Amazon SVP Rohit Prasad speaks at a Madrona event in Seattle in October. (GeekWire File Photo / Todd Bishop) Rohit Prasad, the executive who has led Amazon’s artificial intelligence initiatives and overseen the creation of its homegrown Nova AI models, is leaving the company at the end of the year. In a memo Wednesday morning, Amazon CEO Andy Jassy named Peter DeSantis, a 27-year company veteran and top cloud infrastructure executive, to lead a new organization that combines its Nova and model r...