Input
$0.13
Output
$0.85
Context
128K
GLM 4.5 Air costs $0.13 per million input tokens and $0.85 per million output tokens. Cached input is billed at $0.025 per million, 81% less than fresh input.
Specifications
| Lab | Z.ai |
| Model id | z-ai/glm-4.5-air |
| Input price | $0.13 per million tokens |
| Output price | $0.85 per million tokens |
| Cached input price | $0.025 per million tokens |
| Context window | 131,072 tokens (128K) |
| Maximum output | 98,304 tokens (96K) |
| Tool calling | yes |
| Image input | no |
| Reasoning | no |
| First listed | 25 July 2025 |
Z.ai's other models
| Model | Input / 1M | Output / 1M | Context | Listed |
|---|---|---|---|---|
| GLM 5.3 Prime | $2.80 | $8.80 | 1M | 23 September 2026 |
| GLM 5.3 FlashX | $0.37 | $1.25 | 1M | 18 September 2026 |
| GLM 5.3 Flash | $0.15 | $0.50 | 1M | 26 August 2026 |
| GLM 5.3 | $0.08 | $3.60 | 1M | 18 August 2026 |
| GLM 5V Turbo | $1.20 | $4 | 198K | 1 April 2026 |
| GLM 5 Turbo | $1.20 | $4 | 198K | 15 March 2026 |
Where these numbers come from
Read from OpenRouter's listing of GLM 4.5 Air every 6 hours into the catalog Founden's builders choose their models from. Prices are OpenRouter's listed price per million tokens: for a lab's closed models that is the lab's own list price, and for an open-weight model it is the price of the host OpenRouter routes to by default, which can differ from the lab's own API and from other hosts. US dollars, before batch, volume or regional discounts. Every model.