Z.AI: GLM 4.5 Air
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](https://openrouter.ai/docs/use-cases/reasoning-tokens#enable-reasoning-with-default-config)
Parameters
-
Context Window
131,072
tokens
Input Price
$0.2
per 1M tokens
Output Price
$1.1
per 1M tokens
Capabilities
Model capabilities and supported modalities
Performance
Excellent reasoning capabilities with strong logical analysis
-
-
-
Modalities
text
text
LLM Price Calculator
Calculate the cost of using this model
Monthly Cost Estimator
Based on different usage levels