# o1-pro-2025-03-19

Calls to the model o1-pro-2025-03-19 on OpenAI stop working on October 23, 2026.

On October 23, 2026, the model o1-pro-2025-03-19 will be retired. Calls using model o1-pro-2025-03-19 will fail after this date. Update your integrations to prevent requests from failing.

- API: OpenAI (api.openai.com)
- Model: o1-pro-2025-03-19
- Kind: Model retirement
- Takes effect: October 23, 2026
- Calls after that day: fail
- Calls it hits: `model o1-pro-2025-03-19`
- Source: [Deprecations page](https://developers.openai.com/api/docs/deprecations)
- Page: https://www.okapi.bot/models/openai/o1-pro-2025-03-19/

## What to use instead

Move to gpt-5.6-sol (reasoning.mode: pro), recommended by OpenAI.