OpenAI
o3-pro model retirement
Stops workingSubscribe to OpenAIShare
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 you get from December 11, 2026
What OpenAI answers a call to o3-pro once the model is gone, as recorded from real responses:
{"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 of o3-pro
Move to gpt-5.6-sol (reasoning.mode: pro), which is the recommended replacement.
In 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 )
Facts
- 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
- Source
- Deprecations page
- Last updated
- Verified
- , against OpenAI's own pages
Questions
When does o3-pro shut down?
Calls to the model o3-pro on OpenAI stop working on December 11, 2026.
What happens to calls after December 11, 2026?
They fail from that day.
What error does o3-pro return once it is shut down?
OpenAI answers HTTP 404: "The model `o3-pro` has been deprecated, learn more here: https://platform.openai.com/docs/deprecations". Send another model to fix it.
When was o3-pro released?
o3-pro was released on June 10, 2025, according to models.dev.
How do I find the calls this hits in my code?
Okapi reads your repository, finds the calls this change hits and opens a pull request with the fix. It never commits to your branches: every change comes as a pull request you review.
o3-pro on other APIs 1
-
Azure AI Foundry
o3-proModel retirement Stops workingin 13 days
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Is your code calling this?
Okapi finds the calls this change hits in your repo and opens the pull request with the fix before December 11, 2026.