# 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

This URL is the guided walk — the 3D cemetery, standing at this grave. The written record is at [o4-mini's epitaph](https://models.rip/o4-mini/epitaph).

## Elsewhere

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