o3
OpenAI
Key facts · verified Oct 29, 2026
o3 is an OpenAI model. Status: Deprecated - shutting down 11 December 2026; replacement: gpt-5.6-sol. Its API price is $2 per million input tokens and $8 per million output tokens. Its context window is 200K tokens. It ranks #114 on LMArena's text leaderboard (Elo 1432, read 1 Nov 2026). Source: developers.openai.com.
o3 is an OpenAI reasoning model listed at $2 per million input tokens and $8 per million output tokens, with a 200K-token context window. OpenAI's deprecations page lists the o3-2025-04-16 snapshot for shutdown on 11 December 2026, with gpt-5.6-sol as the replacement. On LMArena's text leaderboard it has 1432 Elo (rank 114).
Pricing & specs checkedSource: vendor documentation · checked Oct 29, 2026LMArena: 1432 Elo (rank 114) · source · retrieved Nov 1, 2026
Full Specifications
$2 / $8 per million tokens | |
|---|---|
| Identity | |
| Developer | OpenAI |
| Status | Deprecated - shutting down 11 December 2026; replacement: gpt-5.6-sol |
| Licence | Proprietary |
| Self-hostable | No |
| Cost | |
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $3.500 / 1M tokens |
| Input price | $2.000 / 1M tokens |
| Output price | $8.000 / 1M tokens |
| Capacity | |
| Context window | 200K tokens |
| Measured quality | |
| LMArena Elo | 1432 (checked Nov 2026) |
| LMArena rank | Rank 114 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 409 |