Z.ai launches GLM-5.3 with claimed 50% gain on coding benchmark

Z.ai, the international brand of Chinese AI company Zhipu, launched GLM-5.3, an update focused on coding, long-horizon tasks, and cybersecurity, claiming a 50% higher score than GLM-5.2 on its internal Z.ai Code Bench. The model, based on the same base model as GLM-5.2, also achieved leading open-source results on Terminal-Bench 3.0 and Agents’ Last Exam, with weights to be released two weeks after launch following additional safety evaluation.

Z.ai, the international brand of Chinese AI company Zhipu, has launched GLM-5.3, an update focused on coding, long-horizon tasks and cybersecurity. The model uses the same base model as GLM-5.2, with the company attributing the latest gains to post-training. Z.ai said GLM-5.3 scored 50% higher than GLM-5.2 on its internal Z.ai Code Bench and reached leading open-source results on Terminal-Bench 3.0 and Agents’ Last Exam. It also reported stronger vulnerability-discovery and exploitation performance, and said the model weights will be released two weeks after launch following additional safety evaluation. Z.ai https://z.ai/blog/glm-5.3