GLM-4.5 at a glance
GLM-4.5 (355B total, 32B active) and GLM-4.5-Air (106B total, 12B active) offer thinking and instant modes, 128K context and native function calling, with open weights.
What changed with GLM-4.5
On July 28, 2025, Z.ai introduced GLM-4.5 and GLM-4.5-Air. GLM-4.5 has 355 billion total and 32 billion active parameters; Air has 106 billion total and 12 billion active. Both are hybrid reasoning models with a thinking mode for complex reasoning and tool use and a non-thinking mode for instant replies.
Z.ai said GLM-4.5 ranked third overall across 12 agentic, reasoning and coding benchmarks against models from OpenAI, Anthropic, Google, xAI and others, with a 128K context window and native function calling. In its own tests inside Claude Code, GLM-4.5 reported a 90.6% tool-calling success rate. The models are on the Z.ai API with open weights on Hugging Face and ModelScope; the Hugging Face repository lists an MIT license.
GLM-4.5 in numbers
Values are copied from the linked source on the date shown. They are not IA Compa measurements.
- Context windowas of · Source for Context window: z.ai (opens in a new tab)
- 128K tokens
How it compares
Other models in the same category that we have covered, using each model's latest recorded value. (Models)
Where to compare GLM-4.5
Independent leaderboards and official resources for comparing this model yourself. Rankings change often; each site shows its own current data.
General leaderboards
Why GLM-4.5 matters for businesses
For businesses, GLM-4.5 and especially the smaller Air model added capable, permissively licensed options for agent workflows that can run on more modest hardware than trillion-parameter models.
Sources for this story
- Official
- zai-org/GLM-4.5 (opens in a new tab)Official
Hugging Face · huggingface.co
- GLM-4.5 model page (opens in a new tab)Benchmark
Artificial Analysis · artificialanalysis.ai
Last verified: . IA Compa summarizes public announcements for business readers. We are not affiliated with the companies mentioned. Always confirm details, pricing, and availability with the official source.
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