Models
Grok 4.6
SpaceXAI's frontier model for coding, agentic tasks, and knowledge work, released August 12, 2026. A post-training upgrade over Grok 4.5 tuned for agents that stay on a task across many steps, with a 500K-token context window.
Highlights
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500K context
Text and image input, text output, and no stated output limit. Knowledge cutoff February 1, 2026.
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Reasoning effort up to xhigh
Low, medium, high (default), and a new xhigh level for the hardest multi-step work.
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Tools built in
Function calling, structured outputs, web search, X search, and code execution on the Responses and Chat Completions APIs.
Availability
Model name grok-4.6 on the xAI API. Default model in Grok Build, available in Cursor on all plans, and through OpenRouter, Vercel, and Cloudflare.
Pricing
Paid Input $2 / MTok
Output $6 / MTok
Cached input $0.50 / MTok
Prompts of 200K tokens or more bill at $4 input and $12 output for the whole request. A fast variant costs twice the price. No open weights.