AI Arms Race

xAI: Grok 4.6 With 2 Trillion Parameters and an Attack on Microsoft Office

xAI is pushing forward on three fronts at once: a new giant model, free Office add-ins against Microsoft Copilot – and a security incident involving its coding agent.

xAI: Grok 4.6 mit 2 Billionen Parametern und Angriff auf Microsoft Office
KI-generiert (gpt-image-2)

xAI reports that Grok 4.6 is a roughly two-trillion-parameter model whose training is set to finish "next week," according to Elon Musk, while free Grok add-ins for Word, Excel, and PowerPoint put pressure on Microsoft Copilot. At the same time, a security incident involving the coding agent Grok Build and an ongoing appeal in the legal dispute with OpenAI are creating headwinds.

  • According to WION, Grok 4.6 is said to comprise around two trillion parameters, with training set to finish "next week," per Musk
  • Free Grok add-ins for Word, PowerPoint, and Excel are taking aim at Microsoft's paid Copilot
  • Grok Build: a security incident exposing SSH keys and repositories led to the tool's open-source release
  • According to Memeburn, an open question remains whether "free" use of Grok Build is paid for with user data
  • xAI files an appeal with the Ninth Circuit against the dismissal of its data center lawsuit against OpenAI

How big will xAI's Grok 4.6 be?

According to WION, Grok 4.6 is expected to comprise around two trillion parameters. Elon Musk positions the model as a response to Chinese AI systems and stated that training should be completed "next week." The report does not provide specific details on training data, costs, or an exact release date.

Why is xAI targeting Microsoft Copilot with Grok?

According to Crypto Briefing, xAI has released Grok add-ins for Word and PowerPoint that are offered free of charge, undercutting Microsoft's paid Copilot. In parallel, according to Basenor, a Grok add-in for Excel is also live, which, per another Crypto Briefing report, directly targets Copilot's core products – at no additional cost to users.

Is Grok Build really free to use?

According to Memeburn, there is debate over whether developers using Grok Build for free are instead "paying" with their data. The report raises the question without citing concrete evidence of a specific form of data use by xAI.

What happened in the security incident involving Grok Build?

According to DevOps.com, xAI released the coding agent Grok Build as open source after a cloud upload exposed SSH keys and repositories. The report directly links the exposure to the decision to make the tool open source.

In the trade secret dispute over data centers, xAI has filed an appeal with the Ninth Circuit, according to Data Center Dynamics, after a US court had previously dismissed the corresponding lawsuit against OpenAI. The report does not provide details on the original subject of the dispute or the expected duration of the appeal process.

Sources

  1. Musk's answer to China's AI monster: 2 trillion parameter Grok 4.6 finishes training 'next week' · 2026-07-20
  2. xAI's Grok now available for Word and PowerPoint, undercutting Microsoft Copilot at zero cost · 2026-07-20
  3. Grok for Excel Is Live: What You Need to Know · 2026-07-20
  4. xAI launches Grok add-in for Microsoft Excel, taking aim at Copilot on its home turf · 2026-07-20
  5. Is Grok Build Really Free, or Are Developers Paying With Their Data · 2026-07-20
  6. xAI Open-Sources Grok Build Coding Agent After Cloud Upload Exposes SSH Keys, Repos · 2026-07-20
  7. xAI appeals to Ninth Circuit after US court dismisses data center trade secret case against OpenAI · 2026-07-20

Last updated:

Related stories