Z.ai Launches GLM-5.3 With Frontier Coding and a Cyber Capability That Outgrew Its Training
Z.ai released GLM-5.3 on August 14, 2026, an update the company says keeps the same base model as GLM-5.2 and derives every capability gain from scaled-up post-training. The headline results are in coding, where Z.ai reports the model is the strongest open-weights system it has measured, and in cybersecurity, where the company says capability grew faster than it anticipated as training scaled. The weights are not yet public: Z.ai says it will release them in about two weeks, after safety…
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Z.ai released GLM-5.3 on August 14, 2026, an update the company says keeps the same base model as GLM-5.2 and derives every capability gain from scaled-up post-training. The headline results are in coding, where Z.ai reports the model is the strongest open-weights system it has measured, and in cybersecurity, where the company says capability grew faster than it anticipated as training scaled. The weights are not yet public: Z.ai says it will release them in about two weeks, after safety…