# o3-pro

Calls to the model o3-pro on OpenAI stop working on December 11, 2026.

On December 11, 2026, the model o3-pro will be retired. Calls targeting model o3-pro will fail after that day. The shutdown also applies to o3-pro-2025-06-10.

## The error OpenAI returns once o3-pro is gone

HTTP 404

```json
{"error":{"message":"The model `o3-pro` 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 (reasoning.mode: pro), which is the recommended replacement.

- API: OpenAI (api.openai.com)
- Model: o3-pro
- Released: June 10, 2025 (models.dev)
- Kind: Model retirement
- Takes effect: December 11, 2026
- Calls after that day: fail
- Calls it hits: `model o3-pro`
- 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/o3-pro/

## OpenAI's words

> Shutdown date: Dec 11, 2026; Model / system: o3-pro | o3-pro-2025-06-10; Recommended replacement: gpt-5.6-sol ( reasoning.mode: pro )

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