Grok is the AI assistant from xAI, Elon Musk's AI company, with a personality that leans into humor and directness. Unlike most AI assistants, Grok has real-time access to posts on X (formerly Twitter), making it uniquely capable for questions about trending events, public discourse, and breaking news. Grok 2 and Grok 3 represent meaningful capability improvements, competing seriously with GPT-4o on coding and reasoning tasks. The model's willingness to engage with edgier questions sets it apart from more conservatively filtered competitors. Available to X Premium+ subscribers, Grok is embedded directly into X's interface. For users already on the platform, it's a useful tool for real-time research. For everyone else, the web app works standalone.