Comprehensive side-by-side LLM comparison
o1-pro supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
xAI
Grok Code Fast was developed as a specialized coding model optimized for speed, designed to provide rapid code completion, generation, and assistance. Built to serve developers requiring quick feedback and iterative coding support, it combines programming expertise with low-latency responses.
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.
8 months newer

o1-pro
OpenAI
2024-12-17

Grok Code Fast 1
xAI
2025-08-28
Context window and performance specifications
o1-pro
2023-09-30
Available providers and their performance metrics

Grok Code Fast 1
xAI

o1-pro

Grok Code Fast 1

o1-pro

Grok Code Fast 1

o1-pro