Jeff Bezos's Prometheus raises $12B to build an 'artificial general engineer' for the physical world

Overview

Prometheus, a physical-AI startup co-founded and now co-led by Jeff Bezos, raised $12 billion in a Series B round at a $41 billion valuation. The company is building what it calls an "artificial general engineer," AI software meant to automate the design and manufacturing of complex physical products such as jet engines, chips, and drug compounds. The round marks Bezos's first operational chief executive role since he stepped down as Amazon CEO in 2021, and lifts the company's total funding past $18 billion.

Key Takeaways

Prometheus raised $12 billion in a Series B round at a $41 billion valuation, one of the largest single financings tied to physical AI.
The startup is building an "artificial general engineer," AI software to design and help manufacture complex physical systems rather than text or images.
Jeff Bezos co-founded the company with Vik Bajaj and now serves as co-CEO, his first chief executive role since leaving Amazon in 2021.
Named backers include JPMorgan Chase, Goldman Sachs, BlackRock, DST Global, and Arch Venture Partners.
Target industries span computing, aerospace, automotive, advanced manufacturing, and drug discovery.
Bezos argued the technology would create labor scarcity and lift living standards rather than eliminate work.

Stats & Key Facts

#$12 billion raised in the new Series B funding round.
#$41 billion post-money valuation for Prometheus.
#$6.2 billion raised in the prior Series A round in late 2025, with Bezos the largest backer.
#More than $18 billion in total funding raised to date.
#150 employees across offices in San Francisco, London, and Zurich.
#Bezos's first CEO role since stepping down at Amazon in 2021.

A $12 Billion Series B at a $41 Billion Valuation

The new financing roughly doubles the capital Prometheus had raised before.

›The Series B round totals $12 billion and values the company at $41 billion post-money.
›It follows a $6.2 billion Series A in late 2025, bringing total funding past $18 billion.
›The size places Prometheus among the most heavily capitalized startups in the physical-AI field.

What an "Artificial General Engineer" Means

The product aims to automate engineering work in the real world, not just digital tasks.

Prometheus describes its goal as an "artificial general engineer," software that designs and helps manufacture complex physical systems. Where most well-known AI tools produce text, code, or images, this software is meant to work on hardware: components, machines, and chemical compounds.

The founders point to examples such as jet engines, semiconductor chips, and drug molecules. The pitch is that AI trained on physics, materials, and engineering data shortens the slow cycle of designing, testing, and building real products.

Bezos Returns as Co-CEO Alongside Vik Bajaj

The round brings Bezos back into a hands-on leadership seat.

Bezos co-founded Prometheus with Vik Bajaj, a scientist who earlier co-founded Verily, the life sciences unit inside Google's parent company. Bezos started as a founding investor and then took a co-CEO role, his first time running a company day to day since he stepped down as Amazon's chief executive in 2021.

He has said he grew impressed enough by the work that he decided to join with both feet rather than stay a backer. The dual-CEO structure pairs his operating background with Bajaj's record in applied science.

Wall Street and Venture Backers in the Round

The investor list blends large financial institutions with technology-focused funds.

›JPMorgan Chase, Goldman Sachs, and BlackRock joined from the banking and asset-management side.
›DST Global and Arch Venture Partners brought technology and science investing experience.
›Bezos was the single largest backer of the earlier $6.2 billion Series A.

Why So Much Money Goes to Computing

Training models for the physical world is computing-intensive.

Bezos indicated a large share of the new capital will pay for the heavy computing the company's models require. Simulating physics and engineering at scale demands large numbers of specialized chips and the data centers to run them.

That cost profile helps explain the round's size. Building AI for hardware and chemistry involves far more simulation than producing language or images, so the compute bill climbs quickly.

Target Industries: Aerospace, Chips, Cars, and Drugs

The company aims at sectors where engineering cycles are long and expensive.

›Computing and semiconductors, where chip design is slow and capital-heavy.
›Aerospace and automotive, including engines and vehicle systems.
›Advanced manufacturing, covering machines and industrial components.
›Drug discovery, where the software targets new compounds.

Bezos on Jobs, Labor Scarcity, and Living Standards

He used the announcement to push back on fears that AI will erase work.

Bezos argued that big productivity gains would create labor scarcity, a situation where demand for workers outstrips supply, rather than mass unemployment. He framed strong productivity as the route to higher living standards across the economy.

He gave a concrete picture of the change, suggesting some two-earner households might shift to one earner and that some people working overtime might stop. His view is that more output per worker raises wages and frees up time rather than removing the need for people.

Frequently Asked Questions

What is Prometheus building?

It is building an "artificial general engineer," AI software meant to automate the design and manufacturing of complex physical systems such as jet engines, semiconductor chips, and drug compounds.

How much did Prometheus raise and at what valuation?

The company raised $12 billion in a Series B round at a $41 billion valuation, lifting its total funding past $18 billion.

What is Jeff Bezos's role at Prometheus?

Bezos co-founded the company with Vik Bajaj and now serves as co-CEO. It is his first chief executive role since he stepped down as Amazon CEO in 2021.

Who invested in the funding round?

Named investors include JPMorgan Chase, Goldman Sachs, BlackRock, DST Global, and Arch Venture Partners. Bezos was the largest backer of the earlier Series A.

What did Bezos say about AI and jobs?

He predicted the technology would create labor scarcity, where demand for workers exceeds supply, and said higher productivity would raise living standards rather than cause mass job loss.

The raise signals strong investor confidence that AI applied to heavy engineering and manufacturing is a large opportunity. With Bezos back in an operating chair, Prometheus now sits among the most heavily funded bets on bringing AI into the physical world.