# GLM-5.3

> GLM-5.3 is an open-weight language model from Zhipu AI (Z.ai), released on 14 Aug 2026. It accepts text and generates text, with a 1M-token context window and up to 131K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $0.90 per million input tokens and $4 per million output tokens (DeepInfra), across 14 providers we track.

Source page: https://www.aimodel.directory/models/glm-5-3
Last verified: 4 Oct 2026

## Specifications

- **Developer:** Zhipu AI (Z.ai)
- **Release date:** 14 Aug 2026 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-5.3.toml)
- **Status:** Generally available (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-5.3.toml)
- **Weights:** Open weights (source: Hugging Face, https://huggingface.co/zai-org/GLM-5.3)
- **License:** glm-5.3 (source: Hugging Face, https://huggingface.co/zai-org/GLM-5.3)
- **Parameters:** 753B (source: Hugging Face, https://huggingface.co/zai-org/GLM-5.3)
- **Context window:** 1M (1,000,000 tokens) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-5.3.toml)
- **Max output:** 131K tokens (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-5.3.toml)
- **Input:** Text (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-5.3.toml)
- **Output:** Text (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-5.3.toml)
- **Reasoning mode:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-5.3.toml)
- **Tool calling:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-5.3.toml)
- **Structured output:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-5.3.toml)
- **Hugging Face:** zai-org/GLM-5.3 (source: Hugging Face, https://huggingface.co/zai-org/GLM-5.3)

## API pricing (USD per 1M tokens)

| Provider | Input | Output | Cached input | Context |
|---|---|---|---|---|
| NVIDIA NIM | Free | Free | – | 1M |
| DeepInfra | $0.90 | $4 | $0.20 | 1M |
| FriendliAI | $1.26 | $3.96 | $0.23 | 1M |
| Z.ai API | $1.40 | $4.40 | $0.26 | 1M |
| Mistral API | $1.40 | $4.40 | $0.14 | 1M |
| Cloudflare Workers AI | $1.40 | $4.40 | $0.26 | 1M |
| Fireworks AI | $1.40 | $4.40 | $0.26 | 1M |
| Hugging Face Inference Providers | $1.40 | $4.40 | – | 1M |
| Baseten | $1.40 | $4.40 | $0.14 | 1M |
| SiliconFlow | $1.40 | $4.40 | $0.26 | 1M |
| Fireworks AI | $1.40 | $4.40 | $0.26 | 1M |
| Nebius AI Studio | $1.40 | $4.40 | $1.40 | 1M |
| Together AI | $1.40 | $4.40 | $0.26 | 1M |
| OpenRouter | $1.40 | $4.40 | $0.14 | 1M |
| Vercel AI Gateway | $1.40 | $4.40 | $0.14 | 1M |
| Fireworks AI | $2.10 | $6.60 | $0.39 | 1M |
| Fireworks AI | $2.10 | $6.60 | $0.39 | 1M |
| Baseten | $2.10 | $6.60 | – | 1M |
| Vercel AI Gateway | $2.10 | $6.60 | $0.21 | 1M |

## FAQ

### What is the context window of GLM-5.3?

GLM-5.3 has a context window of 1,000,000 tokens (1M) and can generate up to 131,072 tokens in a single response, according to models.dev.

### How much does the GLM-5.3 API cost?

Through Z.ai API, GLM-5.3 costs $1.40 per million input tokens and $4.40 per million output tokens. The lowest listed price is $0.90 input / $4 output through DeepInfra. Prices last verified 4 Oct 2026.

### Is GLM-5.3 open source?

GLM-5.3 is an open-weight model: its weights are published on Hugging Face as zai-org/GLM-5.3 under the glm-5.3 license. Check the license terms before commercial use.

### When was GLM-5.3 released?

Zhipu AI (Z.ai) released GLM-5.3 on 14 Aug 2026, according to models.dev.

### Which providers offer GLM-5.3?

We track GLM-5.3 on 14 providers: NVIDIA NIM, DeepInfra, FriendliAI, Z.ai API, Mistral API, Cloudflare Workers AI, Fireworks AI, Hugging Face Inference Providers, Baseten, SiliconFlow, Nebius AI Studio, Together AI, OpenRouter, Vercel AI Gateway.

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Data licensed CC BY 4.0. Cite as: AI Model Directory, "GLM-5.3", https://www.aimodel.directory/models/glm-5-3