xAI released Grok 4.6 on August 12, 2026. According to the official announcement on x.ai/news/grok-4-6, the model builds directly on Grok 4.5 with a particular focus on long-running agents and more ambitious interactive and visual work.

The company states that Grok 4.6 stays with complex tasks across many steps, whether researching a topic, analyzing information, working across a codebase, or turning an idea into a polished application or work artifact.

Key points from the official release

  • Grok 4.6 achieves frontier intelligence across several agentic coding and knowledge work benchmarks.
  • It matches GPT-5.6 Sol on the Artificial Analysis Intelligence Index (a composite of nine benchmarks).
  • Pricing remains the same as Grok 4.5: $2 per million input tokens and $6 per million output tokens. A faster variant is available at twice the price.
  • The model is available today in Cursor, Grok Build, the API, and through partners including OpenRouter, Vercel, and Cloudflare.
  • For the first week after launch, xAI is offering 2× included usage inside Grok Build and Cursor.

Training details provided by xAI

Grok 4.6 underwent a longer supplemental training run than Grok 4.5. The company describes the use of curated model-generated data for reasoning and advanced technical concepts, high-quality engineering data, and an improved optimizer and training recipe.

Elon Musk posted on X the same day: “Grok 4.6 is now out 🚀🚀🚀 Smart, fast & amazing bang for buck!” The official @SpaceXAI (xAI) account also published the launch announcement with supporting details.

Availability and attribution

This summary is based solely on the official xAI news post and related posts from verified accounts (@xai / @SpaceXAI and @elonmusk) on the day of release. No additional claims about performance beyond what xAI published are made here.

Grok 4.6 is positioned by xAI as a practical upgrade for users who need sustained agentic workflows rather than a pure benchmark-chasing model. Full technical details and benchmark tables are available on the official announcement page.

Source: Introducing Grok 4.6 | xAI, August 12, 2026.