
Z.ai Releases GLM-5.3 With Big Coding and Cyber Gains, Open Weights Coming in Two Weeks
Z.ai released GLM-5.3 on August 14, 2026, with major improvements in coding and cybersecurity, achieved through scaled-up post-training rather than architecture changes. The model shows significant gains on long-horizon benchmarks like Terminal-Bench 3.0 and DeepSWE, and unexpectedly strong cyber exploitation capabilities. Open weights will be released in about two weeks after safety evaluation.









