# 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

Also answers to: `o1-2024-12-17`

## The record

- Provider: OpenAI
- Model id: `o1`
- Cause of death: Superseded
- Funeral: 2026-10-23

## Sources

- https://developers.openai.com/api/docs/deprecations
- https://developers.openai.com/api/docs/changelog
- https://en.wikipedia.org/wiki/OpenAI_o1

## Elsewhere

- [Stand at this grave](https://models.rip/o1)
- [The OpenAI plot](https://models.rip/openai)
- [The whole cemetery](https://models.rip/)