Grok 4.6 Is Here: xAI's Agent-Focused Frontier Model, Now on MuiRouter

On August 12, 2026, xAI released Grok 4.6 — a new frontier model built with a particular focus on long-running agents and more ambitious interactive and visual work.

grok-4.6 is now live on MuiRouter. With a single API key and a simple model name change, you can call it through the standard OpenAI-compatible endpoint (/v1/chat/completions).

Built for Long-Running Agents

Grok 4.6 builds on Grok 4.5 with a particular focus on sustained work: researching a topic, analyzing information, working across a codebase, or turning an idea into a polished application. Key points:

• Frontier agentic intelligence: matches GPT-5.6 Sol on the Artificial Analysis Intelligence Index (61 vs 61), well ahead of Grok 4.5 High (56).
• Stronger long-horizon behavior: on longer trajectories the model increasingly tests and verifies its own work before moving on.
• Better first passes on visual and interactive projects: it establishes structure and a visual language for an application in one pass, making it especially useful for iterating from a rough idea to a working first version.

Pricing

Grok 4.6 is priced identically to 4.5: $2 per 1M input tokens and $6 per 1M output tokens (a fast variant is available at 2x the price). It ships via the xAI API, Cursor, Grok Build, and partners including OpenRouter, Vercel, and Cloudflare.

On MuiRouter, grok-4.6 is billed at the official rate with a 1.05 markup: $2.10 / $6.30 per 1M tokens.

Conclusion

Grok 4.6 is the agentic workhorse of the Grok family: long-running multi-step tasks, codebase-scale work, and visual/interactive projects are where it shines. Try it today in the MuiRouter Playground, in your terminal AI agent, or through the OpenAI-compatible API — transparent pay-as-you-go billing, no monthly subscription.