# gpt-4.1-nano-2025-04-14

Calls to the model gpt-4.1-nano-2025-04-14 on OpenAI stopped working on October 23, 2026.

On October 23, 2026, the model snapshot gpt-4.1-nano-2025-04-14 was retired and stopped working. API requests using model gpt-4.1-nano-2025-04-14 fail since that date.

## The error OpenAI returns once gpt-4.1-nano-2025-04-14 is gone

HTTP 404

```json
{"error":{"message":"The model `gpt-4.1-nano-2025-04-14` has been deprecated, learn more here: https://platform.openai.com/docs/deprecations","type":"invalid_request_error","param":null,"code":"model_not_found"}}
```

## What to use instead

Update your requests to use the substitute model gpt-5.6-luna as recommended by OpenAI.

- API: OpenAI (api.openai.com)
- Model: gpt-4.1-nano-2025-04-14
- Kind: Model retirement
- Takes effect: October 23, 2026
- Calls after that day: fail
- Calls it hits: `model gpt-4.1-nano-2025-04-14`
- Source: [Deprecations page](https://developers.openai.com/api/docs/deprecations)
- Verified: November 6, 2026, against OpenAI's own pages
- Page: https://www.okapi.bot/models/openai/gpt-4.1-nano-2025-04-14/

## OpenAI's words

> Shutdown date: October 23, 2026; Model snapshot: gpt-4.1-nano | gpt-4.1-nano-2025-04-14; Substitute model: gpt-5.6-luna

Okapi finds the calls this change hits in your repo and opens the pull request with the fix: https://github.com/apps/okapi-agent