Z.ai: GLM 4.5 Air
Z.ai: GLM 4.5 Air is designed for extensive text-based tasks with a context length of 131,072 tokens and supports both reasoning and tool integration. It accepts text inputs and can generate substantial responses, up to 98,304 output tokens at once. The model is equipped to handle complex queries requiring logical reasoning and external tools. Given its benchmark blended score of 26.3 across one independent test, Z.ai: GLM 4.5 Air performs well in text-focused applications. It should be considered by users prioritizing cost-effectiveness, with a pricing structure of $0.13 per thousand input tokens and $0.85 per thousand output tokens. For those seeking robust text processing capabilities without the need for structured outputs or extensive benchmark coverage, this model stands as a competitive choice in its price range.
Benchmark results
Independent, published benchmarks. Blended score 26.3 across 1 benchmark, last refreshed 2026-07-21. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 27.3 |
- Model ID
- z-ai/glm-4.5-air
- Vendor
- z-ai
- Released
- July 2025
- Tokenizer
- Other
- Input Modalities
- text
- Output Modalities
- text
- Max Output
- 98,304 tokens
- Tool Calling
- ✓ supported
- Structured Output
- not supported
- Reasoning Mode
- ✓ supported
- Vision
- text only
- Audio
- no
- Moderated
- no
What it costs in practice
Computed from the current $0.13/M input and $0.85/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | under $0.01 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.11 |
| A month of a busy support chatbot | 5M in / 2M out | $2.35 |
Similar models
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Z.ai: GLM 5.2
Z.ai: GLM 5.1
Z.ai: GLM 5
Quick answers
- How much does Z.ai: GLM 4.5 Air cost?
- $0.13 per million input tokens and $0.85 per million output tokens.
- What is Z.ai: GLM 4.5 Air's context window?
- 131,072 tokens, roughly 196 pages of text in a single request.
- Does Z.ai: GLM 4.5 Air support tool calling?
- It supports tool calling, a reasoning mode.
- Can Z.ai: GLM 4.5 Air process images?
- No, it is text-only on the input side.