GLM-5.3 didn’t change the base model — where did its coding gains come from?
The New Stack 2 months ago 51 ● 3 sources
Z.ai released GLM-5.3, a coding and agent model built on the same base model as GLM-5.2, with gains attributed mainly to expanded post-training. It reported a jump from 4.6 to 28.3 on Terminal-Bench 3.0. The model is now usable via Z.ai’s Coding Plan and will deliver weights after a two-week hardening and safety period, changing how developers can validate performance locally and run A/B tests.