Elon Musk’s xAI startup has released an upgraded version of the Grok chatbot on X, which is a significant step forward from the previous model. The new model, Grok-2, is more intuitive, steerable, and versatile, and is available with a Premium or Premium+ X subscription. It has already outperformed models from other big names in AI, according to the Large Model Systems Organization (LMSYS) chatbot arena.