Z.ai Releases GLM-4.5 and GLM-4.5-Air Open-Source Agentic AI Models

Chinese artificial intelligence (AI) lab Z.ai announced the release of two new open-source GLM models on Monday. Dubbed GLM-4.5 and GLM-4.5-Air, the AI firm calls them its latest flagship models. Both of them are hybrid reasoning models that offer a thinking mode for complex reasoning and tool use, and a non-thinking mode for instant responses. Additionally, the company says these models support agentic capabilities.