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OpenAI
O Series
Closed source3 variants
o3
reasoningOpenAI's o3 reasoning model — extended chain-of-thought for the hardest math, science, and coding problems.
200K tokens$10 in · $40 out / 1MTransformerProprietary
o3
79.4%o4-mini
76.1%o3-mini
62.1%Agent2030-v2.3 (o3 + GPT-4.1 + Gemini 2.5 Pro)
reasoning
OpenAI's o3-mini — efficient reasoning model with strong STEM performance at significantly lower cost than o3.
200K tokens$1 in · $4 out / 1MTransformer
reasoning
OpenAI's o4-mini — next-generation compact reasoning model with improved tool use and agentic capabilities.
200K tokens$1 in · $4 out / 1MTransformer
