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

# xAI models

xAI (Grok) is a family of advanced large language models developed by [xAI](https://x.ai/), designed for high performance and efficiency.

## Using the API

Use the [Chat completion](/en/chat/chat) API to call xAI models. See the [pricing page](/en/models-and-pricing#xai-models) for details.

## xAI (Grok) models comparison

| Feature           | Grok 3 Beta                       | Grok Beta                         |
| ----------------- | --------------------------------- | --------------------------------- |
| Description       | Latest beta model                 | Stable model                      |
| Best for          | Complex reasoning, creative tasks | General reasoning, analysis       |
| Vision capability | No                                | No                                |
| Tool calls        | No                                | No                                |
| Context window    | 128K tokens                       | 128K tokens                       |
| Max output        | 15K tokens                        | 15K tokens                        |
| Knowledge cutoff  | Not disclosed                     | Not disclosed                     |
| API model key     | `x-ai/grok-3-beta`                | `x-ai/grok-beta`<br />`Grok-beta` |

## Notes

* Grok 3 Beta is the latest beta version, suitable for scenarios requiring the newest capabilities.
* Grok Beta is the stable version, recommended for production use.
* For more details, visit [xAI Grok](https://x.ai/)。