OpenAI
o3-deep-research-2025-06-26 model retirement
Stopped workingSubscribe to OpenAIShare
Model o3-deep-research-2025-06-26 was retired on July 23, 2026. Calls specifying this model snapshot fail since that date. The change affects all requests directed to this identifier.
The error you get
What OpenAI answers a call to o3-deep-research-2025-06-26 once the model is gone, as recorded from real responses:
{"error":{"message":"The model `o3-deep-research-2025-06-26` 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-deep-research-2025-06-26
Move to gpt-5.6-sol, which is recommended by OpenAI as the substitute model.
In OpenAI's words
Shutdown date: July 23, 2026; Model snapshot: o3-deep-research-2025-06-26 | o3-deep-research; Substitute model: gpt-5.6-sol
Facts
- API
- OpenAI
api.openai.com - Model
o3-deep-research-2025-06-26- Kind
- Model retirement
- Takes effect
- July 23, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
- Verified
- , against OpenAI's own pages
Questions
When does o3-deep-research-2025-06-26 shut down?
Calls to the model o3-deep-research-2025-06-26 on OpenAI stopped working on July 23, 2026.
What happens to calls after July 23, 2026?
They have failed since July 23, 2026.
What error does o3-deep-research-2025-06-26 return once it is shut down?
OpenAI answers HTTP 404: "The model `o3-deep-research-2025-06-26` has been deprecated, learn more here: https://platform.openai.com/docs/deprecations". Send another model to fix it.
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.
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You fixed this one by hand.
Okapi opens the pull request with the fix before the next breaking change reaches your code.