Grok 4.3

About Grok 4.3

Released April 30, 2026 by xAI, Grok 4.3 is a powerful reasoning architecture featuring a 1M token context window and massive gains on instruction-following (81.3%) and scientific computing benchmarks. Optimized for complex multi-step programmatic investigations.

Technical Specifications

Detailed architecture specifications are limited for proprietary models.

Resources

About Grok 4

xAI's frontier intelligence models trained with reinforcement learning at unprecedented scale using the 200,000 GPU Colossus cluster. Grok 4 series demonstrates state-of-the-art performance in reasoning, coding, and multimodal understanding with native tool use capabilities. Features real-time search integration across X and the web, advanced reasoning through scaled RL training, and industry-leading performance on academic benchmarks. Designed for both immediate responses and extended thinking modes with vision capabilities.

Other Grok 4 Models

• Grok 4
• Grok 4.6
• Grok 4.1