Open-source releaseModerate global significanceConfirmed confidence
Z.ai releases 355B MoE model GLM-4.5
Z.ai releases GLM-4.5, a 355-billion-parameter MoE model with updated expert routing and improved long-form structure generation.
What happened
Event details
Released on July 28, 2025, GLM-4.5 is a 355-billion-parameter mixture-of-experts Transformer. The update targets routing efficiency and generation over very long structured text, and is distributed as an open model.
Assessment
Why it matters
GLM-4.5 is a major mid-generation update to Z.ai's flagship open model line, combining large-scale MoE architecture with long-form generation improvements.
67/100Global significance score. Regional effects are recorded only when the evidence supports a meaningful difference.
Availability
Access notes
Available as an open model through the GLM-4.5 documentation or repository.