ChatGPT 4o Latest
OpenAI
Key facts · verified Oct 29, 2026
ChatGPT 4o Latest is an OpenAI model. It was retired on 17 February 2026. Its last listed API price was $5 per million input tokens and $15 per million output tokens. Its context window is 128K tokens. It ranks #91 on LMArena's text leaderboard (Elo 1443, read 1 Nov 2026). Source: developers.openai.com.
ChatGPT 4o Latest (chatgpt-4o-latest) is a model from OpenAI with a 128K-token context window. OpenAI deprecated it and removed it from the API on 17 February 2026, naming gpt-5.1-chat-latest as the replacement. It was priced at $5 per million input tokens and $15 per million output tokens. 1443 Elo (rank 91)
Pricing & specs checkedSource: vendor documentation · checked Oct 29, 2026LMArena: 1443 Elo (rank 91) · source · retrieved Nov 1, 2026
Full Specifications
$5 / $15 per million tokens | |
|---|---|
| Identity | |
| Developer | OpenAI |
| Retired | 17 February 2026 |
| Status | Retired. OpenAI removed chatgpt-4o-latest from the API on 17 February 2026; replacement: gpt-5.1-chat-latest. |
| Licence | Proprietary |
| Self-hostable | No |
| Cost | |
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $7.500 / 1M tokens |
| Input price | $5.000 / 1M tokens |
| Output price | $15.000 / 1M tokens |
| Capacity | |
| Context window | 128K tokens |
| Measured quality | |
| LMArena Elo | 1443 (checked Nov 2026) |
| LMArena rank | Rank 91 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 192 |