Bezos's Project Prometheus Closes a $12B Series B at a $41B Valuation — to Build an 'Artificial General Engineer'

Project Prometheus, the industrial-AI startup co-founded by Jeff Bezos, has closed a $12 billion Series B at a $41 billion valuation, the company confirmed on June 11. The raise lands roughly seven months after Prometheus launched in November with $6.2 billion in funding, and it vaults the still-pre-product company past the roughly $38 billion mark reported for its earlier round — making it one of the most valuable startups ever assembled this early in its life.

Bezos, who stepped down as Amazon's CEO in 2021, serves as co-CEO alongside Vik Bajaj, a Stanford School of Medicine professor who previously co-founded Alphabet's life-sciences arm Verily. Their pitch is deliberately unfashionable for an AI company: Prometheus, Bezos has said, has "nothing to do with robotics." Instead the company is building what it calls an artificial general engineer — AI models aimed squarely at the physical world, from engineering and manufacturing to drug design.

The ambition is to rearchitect how physical things get made, whether that means jet engines, medical devices, or consumer electronics. Where most of the current AI boom has chased bits — chatbots, code, images — Prometheus is betting the larger prize is atoms: collapsing the slow, expensive cycle of designing, simulating, and validating real hardware into something a model can accelerate by orders of magnitude.

That thesis has clearly resonated with capital. A $41 billion valuation for a company with no shipped product is a striking marker of how aggressively investors are now backing "physical" and applied AI, a category that also includes robotics-foundation-model startups and Nvidia's sprawling Cosmos and Isaac stack. Prometheus is staking out a distinct lane within it — not the robots that act in the world, but the design intelligence that decides what gets built in the first place.

For Bezos, the round cements a second technology act that now spans space, with Blue Origin, and the physical-AI frontier with Prometheus. The open question is execution: turning a marquee founding team and a war chest into a model that engineers, drugmakers, and manufacturers actually adopt — and justifying a valuation that already assumes it works.