OpenAI · Model retirement
gpt-3.5-turbo-instruct
Stopped working
Calls to the model gpt-3.5-turbo-instruct on OpenAI stopped working on September 28, 2026.
What to use instead of gpt-3.5-turbo-instruct
Move to gpt-5.6-terra, recommended by OpenAI.
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, and the text comes back in a message rather than choices[].text.
Facts
- API
- OpenAI
api.openai.com - Model
gpt-3.5-turbo-instruct- Kind
- Model retirement
- Takes effect
- September 28, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
gpt-3.5-turbo-instruct on other APIs
- Azure OpenAI Deprecated, no date
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