GLM-5.2

GLM-5.2 is a flagship model developed by Zhipu AI (Z.AI) for the era of long-horizon tasks. It has approximately 753 billion parameters, supports a truly usable context window of up to 1 million tokens, and can generate up to 128K tokens in a single response. GLM-5.2 delivers significant improvements in advanced reasoning, project-scale code understanding, complex system engineering, and long-running agent tasks. It can maintain architectural constraints, API specifications, directory structures, and historical decisions across extended workflows, reducing context drift and goal forgetting. With state-of-the-art long-horizon coding performance among open-source models, GLM-5.2 is well-suited for large-scale software development, automated research, performance optimization, enterprise applications, and autonomous coding agents.