xAI's model built by Elon Musk's team, integrated directly into X (Twitter). The main draw - real-time access to everything happening on the platform. Ask it about breaking news, trending topics, or what crypto twitter is panicking about today and it pulls live data. Content filters are minimal, so it'll discuss topics that other models politely refuse. Grok 3 is surprisingly strong at coding and reasoning - it competed well in benchmarks that matter. If you already pay for X Premium ($8-16/month), you get Grok included, making it the cheapest way to access a top-tier AI. SuperGrok plan exists for heavier users. Free tier available with basic limits.