Z.ai

Z.ai

Official Playground for High-Performance GLM Models

4.8
22 reviews

534 followers

Official Z.ai platform to experience our new, MIT-licensed GLM models (Base, Reasoning, Rumination). Simple UI focuses on model interaction. Free.
This is the 2nd launch from Z.ai. View more
GLM-4.5

GLM-4.5

Unifying agentic capabilities in one open model
GLM-4.5 was ranked #5 of the day for July 31st, 2025
GLM-4.5 is a new 355B parameter open-weight MoE model (32B active). It delivers state-of-the-art performance on reasoning, code, and agentic tasks. Both the 355B flagship and a 106B Air version are now available, featuring dual-mode inference.
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Launch Team

What do you think? …

Zixuan Li
Maker
📌

Today, we introduce two new GLM family members: GLM-4.5 and GLM-4.5-Air — our latest flagship models.

GLM-4.5 is built with 355 billion total parameters and 32 billion active parameters, and GLM-4.5-Air with 106 billion total parameters and 12 billion active parameters. Both are designed to unify reasoning, coding, and agentic capabilities into a single model in order to satisfy more and more complicated requirements of fast rising agentic applications.

We're proud to contribute GLM-4.5 to the open-source community and can't wait to see what developers build with it. Looking forward to your feedback!

Sig Eternal

Congrats on the launch! GLM-4.5 could be a major step forward in unifying reasoning, coding, and agentic capabilities. Open-source models are the future.

Oliver Zenn

@sig_eternal Thanks Sig! Open Source is all we need. 🙌

Zac Zuo
Hunter

For the past few years, the GLM model series from the Zhipu team (now Z.ai) has been one of the favorites in the open-source community, often as a great, affordable option. With GLM-4.5, however, it's clear they're now aiming for the top.

So, long story short: imagine a model with the agentic coding capabilities like Claude 4, but 2-3x faster, 10x cheaper (based on official API prices), and it's completely open-source.

This. is. simply wild. 🫡