OpenAI · Model retirement
o4-mini-deep-research
Stopped working
Calls to the model o4-mini-deep-research on OpenAI stopped working on July 23, 2026.
What to use instead of o4-mini-deep-research
Move to gpt-5.6-sol, recommended by OpenAI.
Facts
- API
- OpenAI
api.openai.com - Model
o4-mini-deep-research- Kind
- Model retirement
- Takes effect
- July 23, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
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