GLM-4.5 Air
zhipu/glm-4.5-airGenuinely free and genuinely useful, the open on-ramp to the GLM family for every developer.
Model overview
Context window
128K
tokens
Input price
—
quoted on request
Output price
—
quoted on request
Weekly volume
—
tokens / week
Open weights
Yes
self-hostable
Capabilities
3
of 11 tags
Description
GLM-4.5 Air is a language model from Zhipu AI. Webparam does not stock this model yet and can source it on request — tell us what you need it for and we will come back with availability and a price. Zhipu AI’s stated focus is open agentic GLM family. Its mean it can also be self-hosted under its licence.
Capabilities
- Tool calling
- Calls functions you define and returns their arguments as structured data, the basis of agents.
- Streaming
- Emits tokens as they are generated, so answers appear progressively rather than all at once.
- Open weights
- The parameters are published, so the model can be inspected, fine-tuned and self-hosted under its licence.
Strengths & weaknesses
Strengths
- Free at point of use
- Real tool-calling support
- Open weights
Weaknesses
- Rate limits apply on free tier
- Quality ceiling below paid siblings
Pricing
Free| Rate | Price | Unit |
|---|---|---|
| Input | $0.00 | per 1M tokens |
| Output | — not charged | — |
Free at the point of use; fair-use rate limits apply to the free tier. Illustrative placeholder pricing.
Context window
128Ktokens
covers prompt and response together, so a long input leaves less room for the answer.
Supported features
| Feature | Support |
|---|---|
| Tool calling | Supported |
| JSON mode | Not supported |
| Streaming | Supported |
| Vision input | Not supported |
| Audio input | Not supported |
| Long context | Not supported |
| Open weights | Supported |
| Reasoning | Not supported |
| Fine-tunable | Not supported |
| Batch | Not supported |
| Caching | Not supported |
Example use cases
Prototyping
Free at point of use
Learning
Real tool-calling support
Low-stakes automation
Open weights
Comparison
| Attribute | GLM-4.5 Air | Nemotron Super | GLM-4.6 |
|---|---|---|---|
| Context window | 128K | 128K | 200K |
| Input price | $0.00 | $0.00 | $0.00 |
| Output price | — not charged | — not charged | — not charged |
| Tool calling | Supported | Supported | Supported |
| JSON mode | Not supported | Not supported | Supported |
| Vision input | Not supported | Not supported | Not supported |
| Open weights | Supported | Supported | Supported |
| Prompt caching | Not supported | Not supported | Supported |
Best value in each row is highlighted. Illustrative placeholder data.
Provider information
View Zhipu AI →Zhipu AI · 智谱AI · Beijing, China · est. 2019
Born from Tsinghua University research, Zhipu's GLM family became the open ecosystem's agentic specialist: models tuned for tool use and multi-step work, released under permissive licences. Its free Air tier made capable open models accessible to every developer.
Recent releases
Documentation
Frequently asked questions
Input is billed at $0.00 per 1M tokens, and there is no separate output charge. Every figure on this page is an illustrative placeholder.