Comprehensive side-by-side LLM comparison
o3 is $50.00 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
OpenAI
OpenAI o3, released by OpenAI in April 2025, is a large reasoning model that applies extended chain-of-thought processing to deliver improved performance on complex math, science, and coding tasks. It features a 200K token context window and native image understanding, with demonstrated strong results on mathematics and software engineering benchmarks. o3 targets demanding analytical and engineering tasks where deliberate, multi-step reasoning produces significantly better outcomes than direct generation.
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.
1 month newer

o3
OpenAI
2025-04-16

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