Z.ai released GLM-5.3, a model post-trained on GLM-5.2 to get better coding and cybersecurity capabilities.

In a blog post, Z.ai revealed that GLM-5.3 outperformed GLM-5.2 on multiple benchmarks. The company said every advance in GLM-5.3 was due to post training.

"For GLM-5.3, we pushed environment scaling toward tasks that look less like coding exercises and more like real units of expert work. The environments now cover a much broader range of production workflows, with tasks designed around how engineering and research work is actually carried out in practice."