# Z.AI: GLM 4.5 Air: AI model fact sheet

- **Provider:** zhipu
- **Released:** 2025-07-25
- **Context window:** 128,000 tokens
- **API pricing:** $0.20 / 1M input, $1.10 / 1M output
- **OpenRouter ID:** z-ai/glm-4.5-air
- **Capabilities:** conversation, reasoning, analysis

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.

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/glm-4.5-air