Z.ai Launches GLM-5.3, Built For Coding And Cyber Defense
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Z.ai Launches GLM-5.3, Built For Coding And Cyber Defense
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Summary Report
Z.ai's GLM-5.3 gets its gains purely from deeper post-training on the same 743B base model, jumping Terminal-Bench 3.0 from 4.6 to 28.3.
- 01. Available now through the GLM Coding Plan and ZCode, with open weights following in around two weeks
- 02. Squeezing this much capability out of post-training alone, without retraining the base model, is a genuinely efficient way to keep shipping gains
Z.ai has launched GLM-5.3, a new model positioned as built for coding and ready for cyber defense, using the same 743-billion-parameter base model as GLM-5.2 but with much deeper post-training. Terminal-Bench 3.0 jumps from 4.6 to 28.3, and cybersecurity performance on CyberGym reaches 84.5 percent.
