Z.ai · MoE Architecture
GLM-5.3
Launched 14 August on the same 743B base as GLM-5.2 - roughly 40B active - with every gain coming from further RL and training-environment design rather than a new pre-train. Takes CyberGym at 84.5%, ahead of Mythos 5 (83.8) and GPT-5.6 Sol (83.6), and reports 2,436 confirmed vulnerabilities across 269 open-source projects. Weights staged for late August.
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