Kevin Weil, the former chief product officer of OpenAI, is seeking a valuation of at least $750 million for a new AI science startup and aims to raise $150 million, according to three people with knowledge of the discussions. The fundraising terms are not final and could still change. The startup's precise plans were not learned, but sources said Weil has pitched it as a way to gather scientific data for AI models. The effort adds to a broader shift in artificial intelligence from chatbot products toward science applications, with former OpenAI and Google researchers and executives launching companies focused on areas such as drug design, autonomous experiments and AI systems for scientific workflows.