GLM 4.5 Air pricing and routing profile
GLM 4.5 Air from Z.ai lists at $0.13 per million input tokens and $0.85 per million output tokens, with a 131,072-token context window. Prices from OpenRouter's catalogue on 2026-09-28.
Tool callingReasoning control
Cost per 1,000 requests
| Request shape | List cost |
|---|---|
| Classification or routing (600 tokens in, 10 out) | $0.0865 |
| Chat reply (2,000 in, 400 out) | $0.60 |
| Retrieval-augmented answer (8,000 in, 500 out) | $1.47 |
Before prompt caching. Try your own shape in the cost calculator.
Can Gimbix route to it first?
Not as a first-answer model through OpenRouter: no host returns token log probabilities for GLM 4.5 Air. It can still be the model Gimbix falls back to when a cheaper model is unsure.
Cheaper models that can answer first
Models priced below GLM 4.5 Air that expose a confidence signal. Whether they answer your traffic as well is what a Gimbix pilot measures.
| Model | Input / output per 1M | Cheaper on a chat reply |
|---|---|---|
| Qwen3 Coder Next | $0.12 / $0.80 | 7% |
| Qwen3 VL 8B Instruct | $0.117 / $0.455 | 31% |
| Qwen3 VL 32B Instruct | $0.104 / $0.416 | 38% |
| Ternary Bonsai 2 27B | $0.075 / $0.50 | 42% |
| Nemotron 3 Super | $0.08 / $0.45 | 43% |
| Gemma 3 27B | $0.08 / $0.45 | 43% |
Questions
How much does GLM 4.5 Air cost?
GLM 4.5 Air lists at $0.13 per million input tokens and $0.85 per million output tokens on OpenRouter as of 2026-09-28. A typical chat reply of 2,000 input and 400 output tokens costs about $0.60 per 1,000 requests.
What is the context window of GLM 4.5 Air?
131,072 tokens.
Can a cheaper model replace GLM 4.5 Air?
Sometimes. Gimbix proves it on your own traffic before routing: the cheaper model must match GLM 4.5 Air on one half of your requests and make at most three answers worse on the other.