# o1 pro

> A hundred and fifty dollars a million tokens in, six hundred out: the most expensive thing OpenAI has ever put behind an API, sold on the premise that some questions are worth more compute than others. It was o1 given longer to think. Nineteen months later it is switched off alongside the tier it defined.

2025-03-19 — still running · lived 1 year, 6 months · plot reserved

Also answers to: `o1-pro-2025-03-19`

## The record

- Provider: OpenAI
- Model id: `o1-pro`
- Cause of death: Superseded
- Funeral: 2026-10-23
- Context window: 200,000 tokens
- Cost per Mtok: $150 in · $600 out

## Sources

- https://developers.openai.com/api/docs/deprecations
- https://techcrunch.com/2025/03/19/openais-o1-pro-is-its-most-expensive-model-yet/

## Elsewhere

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