xAI rents out its Colossus 1 data center capacity to Anthropic

In short: xAI and Anthropic announced a partnership where Anthropic will buy all computing capacity at xAI’s Colossus 1 data center.

What happened

xAI, Elon Musk’s AI company, and Anthropic, the company behind the Claude chatbot, said Anthropic is buying out “all of the compute capacity” at xAI’s Colossus 1 data center. “Compute capacity” is the raw computer power used to run and train AI, like renting an entire warehouse full of very fast computers.

TechCrunch reported the capacity involved is about 300 megawatts, and that the deal likely brings in billions of dollars for xAI. Anthropic said the purchase let it raise usage limits right away, meaning customers can do more with Claude without hitting as many caps.

Musk said on X that xAI had already moved its own AI training work to a newer site, Colossus 2. In other words, xAI claims it no longer needed both facilities for itself.

The article also notes that xAI’s best known product, Grok, has seen falling usage in 2026 after earlier problems tied to image generation. That context helps explain why selling spare computing power could be attractive, especially as xAI, now combined with SpaceX, moves toward a possible IPO.

Why it matters

This deal suggests xAI may be leaning toward a business model where it sells computing power to other AI companies, instead of using all of that power to build its own AI tools. That matters because computing power is one of the main bottlenecks in AI today, and it shapes which products get built and how quickly they improve.

Source: TechCrunch AI