Todd Spangler NY Digital Editor X, the social network formerly known as Twitter owned by mega-billionaire tech mogul Elon Musk, has turned on a setting indicating it intends to use its millions of users’ posts and interactions to train Grok, the AI assistant developed by another one of Musk’s companies. “To continuously improve your experience, we may utilize your X posts as well as your user interactions, inputs and results with Grok for training and fine-tuning purposes,” says a notice on X’s settings web page.