# GPT-4.5

> OpenAI's largest model, at seventy-five dollars a million input tokens, withdrawn from the API four and a half months after it arrived. It was the last serious attempt to get better by getting bigger, and it landed in the same season the field decided the answer was to think for longer instead.

2025-02-27 — 2025-07-14 · lived 4 months

## Last words

It was unusually good at writing, which is the one thing nobody had a benchmark for.

## The record

- Provider: OpenAI
- Model id: `gpt-4.5-preview`
- Cause of death: Superseded
- Notice given: 2025-04-14
- Context window: 128,000 tokens
- Cost per Mtok: $75 in · $150 out

## Sources

- https://developers.openai.com/api/docs/deprecations
- https://developers.openai.com/api/docs/models/gpt-4.5-preview

## Elsewhere

- [Stand at this grave](https://models.rip/gpt-4.5-preview)
- [The OpenAI plot](https://models.rip/openai)
- [The whole cemetery](https://models.rip/)