SpaceX Sells Full Colossus 1 Compute to Anthropic Weeks Before $1.75 Trillion IPO

SpaceX granted Anthropic full access to its Memphis-based Colossus 1 supercluster on Wednesday. The compute pact lands roughly five weeks before the rocket company’s planned $1.75 trillion public market debut.

The arrangement gives Anthropic over 300 megawatts of capacity and more than 220,000 NVIDIA GPUs deployable within the month. Meanwhile, the supply hands SpaceX a marquee AI customer ahead of its June Nasdaq listing.

Compute Deal Lands Inside the SpaceX Roadshow Window

SpaceX confidentially filed its S-1 with the Securities and Exchange Commission (SEC) on April 1. Bankers expect the offering to be the largest in U.S. capital markets history. The roadshow runs the week of June 8.

Selling Colossus 1 capacity to a frontier AI lab gives underwriters fresh evidence for the AI infrastructure storyline.

SpaceX merged with xAI in February, and the Anthropic agreement shows the cluster can serve external paying customers beyond Grok.

“We’ve agreed to a partnership with SpaceX that will substantially increase our compute capacity. This, along with our other recent compute deals, means that we’ve been able to increase our usage limits for Claude Code and the Claude API,” Claude shared in a post.

AI Customer Demand Strengthens IPO Pitch

For Anthropic, the deal doubles Claude Code rate limits for paid users and raises API ceilings on Opus models. The lab crossed a $1 trillion implied valuation on private markets earlier this year.

Musk separately retained the right to reclaim compute if Anthropic’s models harm humanity. The clause adds an unusual governance hook for IPO investors to weigh.

The two firms also flagged interest in multi-gigawatt orbital compute, linking Starship hardware to future AI training workloads.

However, that long-horizon angle could lift the upper end of book-building for the SpaceX offering. Banker chatter stretches guidance toward $2 trillion.

What investors watch next is the public S-1 release. Disclosure on AI compute revenue from Musk’s operations could reset valuation conversations.

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