Grok 4.5

About Grok 4.5

Grok 4.5 is a frontier multimodal reasoning model from xAI offering strong performance across coding, STEM, and deep analytical tasks. It is equipped with a 500K context window and handles text, image, and file inputs.

Technical Specifications

Architecture specifications are undisclosed for proprietary models.

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 4.1
• Grok 4.3
• Grok 4.6