Z.AI (02513) officially released GLM-5.3, maintaining its top position in programming capabilities in the open-source rankings.

On August 14, Z.AI (02513) officially released GLM-5.3. It was reported that compared to GLM-5.2, the base model of GLM-5.3 remains unchanged, but the model's intelligence upper limit has been greatly improved through extreme post-training scaling: dozens of times better performance in long-range task environments, a richer and more diverse range of environment types, and an extraordinarily long post-training duration. Additionally, Z.AI will open the model weights two weeks after the release, following the completion of safety assessments and model fortification. Compared to its predecessor, GLM-5.3 exhibits stronger programming capabilities. GLM-5.3 is the most powerful open-source model in terms of programming ability, showing a 50% improvement in internal self-built assessment tests compared to GLM-5.2, and achieving the top open-source score in public benchmark tests, including Terminal Bench 3.0 and Agents' Last Exam (CLI). In terms of cybersecurity capabilities, GLM-5.3 performs on par with Mythos 5 in security tasks such as white-box code review and vulnerability detection, demonstrating strong potential for cybersecurity defense scenarios; furthermore, all the mentioned enhancements stem from post-training. Based on IndexShare, SAO, and the continuously evolving next-generation Slime framework, Z.AI is efficiently advancing reinforcement learning on the same base as GLM-5.2, and it is likely that the intelligence upper limit of this base has not yet been fully explored. As of July 2026, Z.AI's ARR (Annual Recurring Revenue) has reached a scale of $1 billion, making it the first domestic large model vendor to achieve this business milestone. This iteration is expected to not only affirm Z.AI's profound technological accumulation in areas such as agent intelligence, post-training scaling, and coding but also further broaden the company's MaaS commercialization space, solidifying the industrial foundation of autonomous and controllable AI bases in the country.