Flapping Airplanes Lands $1B Series A at $6B Valuation, Betting on Data-Efficient AI

Flapping Airplanes Inc., an artificial intelligence research lab, has announced a $1 billion funding round roughly one year after its founding. Bloomberg reported that investors have valued the startup at $6 billion. The lab has not yet released any commercial product to market.

The company's core mission centers on developing AI models capable of learning from significantly smaller datasets than the frontier models in use today. During its first year, Flapping Airplanes focused heavily on creating new primitives for graphics processing units. According to the company's statement on X, this work has produced new algorithms positioned to "dramatically reshape AI's cost structure."

The founders have created what they call "the world's most complete megakernel framework." Index Ventures Management explained in its post about the round that a megakernel executes an entire program on a GPU as a single kernel, eliminating wasted processing time between operations. Flapping Airplanes claims its framework can simultaneously run a complete training cycle, handle inference serving and execute a video game within a single kernel, allowing memory-bound inference to run in parallel with compute-bound training on the same chip.

Co-founder Asher Spector, who holds a doctorate in statistics from Stanford University, told TechCrunch: "A model that's a million times more data efficient is probably a million times easier to put into the economy."

The Founding Team

Asher Spector's brother, Ben Spector, serves as chief executive. Ben founded Prod, a student-operated startup accelerator, while studying at the Massachusetts Institute of Technology and is currently pursuing a doctorate in computer science at Stanford. During 2024, he was the lead author on ThunderKittens, an open-source toolkit designed for creating efficient GPU kernels. Aidan Smith, the third co-founder and a Thiel Fellow, previously worked at Neuralink Corp. while in college. Index describes the team as comprising roughly two dozen people working in-person in San Francisco.

Investors and Funding Details

Index Ventures Management and Lux Capital Management jointly led the Series A round, with Mark Xu from Index joining the company's board. Sequoia Capital Operations and GV Management Co. participated in the $180 million seed round in January and returned for this funding round. Additional institutional investors include Kleiner Perkins Caufield & Byers, Valor Equity Partners LP, Atreides Management LP, Jump Trading Group, XTX Ventures and Nvidia Corp.

Index partners Xu and Shardul Shah contended that demand for AI capabilities will persistently exceed the available supply of computational resources and training data. They identified robotics, trading and life sciences as sectors particularly in need of more efficient AI systems.

According to Bloomberg, the company's valuation has increased roughly fourfold in the nine months since the seed round closed. Total investor commitments to Flapping Airplanes now stand at $1.18 billion.