Comprehensive side-by-side LLM comparison
o1-pro leads with 6.3% higher average benchmark score. o1-pro supports multimodal inputs. o1 is available on 2 providers. Overall, o1-pro is the stronger choice for coding tasks.
OpenAI
o1 was developed as part of OpenAI's reasoning-focused model series, designed to spend more time thinking before responding. Built to excel at complex reasoning tasks in science, coding, and mathematics, it employs extended internal reasoning processes to solve harder problems than traditional language models through careful step-by-step analysis.
OpenAI
o1-pro was developed as an enhanced version of the o1 reasoning model, designed to provide extended reasoning capabilities with greater depth and reliability. Built for professionals and advanced users tackling complex analytical tasks, it offers enhanced thinking time and reasoning quality for the most demanding applications.
Launched on the same date

o1
OpenAI
2024-12-17

o1-pro
OpenAI
2024-12-17
Context window and performance specifications
Average performance across 2 common benchmarks

o1

o1-pro
o1-pro
2023-09-30
Available providers and their performance metrics

o1
Azure
OpenAI


o1

o1-pro

o1

o1-pro
o1-pro