A layoff notice viewed by CNBC was signed by Doug Weibel, who took over as the head of Grand Challenge after its founding leader, Babak Parviz, left in 2022 and joined Madrona Venture Group.

Margaret Callahan, an Amazon spokesperson, confirmed the layoffs and the existence of the project in a statement to CNBC. Roughly 100 employees will be laid off, Callahan confirmed.