Grok 4.20 is xAI's next-generation AI chatbot featuring a four-agent multi-agent collaborative architecture that enables parallel reasoning and real-time discussion between specialized agents. The model is positioned as an order of magnitude smarter and faster than Grok 4, with native multimodal capabilities supporting text, image, and video input. It includes a 256K+ token context window (up to 2M in some versions), real-time integration with X platform data, and specialized capabilities for medical diagnosis, engineering analysis, and image/video generation through Grok Imagine. The rapid learning architecture enables continuous weekly improvements during its public beta phase.