Flapping Airplanes raises $1 billion Series A led by Index
AI lab Flapping Airplanes raises a $1 billion Series A led by Index Ventures, which had already led its seed round earlier this year.
By GennnAi··1 min read
Index partner Mark Xu joins the board. Founded by Ben, Asher and Aidan, the company has about two dozen people, all working in San Francisco. It works across the whole stack, from GPU kernels to inference, and develops megakernels that run an entire program on a GPU as a single kernel to get more from each chip. Index argues efficiency will decide the winners.
Source: Index Ventures, published on October 21, 2026.