# gpt-4-turbo

Calls to the model gpt-4-turbo on OpenAI stopped working on October 23, 2026.

On October 23, 2026, OpenAI retired model gpt-4-turbo. Calls targeting this model fail since that date. The shutdown also covers snapshots gpt-4-turbo-2024-04-09 and gpt-4-turbo-completions.

## The error OpenAI returns once gpt-4-turbo is gone

HTTP 404

```json
{"error":{"message":"The model `gpt-4-turbo` 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

Move to gpt-5.6-sol, which OpenAI recommends as the substitute model.

- API: OpenAI (api.openai.com)
- Model: gpt-4-turbo
- Released: November 6, 2023 (models.dev)
- Kind: Model retirement
- Takes effect: October 23, 2026
- Calls after that day: fail
- Calls it hits: `model gpt-4-turbo`
- 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-turbo/

## OpenAI's words

> Shutdown date: October 23, 2026; Model snapshot: gpt-4-turbo | gpt-4-turbo-2024-04-09 , gpt-4-turbo-completions; Substitute model: gpt-5.6-sol

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