o1
OpenAI
Key facts · verified Oct 29, 2026
o1 is an OpenAI model. Status: Deprecated - shutting down 23 October 2026; replacement: gpt-5.6-sol. Its API price is $15 per million input tokens and $60 per million output tokens. Its context window is 200K tokens. It ranks #161 on LMArena's text leaderboard (Elo 1402, read 1 Nov 2026). Source: developers.openai.com.
o1 is an OpenAI reasoning model listed at $15 per million input tokens and $60 per million output tokens, with a 200K-token context window. OpenAI's deprecations page lists o1 (o1-2024-12-17) for shutdown on 23 October 2026, with gpt-5.6-sol as the replacement. On LMArena's text leaderboard it has 1402 Elo (rank 161).
Pricing & specs checkedSource: vendor documentation · checked Oct 29, 2026LMArena: 1402 Elo (rank 161) · source · retrieved Nov 1, 2026
Full Specifications
$15 / $60 per million tokens | |
|---|---|
| Identity | |
| Developer | OpenAI |
| Status | Deprecated - shutting down 23 October 2026; replacement: gpt-5.6-sol |
| Licence | Proprietary |
| Self-hostable | No |
| Cost | |
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $26.250 / 1M tokens |
| Input price | $15.000 / 1M tokens |
| Output price | $60.000 / 1M tokens |
| Capacity | |
| Context window | 200K tokens |
| Measured quality | |
| LMArena Elo | 1402 (checked Nov 2026) |
| LMArena rank | Rank 161 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 53 |