# o4-mini

> It arrived beside o3 as half of the pair that could reach for every tool in ChatGPT on its own — search, Python, vision — and decide when to. Eighteen months is all it gets: of the four reasoning models going on 23 October, this is the youngest and the last to arrive.

2025-04-16 — still running · lived 1 year, 5 months · plot reserved

Also answers to: `o4-mini-2025-04-16`

## The record

- Provider: OpenAI
- Model id: `o4-mini`
- Cause of death: Superseded
- Funeral: 2026-10-23

## Sources

- https://developers.openai.com/api/docs/deprecations
- https://openai.com/index/introducing-o3-and-o4-mini/

## Elsewhere

- [Stand at this grave](https://models.rip/o4-mini)
- [The OpenAI plot](https://models.rip/openai)
- [The whole cemetery](https://models.rip/)