released February 2025 by xAI, skyrocketed to #2 with 190% YoY growth and 1.9 billion visits. Trained on 100k H100 GPUs using live X data, it “understands memes” and answers in 17 styles (e.g., Pirate, Socratic, Roast). Unique “Fun Mode” toggle removes all filters—perfect for creative writing or spicy debates. Real-time X search pulls the freshest posts, videos, and trends; it even live-streams SpaceX launches. Grok 3 Vision analyzes images 42% faster than GPT-4o and generates 1080p video clips up to 10 seconds. Free tier offers 25 messages/2h; SuperGrok ($8/mo) removes limits and adds 200-tool calls/day. In Chatbot Arena it sits at #1 for math (96.2%) and #2 overall. Developers praise the Grok API’s 8k output tokens and built-in function calling. Integrated into every X reply, it’s the only chatbot that feels native to social media. 1.9 billion visits and 2.1 million app reviews confirm: Grok is the fastest-rising star of 2025.