GLM 4.5

GLM 4.5 – Agentic, Reasoning, and Coding Foundation Model

GLM 4.5 is Z.AI's (Zhipu AI) open-source Mixture-of-Experts model built for agentic tasks, reasoning, and coding. Official materials position it as a foundation model for intelligent agents, with a hybrid reasoning design that supports both thinking and direct response modes.

Defining Characteristics

• ARC positioning: The model is explicitly framed around Agentic, Reasoning, and Coding capabilities.
• Hybrid response behavior: It can produce either deeper thinking responses or direct responses depending on the task.
• Agent-focused design: The official blog describes it as optimized for agentic tasks and native function calling.
• Open release strategy: Z.AI released GLM 4.5 alongside a smaller GLM 4.5 Air variant to support broader research and deployment use.