Prometheus, the industrial artificial-intelligence startup co-led by Jeff Bezos, raised $12 billion in a Series B round announced Friday at a valuation of $41 billion. JPMorgan Chase, Goldman Sachs, BlackRock, DST Global and Arch Venture Partners joined the financing, which lifts total funding in the seven-month-old company above $18 billion.
The round marks Bezos's first operational technology role since he stepped down as Amazon's chief executive in 2021. Prometheus is pitching what Bezos and co-founder Vik Bajaj, a former Alphabet Verily executive and Stanford medical professor, call "physical AI" — models trained on experimental data, robotics interactions and engineering workflows rather than on text and images alone. The thesis: software that understands physics can compress the years-long cycle between an engineer's idea and a finished product.
The pitch
Bezos framed the problem in mechanical terms. "If you go to a current jet engine manufacturer and say you want the exact same engine but with 10% more thrust, it could be a 10-year program," he said. The company is building tools to "empower engineers to compress that cycle time and make that dream-build loop be 10 times faster or even more." Bajaj put it more bluntly: "The pace of our physical creation right now is nowhere near the pace of human imagination."
What it builds
Prometheus targets the earliest stages of manufacturing — prototyping, equipment tuning and workflow design before full-scale production. Bezos and Bajaj describe the long-term goal as an "artificial general engineer." The company employs about 150 people across San Francisco, London and Zurich, and has recruited from OpenAI, Google DeepMind and Nvidia.
Bezos returns
The Amazon founder said the technology pulled him off the sidelines. "I became so impressed by what was happening and the potential that I decided I couldn't sit on the sidelines and I needed to jump in with both feet," he said. Prometheus operates independently of Amazon and Blue Origin, though Bezos's rocket company is already a customer case study. He also holds stakes in robotics firms Physical Intelligence and Generalist AI.
The skeptics, mostly absent
Independent skepticism is hard to find in today's coverage. Friday's reports relay the company's own framing without quoting outside analysts on the $41 billion price tag — a valuation that puts a 150-person startup at roughly $273 million per employee — or on whether physical-AI models trained on experimental data will generalize the way large language models did. The skeptic's case, articulated yesterday around Oracle's $20 billion debt raise, is that AI valuations are running ahead of revenue. Prometheus has disclosed no revenue.
The next test will be customers. Bezos has said Blue Origin and, eventually, Amazon could buy the software. Whether other manufacturers will pay to shave years off a jet-engine program is the bet investors just sized at $41 billion.