# xAI Models

Use xAI Grok language models in Spice with an xAI API key, and grok-4.3 as the default model.

To use a language model hosted on xAI, specify `xai` path in the `from` field and the associated `xai_api_key` parameter. When no model is specified in the `from` field (i.e., `from: xai`), the default model is `grok-4.3`.

| Param | Description | Default |
| - | - | - |
| `xai_api_key` | The xAI API key. | - |
| `xai_usage_tier` | xAI usage tier (0-4). Used for rate limit defaults. | - |

Example:

```yaml
models:
  - from: xai:grok-4.3
    name: xai
    params:
      xai_api_key: ${secrets:SPICE_GROK_API_KEY}
```

Refer to the [xAI models documentation](https://docs.x.ai/docs/models) for more details on available models and configurations.

> **Note**
>
> Although the xAI [documentation](https://docs.x.ai/docs/guides/structured-outputs) shows that xAI models can return structured outputs, this is not true.

## Cookbook

- A cookbook recipe to use xAI's Grok models with Spice. [xAI Models](https://github.com/spiceai/cookbook/tree/trunk/models/xai#readme)