Elon Musk’s xAI’s chatbot Grok will be available to X’s Premium subscribers “later this week”. After making the rival to OpenAI’s ChatGPT available to X’s Premium+ subscribers since its early beta stages, the billionaire businessman is making Grok more accessible by bringing it to Premium users. Musk posted to X alongside a video explaining how to start a conversation with Grok: “Later this week, Grok will be enabled for all premium subscribers (not just premium+).” It costs $8 a month or $84 a year to upgrade to a Premium account. The move comes a week after the company open sourced Grok. The…