Anthropic will pay xAI $1.25 billion every month through May 2029 to rent the entire output of the Colossus 1 data center near Memphis, according to TechCrunch AI. The deal, which surfaced in SpaceX’s S-1 filing with the SEC, could funnel xAI more than $40 billion in revenue over its lifetime. TechCrunch AI reports the contract covers 300 megawatts of compute, with a discounted rate during the first two months while xAI completes its ramp-up.
What stands out here is the role reversal. Anthropic and xAI are direct competitors in the frontier model race. Claude and Grok fight for the same paying users, the same enterprise contracts, the same talent. Now one is essentially landlord to the other.
The numbers in plain terms
- $1.25B/month: roughly $15 billion a year flowing from Anthropic to xAI
- 300 MW: the full output of Colossus 1, one of the largest single-site AI clusters in the US
- May 2029: contract end date, with a 90-day termination option for either side
- $40B+: total potential revenue to xAI across the deal’s life
SpaceX framed the arrangement as a smart play on idle capacity. “This allows us to monetize unused compute capacity in our infrastructure,” the filing said, adding that “we expect to enter into additional similar services contracts.”
Why xAI is suddenly a cloud provider
Most AI companies pick a lane. Either you build data centers for your own training and inference (OpenAI leaning on Microsoft, Anthropic on AWS and now Google), or you build them to sell to others (CoreWeave, Lambda, the hyperscalers). Doing both at once is rare.
The industry has a name for this hybrid posture: the “neocloud.” AI labs that overbuild capacity for their own roadmap turn around and rent the spillover to peers. It softens the brutal economics of infrastructure when your own product hasn’t grown into the racks you bought.
And that’s the part SpaceX’s filing tiptoes around. Grok usage has dropped sharply in recent months. Servers that xAI provisioned for its own assistant are sitting underused. Selling that capacity to Anthropic, a competitor whose Claude product is on a tear, is the cleanest way to turn dead silicon into pre-IPO revenue.
Why this matters for the industry
Compute is the gating constraint in modern AI. Every lab wants more of it, faster than the grid can deliver. The fact that Anthropic, which just signed massive commitments with Google and is reportedly approaching its first profitable quarter, is willing to lock in $40 billion of capacity from a rival tells you how desperate the supply situation is.
Three takeaways:
- Compute is now a tradable commodity between competitors. Brand rivalry no longer blocks the deal flow. Capacity is too scarce.
- xAI just bought itself an IPO narrative. A signed $40B contract reframes the company’s story from “Grok is losing users” to “we run one of the largest revenue-generating compute platforms in AI.”
- The 90-day exit clause is the real story. Either side can walk with three months’ notice. Anthropic isn’t locked in. xAI isn’t guaranteed the full $40B. The arrangement is more like a rolling lease than a multi-year commitment.
What to watch next
Expect more of these cross-rival compute deals to surface in coming filings. If xAI signs “additional similar services contracts,” as the S-1 hinted, the neocloud model becomes a category, not a one-off. Watch whether Meta, which also overbuilt, follows the same playbook. Watch whether Anthropic uses Colossus 1 for training, inference, or both, since that signals where Claude’s next bottleneck sits.
And watch Grok. If usage keeps sliding, the awkward truth gets harder to spin: xAI’s biggest customer for its own infrastructure is the team building Claude.
Full details are available at the original TechCrunch AI report.