Anthropic Signs $45 Billion Compute Deal With Nscale, a Two-Year-Old British Startup Prepping Its Own IPO

Anthropic has agreed to spend $45 billion over six years renting AI computing capacity from Nscale, a British infrastructure company that didn't exist until 2024, according to Bloomberg, which first reported the deal, and CNBC, which independently confirmed it Wednesday.

The arrangement covers about 460 megawatts of power at Nscale's flagship Monarch data center campus in West Virginia, enough electricity to run roughly 345,000 American homes, per Bloomberg's estimate cited by CNBC and The Next Web. The facility will run on Nvidia's next-generation Vera Rubin chips, expected online in late 2027, two people familiar with the matter told CNBC.

Nscale is two years old. It's never run a data center of this scale before. And it's reportedly preparing a US stock listing as early as next month, according to The Next Web and Stocktwits.

A Pattern, Not a One-Off

This isn't Anthropic's first massive compute bet, and it won't be the last. Stocktwits and Asianet News both note Anthropic has now signed $50 billion with Fluidstack, $10 billion with Volta Infra Holdings, and $45 billion with Elon Musk's SpaceX, on top of this Nscale deal. TechCrunch adds that Anthropic also expanded deals with Amazon Web Services (5 additional gigawatts), Google, Broadcom, and AMD ($5 billion) earlier this year, and signed a $10 billion deal with Volta for capacity from a data center in Norway.

Taken together, these agreements represent tens of billions of dollars in compute commitments signed over roughly the past year. Anthropic told the public earlier this year that surging demand for its Claude models was creating "inevitable strain" on infrastructure, hurting reliability during peak hours, according to CNBC. Whether the spending pace is sustainable remains unclear.

The Microsoft Detail Nobody's Highlighting Enough

Buried in multiple reports is a detail that deserves more attention: Microsoft signed a letter of intent for this exact West Virginia site back in March, then walked away sometime over the summer, according to Bloomberg's reporting as relayed by The Next Web, Stocktwits, and Asianet News. That's how Anthropic ended up as the tenant.

Microsoft didn't explain the decision. Representatives for both Microsoft and Anthropic declined to comment on the arrangement, per Asianet News. Nobody in these sources says why the world's second-largest cloud provider passed on a site Anthropic then bet $45 billion on. The coverage largely skips over this question.

Nscale's Numbers Deserve Scrutiny

The Next Web raises a fair and specific concern: Nscale is telling prospective IPO investors it has $51 billion in contracted revenue, but that figure reportedly represents future revenue booked in full the moment a contract is signed, against roughly $100 million in actual revenue in a recent quarter, according to The Next Web's own reporting.

That's a significant gap between signed commitments and cash collected. It matters enormously to anyone buying Nscale stock next month. A backlog is not revenue. If Vera Rubin chip delivery slips, if power buildout in West Virginia stalls, or if Anthropic's own IPO underwhelms and it has to rein in spending, that $51 billion backlog could look very different in two years.

None of the sources here present evidence that Nscale is misrepresenting anything to investors, and there's no indication regulators are looking at the company's disclosures. A company with two years of operating history and $100 million in quarterly revenue asking public markets to value it partly on a $51 billion backlog represents significant risk.

The Money and the Chips

Nscale's full Monarch campus, once built out to 1.35 gigawatts, is projected to cost $71 billion, with $47 billion of that going to chips alone, according to planning documents cited by Bloomberg and relayed by Stocktwits and Asianet News. Construction is expected to directly employ 4,375 workers, with full operations supporting 645 direct jobs and roughly 3,600 indirect positions in West Virginia, per those same planning documents.

Anthropic reached a $965 billion valuation in May and confidentially filed IPO paperwork with the SEC in June, according to CNBC, which also reports the company faces pressure to justify that valuation against rivals like OpenAI and Google as it courts Wall Street investors.

Nscale's board includes Sheryl Sandberg and former UK deputy prime minister Nick Clegg, according to The Next Web and Asianet News, giving the London startup a recognizable roster heading into its own listing.

What happens next is straightforward to track: Nscale's IPO, if it proceeds as early as next month, will force the company to disclose real financials to public investors for the first time. Anthropic's own IPO process, still in the confidential filing stage as of June per CNBC, will eventually require it to explain to Wall Street why its stacking series of multibillion-dollar compute commitments makes sense for a company whose infrastructure strategy is now central to its entire pitch.