-12.

> gpt-4.1-nano | 2025-04-14 | Deprecated | 2026-10-14 |

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/).