Model

Grok 4

by xAI (Grok)
Family
Grok
Context window
256,000 tokens
Open weights
No
Release date
2025-07-09

Benchmark notes

xAI claimed top results on ARC-AGI (15.9%), GPQA, AIME 2025, USAMO 2025 (Grok 4 Heavy 61.9%), and LiveCodeBench at release; positioned by xAI as 'most intelligent model in the world.'