Comprehensive side-by-side LLM comparison
Grok 4 Fast leads with 6.7% higher average benchmark score. Overall, Grok 4 Fast is the stronger choice for coding tasks.
xAI
Grok 4 Fast is a multimodal language model developed by xAI. It achieves strong performance with an average score of 73.0% across 7 benchmarks. It excels particularly in SimpleQA (95.0%), HMMT 2025 (93.3%), AIME 2025 (92.0%). With a 2.0M token context window, it can handle extensive documents and complex multi-turn conversations. The model is available through 1 API provider. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents xAI's latest advancement in AI technology.
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 4 Fast
xAI
2025-08-28
Context window and performance specifications
Average performance across 1 common benchmarks

Grok 4 Fast

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

Grok 4 Fast
xAI

o1-pro

Grok 4 Fast

o1-pro

Grok 4 Fast

o1-pro