The most recent generative AI model developed by Elon Musk's AI business, X.ai, is called Grok-1.5. According to a blog post, Grok-1.5 will power the Grok chatbot on social network X "in the coming days." Based on benchmark results and specifications that have been made public, Grok-1.5 looks to be a quantifiable improvement over Grok-1.