OpenAI
babbage-002 model retirement
Stopped workingSubscribe to OpenAIShare
On September 28, 2026, the model babbage-002 was shut down and stopped working. API calls specifying model babbage-002 fail since that day.
The error you get
What OpenAI answers a call to babbage-002 once the model is gone, as recorded from real responses:
{"error":{"message":"The model `babbage-002` 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 babbage-002
Move to the recommended replacement gpt-5.6-terra. Because gpt-5.6-terra is not served on /v1/completions, moving to it requires more than updating the model id: calls must shift to Chat Completions (/v1/chat/completions) or the Responses API (/v1/responses), adapting the prompt string into messages or input.
gpt-5.6-terra is not served on /v1/completions. Move the call to Chat Completions (/v1/chat/completions) or the Responses API (/v1/responses): the prompt string becomes messages or input.
In OpenAI's words
Shutdown date: 2026-09-28; Model / system: babbage-002; Recommended replacement: gpt-5.6-terra
Facts
- API
- OpenAI
api.openai.com - Model
babbage-002- Kind
- Model retirement
- Takes effect
- September 28, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
- Verified
- , against OpenAI's own pages
Questions
When does babbage-002 shut down?
Calls to the model babbage-002 on OpenAI stopped working on September 28, 2026.
What happens to calls after September 28, 2026?
They have failed since September 28, 2026.
What error does babbage-002 return once it is shut down?
OpenAI answers HTTP 404: "The model `babbage-002` 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.