Z.ai Introduces GLM-5.3 for Coding and Cyber Defense
Z.ai released the open model post-trained on its 743B base for coding and agentic tasks.
Z.ai announced GLM-5.3 as an open model post-trained on the 743B base model. The company stated it delivers top-tier coding and agentic capabilities along with a major leap in cybersecurity benchmarks among open models. Z.ai added that the model improves on GLM-5.2 with better results using fewer output tokens. The announcement pointed to an accompanying tech blog and noted immediate availability through the GLM Coding Plan and ZCode platforms.
Introducing GLM-5.3: Built to Code. Ready for Cyber Defense. - Top-tier coding and agentic capabilities, achieved through post-training on the 743B base model - A major leap in cybersecurity, setting a new standard among open models Tech Blog:
