Grok 4.1 Fast

About Grok 4.1 Fast

Grok 4.1 Fast is a high-throughput reasoning model from xAI engineered for low-latency agentic workflows and real-time data grounding. It supports multihop web search, tool execution, and dual thinking modes across a 2M token context window.

Technical Specifications

Architecture specifications are undisclosed 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 4.7
• Grok 4.6
• Grok 4.3
• Grok 4.5
• Grok 4.6
• Grok 4.1