Anthropic's AI infrastructure bill is nearly double what the public previously saw. According to Reuters reporting on September 29, Anthropic's confidential IPO prospectus filed with the U.S. Securities and Exchange Commission shows the company signed compute agreements with SpaceX worth up to $84.5 billion, all for Nvidia GPUs inside SpaceX data centers, running through 2029.
That figure is far larger than what SpaceX itself disclosed. In May, SpaceX said in its IPO filing that Anthropic was paying $1.25 billion a month for capacity at its Colossus 1 and Colossus 2 data centers, through May 2029 — about $45 billion in total. The Anthropic prospectus instead puts the ceiling at $84.5 billion, nearly $40 billion more, implying the two companies expanded the original deal significantly.
The contract structure is just as notable. Most of the SpaceX agreements can be terminated with just 90 days' written notice, an unusual degree of flexibility. By contrast, Anthropic's long-term contracts with cloud giants are mostly locked in: it must make up the shortfall on its $111.1 billion Google commitment if it underspends, the $31.4 billion Microsoft deal is non-cancelable except on Microsoft's default, and the $110 billion Amazon commitment is similarly rigid. Overall, Anthropic expects to spend at least $518 billion over the next decade across six infrastructure partners, roughly 80% of it in non-cancelable commitments or minimum payments due whether the capacity is used or not.
Why does this matter? First, it confirms that Elon Musk's SpaceX is becoming the AI industry's "compute landlord": after acquiring xAI in February, SpaceX has been building the Colossus 2 data center with more than a million GPUs while renting idle capacity to Google, Reflection AI, and Anthropic. Second, Anthropic states outright in its prospectus that future growth will be "limited principally by the availability of compute" — for a frontier AI lab, the ceiling is no longer algorithms, but who gets hold of enough GPUs first.
Reading the two numbers
The $84.5 billion agreement sends two signals. One is price: the ceiling AI companies are willing to pay for compute keeps rising, and SpaceX shares gained about 3% on September 29. The other is flexibility: while most of its spending is locked in, Anthropic deliberately kept a 90-day off-ramp — a sign it isn't sure whether compute will be in surplus or shortage, and it wants a brake. For readers, the takeaway is blunt: the race in frontier AI is shifting from "who has the better model" to "who has the cheaper compute," and newcomers like SpaceX that can both build rockets and run data centers are rewriting the supply map.
OpenAI is burning cash at a similar pace: earlier this month it disclosed it is negotiating a new funding round of about $30 billion at a $14 trillion pre-money valuation. (OpenAI nears $30 billion raise)
