SpaceX Rents Colossus-1 Compute to Anthropic — Musk Is Now Bankrolling His Biggest Rival
SpaceX is leasing capacity from xAI's Colossus-1 supercomputer to Anthropic, turning Elon Musk into an infrastructure provider for one of OpenAI's fiercest competitors — and his own.
SpaceX has begun renting compute capacity from xAI's Colossus-1 supercomputer to Anthropic, as first reported by @herbertong. The arrangement means Elon Musk — who controls both SpaceX and xAI — is now directly enabling one of the most well-funded competitors to OpenAI, the company he co-founded and then sued. The deal underscores a fundamental shift in how AI compute is being commoditized and traded between nominally rival organizations.
The strategic logic, at least from SpaceX's side, is straightforward. Colossus-1 was built to train xAI's Grok models, but large-scale training runs are bursty by nature — clusters sit idle between major runs. Renting spare capacity to Anthropic generates revenue from otherwise dormant infrastructure. For Anthropic, access to Colossus-1 addresses one of its most persistent bottlenecks: securing enough high-end compute to train frontier models without being entirely dependent on Amazon Web Services, its primary cloud partner.
Get our free daily newsletter
Get this article free — plus the lead story every day — delivered to your inbox.
Want every article and the full archive? Upgrade anytime.
No spam. Unsubscribe anytime.