Cambridge-based CuspAI is set to raise $400M in a new round backed by Jeff Bezos’s family office, Bezos Expeditions, alongside Kleiner Perkins, per the Financial Times.

The deal, with term sheets signed but not yet finalised, would raise CuspAI’s valuation to $2.6 billion, up from $520 million just nine months ago.

This news comes just six days after Bezos introduced Prometheus, his $41 billion physical AI lab, showing his growing commitment to real-world AI.

Jeff Bezos built Amazon, believing that distribution was the toughest challenge in commerce. Now, he seems to think materials discovery is the biggest challenge in physical AI, and he’s betting that this two-year-old Cambridge startup could solve it.

According to the Financial Times, CuspAI is set to raise $400M in a new funding round. Term sheets have been signed, though the deal is not yet closed. Investors in the round include Silicon Valley venture firm Kleiner Perkins and Bezos Expeditions, the Amazon founder’s family office. The raise would quadruple CuspAI’s valuation to approximately $2.6B.