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

# Grok 4.20 Multi-Agent

> Grok 4.20 Multi-Agent: 1M-context xAI model where multiple agents collaborate in parallel on deep research.

Grok 4.20 Multi-Agent is xAI's deep-research model in which multiple agents work in parallel and combine their results.

Call `grok-4.20-multi-agent-0309` through MixRoute using the OpenAI-compatible Responses API.

<Warning>
  This model is not available through Chat Completions. Use `POST /v1/responses`; Chat Completions returns an endpoint error.
</Warning>

## Key capabilities

* Parallel agents - Multiple agents collaborate on the same research task
* 1M context window - Handles large source sets and long investigations
* Reasoning and tools - Supports reasoning, function calling, and structured output
* Multimodal input - Accepts text and images and returns text

## Quick example

<Tabs>
  <Tab title="cURL">
    ```bash theme={null}
    curl "https://api.mixroute.ai/v1/responses" \
      -H "Authorization: Bearer YOUR_API_KEY" \
      -H "Content-Type: application/json" \
      -d '{
        "model": "grok-4.20-multi-agent-0309",
        "input": "Compare the main operational risks of three database migration strategies and produce a sourced recommendation.",
        "max_output_tokens": 512
      }'
    ```
  </Tab>

  <Tab title="Python">
    ```python theme={null}
    from openai import OpenAI

    client = OpenAI(api_key="YOUR_API_KEY", base_url="https://api.mixroute.ai/v1")

    response = client.responses.create(
        model="grok-4.20-multi-agent-0309",
        input="Compare the main operational risks of three database migration strategies and produce a sourced recommendation.",
        max_output_tokens=512,
    )

    print(response.output_text)
    ```
  </Tab>
</Tabs>

## Parameters

| Parameter           | Type            | Required | Description                             |
| ------------------- | --------------- | -------- | --------------------------------------- |
| `model`             | string          | Yes      | Model ID: `grok-4.20-multi-agent-0309`. |
| `input`             | string \| array | Yes      | Text or structured multimodal input.    |
| `max_output_tokens` | integer         | No       | Maximum output tokens.                  |
| `tools`             | array           | No       | OpenAI-compatible tool definitions.     |

<Note>
  MixRoute may also list `grok-4.20-multi-agent-beta-0309`. Use the canonical `grok-4.20-multi-agent-0309` ID shown above for new integrations.
</Note>

## Vendor reference

* [Grok 4.20 Multi-Agent documentation](https://docs.x.ai/developers/models/grok-4.20-multi-agent-0309)