> ## Documentation Index
> Fetch the complete documentation index at: https://docs.venice.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# GLM 5.3 API

> GLM 5.3 API on Venice: 1M context, $1.75 input and $5.50 output per 1M tokens. Private and end-to-end encrypted variants. Pricing, specs and code examples.

> [accordion] Plain-text specification
>
> ## GLM 5.3 API
>
> GLM 5.3 is a large language model by Z.ai, available on the Venice API as `z-ai-glm-5-3`. Private and end-to-end encrypted variants are available.
>
> GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves on GLM-5.2 in coding and in the balance between performance and token efficiency.
>
> ### GLM 5.3 API pricing
>
> | Model ID | Variant | Privacy | Price |
> | - | - | - | - |
> | `z-ai-glm-5-3` | Standard | Private | $1.75 / $5.50 per 1M |
> | `e2ee-glm-5-3-p` | E2EE | E2EE | $1.75 / $5.50 per 1M |
>
> ### GLM 5.3 specifications
>
> | Spec | Value |
> | - | - |
> | Provider | Z.ai |
> | Released | Aug 18, 2026 |
> | Privacy | Private, E2EE |
> | Status | Stable |
> | Open weights | Yes |
> | Context window | 1M tokens |
> | Max output | 128K tokens |
> | Reasoning effort | Not adjustable |
>
> ### How to use the GLM 5.3 API
>
> Send requests to `POST https://api.venice.ai/api/v1/chat/completions` with `"model": "z-ai-glm-5-3"` and your API key.
>
> ```bash theme={"system"}
> curl https://api.venice.ai/api/v1/chat/completions \
>   -H "Authorization: Bearer $VENICE_API_KEY" \
>   -H "Content-Type: application/json" \
>   -d '{
>     "model": "z-ai-glm-5-3",
>     "messages": [{ "role": "user", "content": "Explain TEE attestation in two sentences." }]
>   }'
> ```
>
> ### Related models
>
> * [GLM 5.2 API](https://docs.venice.ai/models/glm-5-2.md): $1.40 / $4.40 per 1M
> * [GLM 5.1 API](https://docs.venice.ai/models/glm-5-1.md): $1.54 / $4.84 per 1M
> * [GLM 5 API](https://docs.venice.ai/models/glm-5.md): $1.00 / $3.20 per 1M
> * [GLM 4.7 API](https://docs.venice.ai/models/glm-4-7.md): $0.55 / $2.65 per 1M
> * [GLM 4.6 API](https://docs.venice.ai/models/glm-4-6.md): $0.43 / $1.75 per 1M
> * [DeepSeek V4 Pro 0813 API](https://docs.venice.ai/models/deepseek-v4-pro-0813.md): $1.65 / $4.95 per 1M
> * [Muse Spark Open API](https://docs.venice.ai/models/muse-spark-open.md): $1.56 / $5.31 per 1M
> * [Grok 4.6 API](https://docs.venice.ai/models/grok-4-6.md): $2.27 / $6.80 per 1M
> * [Grok 4.7 API](https://docs.venice.ai/models/grok-4-7.md): $2.27 / $6.80 per 1M


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