"Elon Musk and Sam Altman criticized each other in new posts on X," reports CNBC, "highlighting the billionaires' long-standing tussle over OpenAI's evolution."

This week, SpaceX released the Grok 4.5 generative AI model, while OpenAI debuted its own GPT-5.6 Sol. For days, Musk and Altman have hyped up their respective releases, but on Saturday the rivalry got personal. In response to a post about Apple filing suit against OpenAI on Friday over alleged theft of trade secrets, Musk wrote, "Scam Altman strikes again ...." Minutes after his post, Musk doubled down, writing, "He takes scamming to a whole new level." Next, Musk published a photo of Altman that included the words, "I'm doing this...