Comprehensive side-by-side LLM comparison
o3 Pro offers 106.5K more tokens in context window than o1 mini. o1 mini is $94.50 cheaper per million tokens. o3 Pro supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
OpenAI
OpenAI o1 mini, released by OpenAI in September 2024, is a lightweight reasoning model from the o1 family optimized for efficient STEM problem-solving at lower cost and latency. It features a 128K token context window and applies chain-of-thought reasoning specifically tuned for mathematics, science, and coding tasks. o1 mini targets use cases where rapid, cost-efficient reasoning is preferred over the broader capabilities of the full o1 model.
OpenAI
OpenAI o3-pro, released by OpenAI in June 2025, is an extended reasoning model from the o3 family that applies more compute per response to deliver deeper, more thorough answers on complex problems. It features a 200K token context window, 100K maximum output tokens, and vision capabilities. o3-pro targets research-grade reasoning tasks, extended coding sessions, and applications where accuracy on difficult problems justifies higher inference cost and latency.
9 months newer

o1 mini
OpenAI
2024-09-12

o3 Pro
OpenAI
2025-06-10
Cost per million tokens (USD)
o1 mini
o3 Pro
Context window and performance specifications
Available providers and their performance metrics
o1 mini
OpenAI
o3 Pro
o1 mini
o3 Pro
o1 mini
o3 Pro
OpenAI