Grok 4 is xAI’s latest advanced reasoning model featuring a **256,000 token context window** via API, **multimodal input** capabilities (handling both text and images), and supports parallel tool calling with structured outputs.

Built on xAI's **Colossus supercomputer** using 200,000 Nvidia GPUs, Grok 4 demonstrates high levels of logical and scientific reasoning, as well as improved efficiency in training and expanded world knowledge. The model offers **real-time search integration**, specializes in code-related tasks, and is accessible through various API and SDK options with a tiered pricing system for developers.

Grok 4 is available to SuperGrok and Premium+ subscribers, and it is widely used in applications ranging from coding assistants to chatbots.