OpenAI · Model retirement
o1
Stops working (tomorrow)
On October 23, 2026, the model o1 will be retired. Requests that target model o1 will fail after this date. Update any systems sending traffic to this identifier before the shutdown day.
What to use instead of o1
Move to gpt-5.6-sol, recommended by OpenAI.
Facts
- API
- OpenAI
api.openai.com - Model
o1- Kind
- Model retirement
- Takes effect
- October 23, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
o1 on other APIs
- Azure OpenAI Deprecated, no date
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