Z.ai

Z.ai (chat.z.ai) is an AI assistant and chatbot platform powered by the GLM family of large language models, developed by Knowledge Atlas Technology (formerly Zhipu AI). It enables users to build websites, write and debug code, generate presentation slides, draft professional content, and handle long-horizon agentic tasks through a conversational interface. The platform offers multilingual support including strong Chinese-language capabilities, a large context window (up to 1M tokens with GLM-5.2), and OpenAI-compatible APIs for developers. It features a free tier for basic use and paid plans (Lite and GLM Coding Plan) for advanced and high-volume usage.