Alongside meetings with Apple boss Tim Cook and Google chief Sundar Pichai, Vestager is also set to hold talks with two top executives from OpenAI.The launch of the ChatGPT chatbot in November 2023 — which became at the time the fastest-adopted app — marked the popular arrival of the AI revolution.Microsoft last year pledged to invest $13 billion in OpenAI and got a seat on the board after an abortive boardroom coup against CEO Sam Altman.Britain’s competition watchdog last month also said it was looking into whether the partnership between Microsoft and OpenAI resembles a merger.