Anthropic couldn't rent enough power, so it bought someone else's gas generators

The usual way an AI company gets electricity is to rent it. You sign a lease with a cloud provider or a data center operator, they deal with the utility, and you never have to think about turbines. Anthropic has done exactly that for years. It just stopped.

In late September, according to a Financial Times report picked up by TechCrunch, Techzine and VKTR, Anthropic bought $3.4 billion worth of heavy-duty Caterpillar gas generators. Together they can produce up to 1.7 gigawatts. That's enough capacity, on paper, for a mid-sized city. The news surfaced on November 8 and 9. None of the reports carried a comment from Anthropic, and nobody has said where the machines will go.

"Historically, Anthropic has preferred to rent rather than buy," wrote TechCrunch climate reporter Tim De Chant. His verdict on the change was short: "Anthropic's purchase looks like a last resort."

The order nobody could pay for

The generators weren't Anthropic's to begin with. A San Antonio equipment supplier called OnePWR Solutions ordered them from Caterpillar about two years ago, according to the reports, then couldn't line up the financing to close the deal. Anthropic had originally planned to be a OnePWR customer and buy power from it. Instead it took over the orders, along with the engineering and construction work needed to install them.

Techzine is careful to say what didn't happen. Anthropic did not buy OnePWR. "No OnePWR employees transferred to Anthropic," it reported. The startup got a buyer for its stranded order book. Anthropic got something money normally can't buy quickly, which is a place in the queue.

That queue is the real story. TechCrunch reports that backlogs for gas turbines now stretch into the early 2030s. Techzine notes the engines in this deal were ordered before prices rose and will be delivered over the next two years. If you want gas power before the end of the decade, buying someone else's reservation may be the only route.

VKTR found another detail. Investment bank Piper Sandler lists a $3.4 billion transaction on its site in which it advised OnePWR on selling its power generation platform to a frontier AI lab. It does not name the lab.

How big is $3.4 billion of generators?

Big enough to show up in Caterpillar's numbers. VKTR reports Caterpillar's power generation sales rose 30% in the third quarter to $3.42 billion, driven by turbines and large engines for data centers. One AI lab's order is, in rough terms, the size of an entire quarter of that business. VKTR's own math puts the deal at around $2 million per megawatt, installation included, and calls it the largest known single purchase of power equipment by an AI lab.

Everyone is burning gas now

Anthropic is late to this, not early. Techzine reports that xAI, now a SpaceX subsidiary, bought $2 billion of mobile gas turbines earlier this year. VKTR notes that xAI's turbines near Memphis drew an NAACP lawsuit over air quality. TechCrunch says Google, Amazon, Microsoft and Meta have all announced plans to build large gas plants on site at data centers. "Anthropic isn't the only one cutting out the middleman," Techzine wrote.

De Chant's piece puts some scale on it. U.S. data centers could burn more natural gas than Germany and Japan combined by 2035, according to analysis TechCrunch linked. The rush, he writes, has given fracking a second wind, and one analyst expects some prices could more than triple by the end of the decade.

There's an awkward fit with how AI companies like to talk about themselves. In February, according to VKTR, Anthropic pledged to bring new power generation online to match its data centers' electricity needs, and to cover consumer price increases tied to its facilities. Owning 1.7 gigawatts of gas engines does technically meet the first half of that. It's just not the version anyone pictured when tech companies were signing wind and solar deals a few years ago.

VKTR raises a less obvious consequence. When inference runs on gas generators an AI company owns, those emissions end up in the Scope 3 reporting of every business that buys the model. Companies that picked a model partly on green credentials may want to reread their contracts.

Control, at a price

The timing matters. Anthropic filed for its IPO in October, and VKTR reports the S-1 lists constraints on critical inputs for compute as a key risk. VKTR also reports that Anthropic's payments to SpaceX for leased compute started at $1.25 billion a month. Outlets disagree on how high that figure goes by year-end, so treat the exact trajectory with care. Either way, the bill for renting compute is large, and it depends on someone else having the power to run it.

Owning generators changes who carries that risk. "Owning generation gives Anthropic more control but also exposes it to fuel prices, permitting and local opposition," VKTR wrote. Each of those has already bitten xAI in Memphis.

So the company that built its brand on careful, safety-first AI now owns a fleet of fossil fuel engines it bought secondhand from a supplier that ran out of money. Nobody has said where they will run. The neighbours will find out when the permit applications land.

Sources: TechCrunch, Techzine, VKTR.