SpaceX's IPO Cracked Open xAI's Books, and They Look Brutal

SpaceX's IPO Cracked Open xAI's Books, and They Look Brutal

SpaceX's blockbuster IPO came with a side effect Elon Musk may not have wanted: it forced xAI's finances into the open. The filing shows Musk's AI startup lost about 2.47 billion dollars in the first quarter alone, on just 818 million in revenue, while spending 7.7 billion on infrastructure in the same three months. The numbers are staggering.

This is one of the first real looks inside a frontier AI lab's books, and it is not pretty. Because SpaceX is tied to xAI, the IPO disclosures pulled back the curtain. xAI lost 1.56 billion in 2024 and 6.4 billion in 2025, and 2026 is on pace to dwarf both. Capex alone is running at roughly 30 billion dollars a year, more than double last year. One analyst called the financials reckless.

The gap between earning and spending is the whole story. xAI brought in 818 million dollars of revenue in the first quarter and lost three times that. Its 7.7 billion in quarterly capex is mostly Nvidia GPUs and data centers, the cost of trying to keep Grok competitive with OpenAI and Google. And here is the twist. xAI's single biggest revenue line is not its own users. It is renting compute to a rival, Anthropic, which pays 1.25 billion dollars a month for capacity, on a deal Anthropic can cancel in 90 days.

The timing is awkward. SpaceX just completed the largest IPO in history, and these disclosures rode along with it, giving public investors their first hard numbers on the AI burn rate behind the hype. It does not change SpaceX's own strong business, but it puts a real figure on what the AI arms race costs, and the figure is enormous. For the broader AI trade, it is a reminder that frontier models are a cash furnace.

The question is how long this is sustainable. xAI can keep spending as long as Musk can keep raising, and his ability to raise has never really been in doubt. But a lab that loses three dollars for every one it earns, and whose biggest customer is a competitor that can walk in 90 days, is a fragile setup if funding tightens. With the Fed turning hawkish and money getting more expensive, the cost of the AI race just got more visible at an awkward time.

So the most interesting thing in the biggest IPO ever was not the rockets. It was the AI company next door, burning billions a quarter with revenue a fraction of its spend. The hype around frontier AI is loud. The economics underneath, now partly in public, are sobering. Worth remembering when the next valuation headline lands.