Z.ai: GLM 4.5 Air
The Z.ai: GLM 4.5 Air is an AI model that handles text input and supports reasoning capabilities. It operates within a context length of up to 131072 tokens and can generate a maximum of 98304 completion tokens per request. This model may be worth considering for those who prioritize its specific strengths, particularly its reasoning capabilities. However, its pricing point should also be taken into account: at $0.13 per million input tokens and $0.85 per million output tokens, it is one of the more expensive options available. Its blended benchmark score of 14.8 across one independent benchmark may also factor into a decision to shortlist it, but users with limited budgets or those seeking more comprehensive performance data should carefully evaluate its value proposition.
Benchmark results
Independent, published benchmarks. Blended score 13.6 across 1 benchmark, last refreshed 2026-10-13. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 18.3 |
- 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
Z.ai: GLM 4.5V
Z.ai: GLM 4.5
Z.ai: GLM 5.3 Prime
Z.ai: GLM 5.2
Z.ai: GLM 5 Turbo
Z.ai: GLM 5.3
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.