
Z.ai
Official Playground for High-Performance GLM Models
4.8•22 reviews•534 followers
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 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
Z.ai
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!
Eternal AI
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.
Z.ai
@sig_eternal Thanks Sig! Open Source is all we need. 🙌
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. 🫡