Obituaries · OpenAI
o1-preview, 2024–2025
Retired by OpenAI
The first OpenAI model that made you wait while it thought, and billed you for the thinking.
o1-preview, an OpenAI model that answered questions, wrote emails and was blamed for both, was switched off on July 28, 2025, aged 10 months. Code that still calls it will find out the hard way.
It is survived by o3, who is already doing the job.
| Model ID | o1-preview |
|---|---|
| Provider | OpenAI deprecations page |
| Born | September 12, 2024 |
| Shut down | July 28, 2025 |
| Successor | o3 |
In lieu of flowers
Replace the string. Search your code for o1-preview and swap it for o3, 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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[](https://lira-ia.github.io/obituaries/o1-preview/)
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Technical notice, with a code scanner: o1-preview on Model Graveyard Check