Z.ai debuts GLM-5.3 with long-horizon coding, cybersecurity upgrades

SiliconANGLE · 2 months ago · 14 ● 3 sources

Z.ai debuted the open-source GLM-5.3 large language model, built on GLM-5.2 and refined with a more extensive post-training process focused on long-horizon coding and cybersecurity research. GLM-5.3 scored highest among open-source models on Terminal Bench 3.0 and performed 50% better than GLM-5.2 on Z.ai’s internal coding-agents benchmark. Z.ai says the updated post-training and sandbox-based workflow produces better coding and vulnerability-finding results, and it plans to release GLM-5.3 weights on Hugging Face within two weeks while the model is available now via its GLM Coding Plan subscription.