OpenAI · Model retirement
o1-pro-2025-03-19
Stops working (tomorrow)
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.
What to use instead of o1-pro-2025-03-19
Move to gpt-5.6-sol (reasoning.mode: pro), recommended by OpenAI.
Facts
- API
- OpenAI
api.openai.com - Model
o1-pro-2025-03-19- Kind
- Model retirement
- Takes effect
- October 23, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
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