Z.ai: GLM 4.5 Air (free)
Z.ai GLM 4.5 Air (free) supports tool use and function calling with a 131K context window at no cost, but carries no benchmark data of its own. Without measurable performance evidence, it scores conservatively regardless of its free pricing.
Assessment date: March 14, 2026
Our methodology takes into account a range of factors including pricing, functionality, capabilities, benchmark performance, and real-world applicability. Rankings are reviewed and updated regularly as new models are released. Issues with our rankings? Contact us
GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications. Like GLM-4.5, it adopts the Mixture-of-Experts (MoE) architecture but with a more compact parameter size. GLM-4.5-Air also supports hybrid inference modes, offering a "thinking mode" for advanced reasoning and tool use, and a "non-thinking mode" for real-time interaction. Users can control the reasoning behaviour with the reasoning enabled boolean. Learn more in our docs
Capabilities
Architecture
| Modality | Text → Text |
| Tokenizer | Other |
Model Information
Live Performance
Live endpoint metrics — refreshed every 30 minutes.
