OpenAI
gpt-4.1 model retirement
Stops workingSubscribe to OpenAIShare
On January 14, 2027, the gpt-4.1 model will be shut down. Requests specifying model gpt-4.1 will fail after this date. This retirement also applies to gpt-4.1-2025-04-14.
The error you get from January 14, 2027
What OpenAI answers a call to gpt-4.1 once the model is gone, as recorded from real responses:
{"error":{"message":"The model `gpt-4.1` 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-4.1
Move to gpt-6-luna, which is the recommended replacement from OpenAI.
In OpenAI's words
Shutdown date: January 14, 2027; Model / system: GPT-4.1 ( gpt-4.1-2025-04-14 ); Recommended replacement: gpt-6-luna
Facts
- API
- OpenAI
api.openai.com - Model
gpt-4.1- Released
- April 14, 2025 (models.dev)
- Kind
- Model retirement
- Takes effect
- January 14, 2027
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
- Verified
- , against OpenAI's own pages
Questions
When does gpt-4.1 shut down?
Calls to the model gpt-4.1 on OpenAI stop working on January 14, 2027.
What happens to calls after January 14, 2027?
They fail from that day.
What error does gpt-4.1 return once it is shut down?
OpenAI answers HTTP 404: "The model `gpt-4.1` has been deprecated, learn more here: https://platform.openai.com/docs/deprecations". Send another model to fix it.
When was gpt-4.1 released?
gpt-4.1 was released on April 14, 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.
gpt-4.1 on other APIs 2
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Azure AI Foundry
gpt-4.1Model retirement Stops workingin 159 days -
Azure OpenAI
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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 January 14, 2027.