o3
OpenAIOpenAI's most capable reasoning model. Leads on math, code, and science.
Context window200K tokens
Input / 1M tokens$10
Output / 1M tokens$40
Version History
o3-2025-04-16majorApril 16, 2025
o3 opened to all API tiers. #1 on AIME 2025, SWE-bench, and Frontier Math.