When was GLM-4 released?

GLM-4 was released by Z.ai on Tuesday, Jan 16 2024.

GLM-4 was built by Z.ai. Chinese AI lab spun out of Tsinghua University (formerly Zhipu AI), building the open-weight GLM family. Rebranded internationally as Z.ai in 2025.

Is GLM-4 open source?

No. GLM-4 is a closed model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

What came before and after GLM-4?

Z.ai's previous tracked release was ChatGLM-6B on Mar 14 2023, 308 days earlier. It was followed by GLM-4-9B on Jun 5 2024.

GLM-4

Released Jan 16 2024

GLM-4 is an AI model released by Z.ai on Tuesday, Jan 16 2024, 308 days after ChatGLM-6B.

Compare GLM-4 with

GLM-4

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Frequently asked questions

: GLM-4 was released by Z.ai on Tuesday, Jan 16 2024.
: GLM-4 was built by Z.ai. Chinese AI lab spun out of Tsinghua University (formerly Zhipu AI), building the open-weight GLM family. Rebranded internationally as Z.ai in 2025.
: No. GLM-4 is a closed model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
: Z.ai's previous tracked release was ChatGLM-6B on Mar 14 2023, 308 days earlier. It was followed by GLM-4-9B on Jun 5 2024.