Ina FriedSam Altman at the AI Action Summit in Paris. Photo: Ina Fried/AxiosOpenAI is not for sale — and particularly not to Elon Musk, CEO Sam Altman told Axios on the sidelines of the AI Action Summit in Paris.Why it matters: Altman's comments come one day after his increasingly heated rival Musk made a shock $97.4 billion offer for OpenAI's assets, potentially changing the narrative around the technology's future.What he's saying: "There's been like versions of Elon trying to, you know, someh...