# o3-mini

> The first reasoning model OpenAI gave away: free ChatGPT users got it on the day it launched, which meant a great many people used a model that thinks before it answers without ever choosing one. Reasoning stopped being a paid tier that January. Its shutdown is 23 October.

2025-01-31 — still running · lived 1 year, 7 months · plot reserved

Also answers to: `o3-mini-2025-01-31`

## The record

- Provider: OpenAI
- Model id: `o3-mini`
- Cause of death: Superseded
- Funeral: 2026-10-23
- Succeeded by: [o4-mini](https://models.rip/o4-mini/epitaph) (this archive's reading of lineage, not the provider's migration guidance)

## Sources

- https://developers.openai.com/api/docs/deprecations
- https://openai.com/index/openai-o3-mini/

## Elsewhere

- [Stand at this grave](https://models.rip/o3-mini)
- [The OpenAI plot](https://models.rip/openai)
- [The whole cemetery](https://models.rip/)