GLM-4.5-Air
Summary
GLM-4.5-Air is an open-weight language model from Zhipu AI (Z.ai), released on 28 Jul 2025. It accepts text and generates text, with a 131K-token context window and up to 98K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $0.13 per million input tokens and $0.85 per million output tokens (Novita AI), across 6 providers we track.
Lighter GLM-4.5 variant for fast coding assistance and cheaper agents
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Zhipu AI (Z.ai) |
|---|---|
| Release date | 28 Jul 2025 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Open weights [Hugging Face] |
| License | mit [Hugging Face] |
| Parameters | 110B [Hugging Face] |
| Context window | 131K (131,072 tokens) [models.dev] |
| Max output | 98K tokens [models.dev] |
| Knowledge cutoff | Apr 2025 [models.dev] |
| Input | Text [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | Yes [models.dev] |
| Tool calling | Yes [models.dev] |
| Hugging Face | zai-org/GLM-4.5-Air [Hugging Face] |
GLM-4.5-Air API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| Novita AI zai-org/glm-4.5-air | $0.13 | $0.85 | $0.03 | 131K | models.dev, 4 Oct 2026 |
| Hugging Face Inference Providers zai-org/GLM-4.5-Air | $0.13 | $0.85 | – | 131K | models.dev, 4 Oct 2026 |
| OpenRouter z-ai/glm-4.5-air | $0.13 | $0.85 | $0.03 | 131K | OpenRouter, 4 Oct 2026 |
| SiliconFlow zai-org/GLM-4.5-Air | $0.14 | $0.86 | – | 131K | models.dev, 4 Oct 2026 |
| Z.ai API glm-4.5-air | $0.20 | $1.10 | $0.03 | 131K | models.dev, 4 Oct 2026 |
| Vercel AI Gateway zai/glm-4.5-air | $0.20 | $1.10 | $0.03 | 128K | models.dev, 4 Oct 2026 |
Frequently asked questions
What is the context window of GLM-4.5-Air?
GLM-4.5-Air has a context window of 131,072 tokens (131K) and can generate up to 98,304 tokens in a single response, according to models.dev.
How much does the GLM-4.5-Air API cost?
Through Z.ai API, GLM-4.5-Air costs $0.20 per million input tokens and $1.10 per million output tokens. The lowest listed price is $0.13 input / $0.85 output through Novita AI. Prices last verified 4 Oct 2026.
Is GLM-4.5-Air open source?
GLM-4.5-Air is an open-weight model: its weights are published on Hugging Face as zai-org/GLM-4.5-Air under the mit license. Check the license terms before commercial use.
When was GLM-4.5-Air released?
Zhipu AI (Z.ai) released GLM-4.5-Air on 28 Jul 2025, according to models.dev.
Which providers offer GLM-4.5-Air?
We track GLM-4.5-Air on 6 providers: Novita AI, Hugging Face Inference Providers, OpenRouter, SiliconFlow, Z.ai API, Vercel AI Gateway.
Change history
No changes detected since we started tracking this model. We re-check every source daily.
Sources
- https://openrouter.ai/z-ai/glm-4.5-air
- https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-4.5-air.toml
- https://huggingface.co/zai-org/GLM-4.5-Air
- https://github.com/sst/models.dev/blob/dev/providers/novita-ai/models/zai-org/glm-4.5-air.toml
- https://github.com/sst/models.dev/blob/dev/providers/huggingface/models/zai-org/GLM-4.5-Air.toml
- https://github.com/sst/models.dev/blob/dev/providers/siliconflow/models/zai-org/GLM-4.5-Air.toml
- https://github.com/sst/models.dev/blob/dev/providers/vercel/models/zai/glm-4.5-air.toml