Obituaries · OpenAI
o3-deep-research, ?–2026
OpenAI model switched off
o3-deep-research, an OpenAI model that answered questions, wrote emails and was blamed for both, was switched off on July 23, 2026. Code that still calls it will find out the hard way.
Its work passes to gpt-5.6-sol, which the family describes as 'recommended'.
| Model ID | o3-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 o3-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: o3-deep-research on Model Graveyard Check