GLM 4.5 Air (free) API Cost Calculator
Estimate your monthly API costs for GLM 4.5 Air (free) from Z Ai.
Pricing per 1M tokens
Pricing last verified: Mar 21, 2026
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Cost Breakdown
Compare with Similar Models
| Model | Input/1M | Output/1M |
|---|---|---|
| GLM 4 32B Z Ai | $0.1000 | $0.1000 |
| GLM 4.7 Flash Z Ai | $0.0600 | $0.4000 |
| GLM 4.5 Air Z Ai | $0.1300 | $0.8500 |
| GLM 4.6V Z Ai | $0.3000 | $0.9000 |
| GLM 4.7 Z Ai | $0.3900 | $1.75 |
Frequently Asked Questions
How much does GLM 4.5 Air (free) cost per token?
GLM 4.5 Air (free) is priced at $0.00 per 1M input tokens and $0.00 per 1M output tokens. Use the calculator above to estimate your monthly costs based on your usage volume.
What is the context window for GLM 4.5 Air (free)?
GLM 4.5 Air (free) has a context window of 131.1K tokens (131,072 tokens). The maximum output length is 96K tokens.
Does GLM 4.5 Air (free) support function calling (tool use)?
Yes, GLM 4.5 Air (free) supports function calling (also called tool use). You can define custom functions that the model can invoke as part of its responses.
How does GLM 4.5 Air (free) compare to similar models?
GLM 4.5 Air (free) costs $0.00 input and $0.00 output per 1M tokens. GLM 4.5 Air (free) is competitively priced compared to GLM 4 32B ($0.1000 input / $0.1000 output per 1M tokens). See the "Compare with Similar Models" table above, or visit the GLM 4 32B page at /tools/cost-calculator/z-ai/glm-4-32b.