# o1

> The preview had already made the case; this was the model that closed it, reaching the API in December 2024 and turning reasoning from a demonstration into something you could put in production. Every model that thinks before it answers is downstream of it. It stops taking requests on 23 October.

2024-12-17 — still running · lived 1 year, 9 months · plot reserved

This URL is the guided walk — the 3D cemetery, standing at this grave. The written record is at [o1's epitaph](https://models.rip/o1/epitaph).

## Elsewhere

- [The whole cemetery](https://models.rip/)
- [The dataset](https://models.rip/graveyard.json)