# Z.ai GLM 5.5 API

> GLM 5.5 is listed on SandBase as an upcoming model in Z.ai's GLM series and is not yet available on SandBase. As of early October 2026, Z.ai has not officially announced GLM 5.5 or published its capabilities, specifications or release date. Specifications and pricing will be confirmed at launch, once Z.ai publishes official details.

Source: https://www.sandbase.ai/models/z-ai/glm-5.5
API reference: https://www.sandbase.ai/models/z-ai/glm-5.5/docs

## Facts

- Provider: Z.ai
- Type: Language model
- Model ID: `z-ai/glm-5.5`
- Price: Coming soon
- Capabilities: chat, reasoning, structured output, function calling
- Billing: pay per use from one SandBase balance; no provider account or subscription needed

## Call it

- Chat Completions API: `POST https://api.sandbase.ai/v1/chat/completions`

```bash
curl -X POST https://api.sandbase.ai/v1/chat/completions \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "z-ai/glm-5.5",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ],
  "max_tokens": 2048
}'
```

## FAQ

### How do I call Z.ai GLM 5.5 through SandBase?

Create a SandBase API key, then send requests with the model ID "z-ai/glm-5.5" to Chat Completions API (/v1/chat/completions) at https://api.sandbase.ai. The request examples on this page show the exact payload.

### Which features does Z.ai GLM 5.5 support?

Z.ai GLM 5.5 supports reasoning, function calling, structured output. See Specifications above for the full list.

### Do I need a separate Z.ai account?

No. One SandBase API key and balance gives you access to Z.ai GLM 5.5 and the other models in the catalog; you do not need to sign up with Z.ai separately.