Comprehensive side-by-side LLM comparison
o3 leads with 8.5% higher average benchmark score. o3-mini is $4.50 cheaper per million tokens. o3 supports multimodal inputs. Overall, o3 is the stronger choice for coding tasks.
OpenAI
o3 represents the next generation in OpenAI's reasoning model series, developed to advance the capabilities of deliberate, step-by-step problem solving. Built to handle increasingly complex challenges across mathematics, science, and coding, it continues the evolution of reasoning-focused AI with improved analytical depth and accuracy.
OpenAI
o3-mini was created as an efficient variant of the o3 reasoning model, designed to provide advanced thinking capabilities with reduced computational requirements. Built to make next-generation reasoning accessible to a broader range of applications, it balances analytical depth with practical speed and cost considerations.
2 months newer

o3-mini
OpenAI
2025-01-30

o3
OpenAI
2025-04-16
Cost per million tokens (USD)

o3

o3-mini
Context window and performance specifications
Average performance across 6 common benchmarks

o3

o3-mini
Performance comparison across key benchmark categories

o3

o3-mini
o3-mini
2023-09-30
o3
2024-05-31
Available providers and their performance metrics

o3
OpenAI

o3-mini

o3

o3-mini

o3

o3-mini
Azure
OpenAI