Anthropic Buys $3.4 Billion in Natural Gas Turbines as AI Power Crunch Bites

Anthropic is spending $3.4 billion on natural gas turbines — a striking break from a company that has built its business on renting rather than buying physical infrastructure. The generators, made by Caterpillar, can produce up to 1.7 gigawatts of electricity, according to a Financial Times report.

The purchase lands at a delicate moment. Anthropic is planning to go public this year, and the deal signals how sharply the calculus around compute and power has shifted for AI companies.

Why would a renter suddenly buy?

Anthropic's own filings show how committed it has been to renting capacity. In its S-1 filing in May, the company disclosed it is paying SpaceX subsidiary xAI $1.25 billion per month through May 2029 to use xAI's computing power.

"We expect to enter into additional similar services contracts," Anthropic stated in the filing — in plain terms, more deals to rent computing power rather than own it.

The turbine purchase suggests that strategy has hit a wall. Demand for compute is ramping up, and the market for power has grown increasingly uncertain. The backlog for natural gas turbines now stretches into the early 2030s, and queues to connect to the electrical grid can be just as long. Anthropic's $3.4 billion outlay looks like a last resort.

How did the deal actually come together?

The transaction had an unusual twist. Equipment supplier OnePWR had originally ordered the Caterpillar generators a couple of years ago but couldn't find financing to complete the purchase, according to the report.

Anthropic had planned to buy the turbines from OnePWR. Instead, it went directly to Caterpillar, the manufacturer. It's not clear why OnePWR was unable to secure financing despite having Anthropic as an apparent interested customer.

Whatever the reason, Anthropic likely wanted to keep the generating capacity for itself rather than risk a competitor snapping it up. In a market where turbine backlogs run into the next decade, secured capacity is a competitive weapon.

Is Anthropic alone in this rush?

No — it's joining an industry-wide frenzy. AI companies have been ramping up purchases of natural gas equipment and supplies in recent years. Google, Amazon, Microsoft, and Meta have all announced plans to build massive natural gas power plants to fuel their data centers on site, rather than drawing from the public grid.

The binge has given a second wind to fracking, the drilling method used to extract natural gas from underground rock. The scale of the buildout is enormous: if it proceeds as planned, U.S. data centers alone could consume more natural gas than Germany and Japan combined by 2035.

What's the risk for Anthropic?

Price exposure is the obvious one. Heavy reliance on natural gas leaves hyperscalers vulnerable to price fluctuations in a commodity market that AI demand itself is tightening. One analyst expects that prices could more than triple by the end of the decade in some markets.

If that forecast holds, Anthropic — a company that historically avoided owning physical assets — might have a serious case of buyer's remorse over its $3.4 billion bet. For now, though, the deal locks in up to 1.7 gigawatts of capacity in a market where waiting until the early 2030s is the alternative.