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SpaceXAI

Grok 4.6

Grok 4.6 is SpaceXAI's frontier reasoning model for long-running agents, coding, and knowledge work, with a 500K tokens context window and four reasoning levels including a new xhigh setting. Your use is subject to SpaceXAI's Terms & Privacy Policies.

ReasoningTool UseImplicit CachingVision (Image)
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import { streamText } from 'ai'


const result = streamText({
  model: 'spacexai/grok-4.6',
  prompt: 'Why is the sky blue?'
})
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Copy link to headingAbout Grok 4.6

Grok 4.6 was released August 12, 2026 as SpaceXAI's frontier reasoning model for long-running agents, coding, and knowledge work. It refines Grok 4.5 rather than replacing the foundation underneath it, so the shape of the model is familiar and the gains show up in sustained agentic work. Grok 4.6 accepts text and image input, returns text, and works within a context window of 500K tokens. SpaceXAI lists a knowledge cutoff of February 1, 2026.

Reasoning depth is a per-request setting, and Grok 4.6 adds a fourth level. Alongside low, medium, and high, an xhigh setting pushes the model further on problems that reward more deliberation. High remains the default. On longer trajectories Grok 4.6 checks its own work before moving on, which is the behaviour that matters most when an agent chains dozens of steps without a human in the loop.

Grok 4.6 leads on GDPval-AA v2 and AA-Briefcase, and scores 61 on the Artificial Analysis Intelligence Index. Coding results are more mixed: it trails the strongest models on DeepSWE v1.1 and Terminal-Bench v3.0, so benchmark it against your own repository before switching a coding agent over.

Pricing is tiered by prompt length, with a higher rate once a request crosses 200K tokens. See the pricing panel on this page for current rates before you send very long prompts.

You can integrate Grok 4.6 through AI SDK, Chat Completions API, Responses API, Messages API, or other API formats, from TypeScript or Python. Routing rules move traffic from another Grok model to Grok 4.6 without changing application code.