Obituaries · OpenAI
o4-mini-deep-research, ?–2026
Retired by OpenAI
OpenAI has confirmed the retirement of o4-mini-deep-research, effective July 23, 2026. It answered questions, wrote emails and was blamed for both. Calls to its ID are now expected to fail.
It is survived by gpt-5.6-sol, who is already doing the job.
| Model ID | o4-mini-deep-research |
|---|---|
| Provider | OpenAI deprecations page |
| Shut down | July 23, 2026 |
| Successor | gpt-5.6-sol |
In lieu of flowers
Replace the string. Search your code for o4-mini-deep-research and swap it for gpt-5.6-sol, or paste a repo into Model Graveyard Check to find every dead model at once.
Want to say something to it? Leave a letter on the farewell wall.
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Technical notice, with a code scanner: o4-mini-deep-research on Model Graveyard Check