OpenAI
gpt-4-turbo model retirement
Stopped workingSubscribe to OpenAIShare
On October 23, 2026, OpenAI retired model gpt-4-turbo. Calls targeting this model fail since that date. The shutdown also covers snapshots gpt-4-turbo-2024-04-09 and gpt-4-turbo-completions.
The error you get
What OpenAI answers a call to gpt-4-turbo once the model is gone, as recorded from real responses:
{"error":{"message":"The model `gpt-4-turbo` 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 gpt-4-turbo
Move to gpt-5.6-sol, which OpenAI recommends as the substitute model.
In OpenAI's words
Shutdown date: October 23, 2026; Model snapshot: gpt-4-turbo | gpt-4-turbo-2024-04-09 , gpt-4-turbo-completions; Substitute model: gpt-5.6-sol
Facts
- API
- OpenAI
api.openai.com - Model
gpt-4-turbo- Released
- November 6, 2023 (models.dev)
- Kind
- Model retirement
- Takes effect
- October 23, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
- Verified
- , against OpenAI's own pages
Questions
When does gpt-4-turbo shut down?
Calls to the model gpt-4-turbo on OpenAI stopped working on October 23, 2026.
What happens to calls after October 23, 2026?
They have failed since October 23, 2026.
What error does gpt-4-turbo return once it is shut down?
OpenAI answers HTTP 404: "The model `gpt-4-turbo` has been deprecated, learn more here: https://platform.openai.com/docs/deprecations". Send another model to fix it.
When was gpt-4-turbo released?
gpt-4-turbo was released on November 6, 2023, 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.
gpt-4-turbo on other APIs 2
-
No date
Azure AI Foundry
gpt-4-turboModel retirement Deprecated, no date -
No date
Azure OpenAI
gpt-4-turboModel retirement Deprecated, no date
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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.