Anthropic reportedly leasing large GPU capacity from xAI's Colossus 1 cluster, social posts say

Anthropic said on May 6 that it had signed a deal with SpaceX to use all of the compute capacity at the Colossus 1 data center in Memphis, Tennessee, a site built around xAI infrastructure. CNBC reported that the arrangement gives Anthropic access to more than 300 megawatts of compute capacity and is intended to improve service for paid Claude users. TechCrunch reported on May 20 that the price is $1.25 billion per month, but that figure did not appear in Anthropic’s original public announcement. The social-media version of the story is therefore only partly unverified. The existence of a compute deal between Anthropic and SpaceX has been publicly reported by CNBC and other outlets, and the scale of the site has been described in trade coverage as more than 220,000 Nvidia GPUs and more than 300 megawatts. The monthly payment figure surfaced later in TechCrunch’s report and should be treated as a media report unless the companies publish the contract or confirm the number directly. (cnbc.com) ### So what is actually confirmed right now? Anthropic confirmed on May 6 that it would use all compute capacity at Colossus 1, and CNBC reported the site is in Memphis and tied to Elon Musk’s SpaceX after his merger of SpaceX and xAI earlier in 2026. CNBC also reported that Anthropic said the deal would directly improve capacity for Claude Pro and Claude Max subscribers. (cnbc.com) Data Center Dynamics reported that the agreement gives Anthropic access to more than 300 megawatts across more than 220,000 Nvidia GPUs within the month. That report also said the deal would hand over a little under half of the combined company’s total GPU fleet of around 500,000. (cnbc.com) ### Where did the $1.25 billion a month figure come from? TechCrunch reported on May 20 that Anthropic will pay xAI $1.25 billion per month for compute. Wired reported the same day that SpaceX IPO filing documents included details of a deal worth $15 billion a year for Anthropic to access the data centers. Those reports move the story beyond anonymous social posts, but they still depend on media accounts of filings rather than a public company statement laying out the full economics. (datacenterdynamics.com) The annualized math is straightforward. A payment of $1.25 billion per month equals about $15 billion per year, which is the figure repeated in later coverage. ### Why are people calling xAI an “AI landlord”? SpaceX and xAI built Colossus for their own frontier-model work, but the Anthropic arrangement turns that infrastructure into a revenue-generating compute lease. (techcrunch.com) Data Center Dynamics reported that Musk said SpaceXAI had already moved training to Colossus 2, making Colossus 1 available to lease to Anthropic. That framing matters because Anthropic is not a small customer. CNBC described Anthropic as a direct rival to xAI, and the deal shows a Musk-controlled infrastructure asset being rented to a competing model lab. The “AI landlord” label comes from that role: owning scarce large-scale compute and leasing it to others rather than using all of it internally. (datacenterdynamics.com) ### What does Anthropic say it gets from the deal? Anthropic said the Colossus capacity would improve service for paid Claude users, according to CNBC. Trade coverage also tied the added capacity to higher Claude Code limits and higher API rate limits for Claude models, though those product details were reported by outlets rather than fully reproduced in the CNBC excerpt. (cnbc.com) Tom Brown, Anthropic’s co-founder, was cited by TechWire Asia as saying Claude inference would begin moving onto Colossus in the days after the announcement. That suggests the deal is not only about future training runs but also about near-term inference capacity for commercial products. ### What should readers watch next? (cnbc.com) The next hard evidence is likely to come from primary documents or company disclosures. TechCrunch and Wired tied the payment figure to reporting on financing and filing materials, so the clearest next step is whether SpaceX, Anthropic or xAI publish contract terms, mention the deal in investor documents, or update product-capacity disclosures for Claude. (techcrunch.com) (techwireasia.com)