Z.ai: GLM 4.5 Air (free)
🇨🇳 Z.ai (Zhipu) · GLM 4.5
Overview
Z.ai: GLM 4.5 Air (free) is a large language model API from Z.ai (Zhipu), part of its GLM 4.5 model family. It is currently routed free of charge on OpenRouter, which makes it well suited to prototyping and high-volume experimentation where per-token cost would otherwise dominate. The 131K-token context window — around 197 pages of text — comfortably handles long documents, multi-file code, or extended conversations. All prices on this page reflect OpenRouter's routed rates and are re-synced automatically every day; confirm against the provider's official pricing before committing to production.
| Dimension | Unit | Price (USD) |
|---|---|---|
| Input | per 1M tokens | Free |
| Output | per 1M tokens | Free |
- Provider
- Z.ai（智譜） (Z.ai (Zhipu))
- Model Family
- GLM 4.5
- Version String
- z-ai/glm-4.5-air:free
- Status
- Active
- Modality
- Text
- Context Window
- 131,072 tokens
- Output Limit
- 96,000 tokens
90-Day Price Trend
Input / Output price (USD per 1M tokens)
Past 90 days of records; every price change is shown here
| Date | Dimension | Price (USD) | Source |
|---|---|---|---|
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter | |
| Output | Free | OpenRouter | |
| Input | Free | OpenRouter |
Key Insights
Key data points from this page for quick reference and citation.
- Z.ai: GLM 4.5 Air (free) Input price: $0/M tokens
- Z.ai: GLM 4.5 Air (free) Output price: $0/M tokens
- Context window: 131,072 tokens
- Provider: Z.ai (Zhipu)
- Model family: GLM 4.5
- Modalities: Text
- Data source: OpenRouter, updated daily