Anthropic pays $3.4B for 1.7GW of gas-fired generators, taking over OnePWR's Caterpillar orders

What's the deal? Anthropic agreed in late September to pay about $3.4 billion for commitments covering 1.7 gigawatts of heavy-duty gas-fired generators, the Financial Times reported on 8 November, citing a person familiar with the matter. The FT calls it the largest known single purchase of power-generation equipment by an AI lab.

How it works: The seller is OnePWR Solutions, a San Antonio, Texas developer of behind-the-meter power plants and microgrids founded in 2025. OnePWR had ordered the generators from Caterpillar about two years ago but needed financing to complete the purchase. Anthropic first planned to become a OnePWR customer, then took over the equipment orders instead, together with the engineering and construction capability needed to install them. Anthropic did not buy OnePWR, and none of its staff moved across. Investment bank Piper Sandler lists itself as OnePWR's exclusive financial adviser on a September 2026, $3.4 billion sale of its power generation platform to "a frontier AI lab".

Why now? Turbines and large generators face multi-year lead times as data-centre demand surges. In its amended S-1 filed on 2 November, Anthropic said certain planned data centre facilities rely on dedicated on-site natural gas-fired generation, exposing it to fuel price and supply risk, and listed turbines and generators among equipment facing extended delivery timelines and allocation constraints. The same filing reported about $895 billion in commitments, mostly for compute and infrastructure.

What we don't know: The sites, delivery schedule and how the $3.4 billion splits between equipment and installation have not been disclosed. Anthropic and OnePWR declined to comment to the FT, and Reuters said it could not immediately verify the report.

Sources: Financial Times; Reuters via CNBC; Piper Sandler; WebProNews on the S-1/A