Z.ai's GLM-5.2 model was the tool Hugging Face turned to in the wake of OpenAI's attack on its infrastructure when it was unable to use Anthropic's newest Claude models, thanks to government-imposed restrictions on cybersecurity AI. On Friday Z.ai released GLM-5.3, which it described as basically a souped-up version of 5.2.
"Scaling post-training is all we did for GLM-5.3," the company said in a blog post, explaining that the heavy lifting that catapulted GLM-5.2 into the enterprise spotlight allowed the company to simply (well, it's not simple) fine tune the base model with additional data to create the new one. "Compared with GLM-5.2, it is much better at complex coding and long-horizon tasks," the company said.
