# GLM-4.5-Air

> 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.

Source page: https://www.aimodel.directory/models/glm-4-5-air
Last verified: 4 Oct 2026

## Specifications

- **Developer:** Zhipu AI (Z.ai)
- **Release date:** 28 Jul 2025 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-4.5-air.toml)
- **Status:** Generally available (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-4.5-air.toml)
- **Weights:** Open weights (source: Hugging Face, https://huggingface.co/zai-org/GLM-4.5-Air)
- **License:** mit (source: Hugging Face, https://huggingface.co/zai-org/GLM-4.5-Air)
- **Parameters:** 110B (source: Hugging Face, https://huggingface.co/zai-org/GLM-4.5-Air)
- **Context window:** 131K (131,072 tokens) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-4.5-air.toml)
- **Max output:** 98K tokens (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-4.5-air.toml)
- **Knowledge cutoff:** Apr 2025 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-4.5-air.toml)
- **Input:** Text (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-4.5-air.toml)
- **Output:** Text (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-4.5-air.toml)
- **Reasoning mode:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-4.5-air.toml)
- **Tool calling:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-4.5-air.toml)
- **Hugging Face:** zai-org/GLM-4.5-Air (source: Hugging Face, https://huggingface.co/zai-org/GLM-4.5-Air)

## API pricing (USD per 1M tokens)

| Provider | Input | Output | Cached input | Context |
|---|---|---|---|---|
| Novita AI | $0.13 | $0.85 | $0.03 | 131K |
| Hugging Face Inference Providers | $0.13 | $0.85 | – | 131K |
| OpenRouter | $0.13 | $0.85 | $0.03 | 131K |
| SiliconFlow | $0.14 | $0.86 | – | 131K |
| Z.ai API | $0.20 | $1.10 | $0.03 | 131K |
| Vercel AI Gateway | $0.20 | $1.10 | $0.03 | 128K |

## FAQ

### 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.

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Data licensed CC BY 4.0. Cite as: AI Model Directory, "GLM-4.5-Air", https://www.aimodel.directory/models/glm-4-5-air