
What is GLM and how it can help you be more productive
|AI
GLM isn't just another open-weight chatbot anymore: what started as Tsinghua research in 2021 became Z.AI, China's first publicly listed AI lab, with a full model family for coding, agents, and multimodal work. In 2026 GLM is best known for GLM-5.3: a 743-billion-parameter MoE flagship with a 1-million-token window, always-on reasoning, and emergent cyber capabilities, plus the multimodal GLM-5.3-Flash. In this guide, we explain what GLM is, how the GLM-5.3 and Flash models fit together, what ZCode and the Coding Plan can do, what the plans cost, and how to use it well - for coding, agents, documents, and productivity.







