Crusoe, a Denver-based startup specializing in AI data centers, has scrapped plans to use a new line of stationary power plants from fellow Denver-based company Boom Supersonic. Crusoe, which began as a bitcoin mining company using excess natural gas from oil fields, has grown into one of the largest builders of AI data centers in the U.S. It recently raised $3.9 billion, part of which will be used to power its massive campus in Abilene, Texas, which provides computing power to companies like OpenAI. Boom Supersonic, best known for developing a supersonic passenger jet called Overture, launched a new business last year to sell a version of its jet engine as a power source for stationary plants. The engine, called Superpower, shares about 80% of its parts with the Symphony engine used in the Overture jet. Crusoe had initially signed on as Boom’s first customer, agreeing to purchase 29 of these 42-megawatt turbines for $1.25 billion, with deliveries expected to start in 2027. However, the deal has since collapsed, according to Boom’s CEO, Blake Scholl. In a recent post on X, Scholl acknowledged the change, saying that turbines are no longer a primary power source for Crusoe’s near-term projects, such as the Abilene campus. He noted that Boom still plans to deliver 250 megawatts of Superpower turbines to other customers in 2024 and aims for 1 gigawatt in 2028. Scholl also expressed appreciation for Crusoe’s role in helping shape the Superpower engine and wished them continued success. Crusoe confirmed the partnership’s end in a statement, saying it is now using a variety of energy sources—such as wind, solar, batteries, and the grid—to power its growing network of AI data centers. The company emphasized its flexibility in choosing the most suitable energy solutions for each site. While Boom had been a valuable partner, it is no longer the right fit for Crusoe’s current needs. Losing a major launch customer like Crusoe could be a setback for Boom, which raised $300 million last year to commercialize its stationary power plant business. The goal was to use profits from that venture to fund the development of the Overture jet. However, Scholl was unavailable for further comment before this article was published, and TechCrunch will update if he responds.