OpenAI
o4-mini-2025-04-16 model retirement
Stopped workingSubscribe to OpenAIShare
Requests using model o4-mini-2025-04-16 fail since October 23, 2026. OpenAI shut down this snapshot on that date, and any further calls specifying this identifier are no longer served.
The error you get
What OpenAI answers a call to o4-mini-2025-04-16 once the model is gone, as recorded from real responses:
{"error":{"message":"The model `o4-mini-2025-04-16` 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 o4-mini-2025-04-16
Move to gpt-5.6-terra, recommended by OpenAI.
In OpenAI's words
Shutdown date: October 23, 2026; Model snapshot: o4-mini-2025-04-16 | o4-mini; Substitute model: gpt-5.6-terra
Facts
- API
- OpenAI
api.openai.com - Model
o4-mini-2025-04-16- 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 o4-mini-2025-04-16 shut down?
Calls to the model o4-mini-2025-04-16 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 o4-mini-2025-04-16 return once it is shut down?
OpenAI answers HTTP 404: "The model `o4-mini-2025-04-16` 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.
More from OpenAI 10
-
ft-babbage-002Model retirement Stopped working -
ft-davinci-002Model retirement Stopped working -
ft-gpt-3.5-turboModel retirement Stopped working -
ft-gpt-4Model retirement Stopped working -
ft-gpt-4.1-nanoModel retirement Stopped working -
ft-gpt-4.1-nano-2025-04-14Model retirement Stopped working -
ft-o4-miniModel retirement Stopped working -
ft-o4-mini-2025-04-16Model retirement Stopped working -
gpt-3.5-turboModel retirement Stopped working -
gpt-3.5-turbo-0125Model retirement Stopped working
You fixed this one by hand.
Okapi opens the pull request with the fix before the next breaking change reaches your code.