Grok 4
xAI · 2025-07-09
Grok 4 is xAI's flagship model released in July 2025, trained on xAI's 200,000-GPU Colossus cluster with reasoning reinforcement learning run at pretraining scale. It features native tool use, real-time web search integration, and a 256,000-token context window, and was released alongside Grok 4 Heavy, a multi-agent configuration that coordinates multiple Grok 4 instances for deeper analysis. The model is available via the xAI API and SuperGrok subscriptions.