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

# Grok 4.20 Multi-Agent

> xAI's Grok 4.20 Multi-Agent model. See supported inputs, parameters, pricing, response fields, and API examples.

Grok 4.20 Multi-Agent runs a leader agent plus 4 or 16 xAI sub-agents in parallel for research tasks, with a 1M context window and image input. Set `reasoning.effort` to `low` or `medium` for 4 agents, `high` or `xhigh` for 16.

## Model

```
xai/grok-4.20-multi-agent-0309
```

|              |                       |
| ------------ | --------------------- |
| **Provider** | xAI                   |
| **Name**     | Grok 4.20 Multi-Agent |

## Supported Endpoints

xAI serves this model on the Responses API only. `POST /v1/chat/completions` and `POST /v1/messages` return an upstream error for it.

* [Responses](/api-reference/v1-responses) — `POST /v1/responses`

## Example

```bash theme={null}
curl -X POST https://api.unifically.com/v1/responses \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "xai/grok-4.20-multi-agent-0309",
    "reasoning": {"effort": "high"},
    "input": "Compare the three leading approaches to on-device speech recognition and recommend one for a battery-constrained wearable."
  }'
```

<Note>
  **Volume discounts** are available for almost all models. Reach out at [contact@unifically.com](mailto:contact@unifically.com) to discuss custom pricing.
</Note>