SpaceX’s Biggest Customer Is Also Its Biggest IPO Rival Paying $15 Billion a Year

The same week SpaceX took its IPO to Wall Street, its biggest AI client showed up at the same door.

SpaceX launched its IPO roadshow this week, targeting $75 billion, the largest public offering in history, with a June 12 Nasdaq debut under ticker SPCX. On the same day, Anthropic, which pays SpaceX $1.25 billion a month for AI compute, filed its own confidential IPO prospectus with the SEC.

The two companies, which compete directly in AI through xAI’s Grok and Anthropic’s Claude, are now officially racing each other for the same institutional capital.

The $15 Billion Contract With a Six-Month Exit

SpaceX’s amended IPO filing discloses the full Anthropic deal: 325,000 Nvidia GPUs across its Colossus and Colossus II facilities in Memphis, $1.25 billion a month through May 2029. But the filing contains a clause that changes how investors should read that revenue.

After an initial three-month period, either party can terminate the agreements with 90 days’ notice. What reads as up to $45 billion in contracted future revenue is actually an arrangement either side can exit within roughly three months.

For a company where Anthropic’s payments approach its entire annual revenue, that termination clause is the most important sentence in the filing. As BeInCrypto’s earlier analysis of the SpaceX-Anthropic relationship noted, the financial entanglement between the two was always the central risk in SpaceX’s IPO narrative.

Two IPOs, One Capital Pool

Both companies now compete for institutional allocations in the same window. Goldman Sachs holds the lead position on SpaceX’s offering. Morgan Stanley manages a direct share program that reserves 5% of IPO stock for insiders selected “based on the discretion of our executive officers,” with no lockup restriction, meaning those participants can sell from day one.

Anthropic’s IPO, targeting a $965 billion valuation, will follow SpaceX and OpenAI into a market already absorbing more capital than any IPO cycle in recent history.

Institutions choosing between the two face a direct tradeoff: SpaceX’s valuation depends partly on Anthropic’s compute payments, and Anthropic is building its own infrastructure that could make those payments unnecessary.

The same IPO that lists Musk’s aerospace company on June 12 carries a clause that lets its most important client walk away in 90 days. Whether investors read that as flexibility or fragility will set the price.

Elon Musk’s ‘Evil Detector’

Three months before signing Anthropic to a $15 billion annual compute deal, Musk was doing the opposite. In March, he called Anthropic “evil” and “misanthropic” on X, retweeted a post urging Anthropic employees to quit, and asked: “Is there a more hypocritical company than Anthropic?”

Your AI hates Whites & Asians, especially Chinese, heterosexuals and men. This is misanthropic and evil. Fix it. Frankly, I don’t think there is anything you can do to escape the inevitable irony of Anthropic ending up being Misanthropic. You were doomed to this fate when you…

— Elon Musk (@elonmusk) February 12, 2026

By May, he had leased them the world’s largest AI supercomputer and posted a full reversal on the same platform: “Everyone I met was highly competent and cared a great deal about doing the right thing. No one set off my evil detector.”

Same here. By way of background for those who care, I spent a lot of time last week with senior members of the Anthropic team to understand what they do to ensure Claude is good for humanity and was impressed. Everyone I met was highly competent and cared a great deal about…

— Elon Musk (@elonmusk) May 6, 2026

The shift from rival to landlord took roughly 90 days, which happens to be the same notice period that lets either side walk away from the deal.