Z.ai: GLM 4.5 Air
The GLM 4.5 Air from z-ai is a model that processes text inputs with a maximum context length of 131072 tokens and supports up to 98304 completion tokens per request. It can handle reasoning tasks and offers tool support for users who require these capabilities. This model may be worth considering by those seeking a balance between price and performance, as its blended benchmark score of 26.3 indicates decent results across independent assessments. However, the relatively high output token price of $0.85/M could offset potential benefits if not carefully managed. Its input token cost of $0.13/M is lower but still noteworthy in comparison to other models.
Benchmark results
Independent, published benchmarks. Blended score 26.3 across 1 benchmark, last refreshed 2026-09-04. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 27.5 |
- 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
Z.ai: GLM 4.5V
Z.ai: GLM 4.5
Z.ai: GLM 5.2 (free)
Z.ai: GLM 5.3
Z.ai: GLM 5 Turbo
Z.ai: GLM 5.2
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.