
The GLM-4.5 series, developed by Zhipu AI (Z.ai), represents a significant advancement in open-source large language models (LLMs). Designed to unify

China’s Z.ai (formerly Zhipu AI) has once again seized headlines with the launch of its open‑source GLM 4.5 Series. Positioned as a cost‑efficient,

Zhipu’s GLM‑4.5 Air API is a RESTful endpoint on the Z.ai (global) and Zhipu AI Open (Mainland China) platforms that provides access to the compact 106 billion‑parameter (12 billion active) GLM‑4.5 Air model—featuring hybrid “thinking” and “non‑thinking” modes and full configurability of inference settings (e.g., temperature, max tokens, streaming) for efficient, high‑throughput intelligent‑agent applications .

On July 28, 2025, Beijing‑based startup Zhipu AI officially unveiled its GLM-4.5 series of open‑source large language models, marking its most powerful

Zhipu’s GLM‑4.5 API is a unified RESTful service on the Z.ai (global) and Zhipu AI Open (Mainland China) platforms that exposes the 355 billion‑parameter, hybrid‑expert GLM‑4.5 model—capable of complex reasoning, coding, and agentic tasks—with configurable options (e.g., temperature, max tokens, streaming).