Grok 4

xAI's Grok 4 flagship — frontier reasoning and multimodal model with a 256K context window and tool-use capabilities.

xAI's ultra-fast Grok 4.1 Fast — 2M context at a fraction of the cost, optimised for high-throughput production.

xAI's Grok 4.20 with 2M token context — advanced reasoning and multi-agent capabilities for complex agentic workflows.

xAI's Grok 4.20 Multi-Agent — specialised for orchestrating complex multi-agent workflows with 2M token context.