OpenAI is planning to turn ChatGPT into a “super app”—an all-purpose AI interface that brings OpenAI’s key products together—as it heads toward an upcoming IPO. At the center of that push is Thibault Sottiaux, the former head of Codex, who has recently been promoted to oversee OpenAI’s core product platform for consumer, business, and developer customers. At the Viva Tech technology conference in Paris, Sottiaux told Fortune that the company planned to evolve ChatGPT from a conversational tool into a more personal assistant that remembers what users care about and gets better the more it learns from them. The end…