> ## 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.

# GPT-5.4 Nano

> GPT-5.4 Nano: low-cost reasoning model for simple, high-volume tasks.

GPT-5.4 Nano is OpenAI's cheapest GPT-5.4-class model for classification, extraction, ranking, and high-volume subagent tasks.

Call `gpt-5.4-nano` through MixRoute using the endpoint below.

## Key capabilities

* 400K context window - Supports substantial input context
* 128K maximum output - Handles long structured results
* Reasoning control - Supports none, low, medium, high, and xhigh
* Responses and Chat Completions - Available through both interfaces

## 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": "gpt-5.4-nano",
      "input": "Classify this request and return a short JSON result.",
      "reasoning": {"effort": "low"},
      "max_output_tokens": 256
    }'
    ```
  </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="gpt-5.4-nano",
        input="Classify this request and return a short JSON result.",
        reasoning={"effort": "low"},
        max_output_tokens=256,
    )

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

## Parameters

| Parameter           | Type            | Required | Description                                |
| ------------------- | --------------- | -------- | ------------------------------------------ |
| `model`             | string          | Yes      | Model ID. Must be `gpt-5.4-nano`.          |
| `input`             | string \| array | Yes      | Text or structured response input.         |
| `max_output_tokens` | integer         | No       | Maximum output tokens.                     |
| `reasoning`         | object          | No       | Reasoning configuration, including effort. |
| `stream`            | boolean         | No       | Enable SSE streaming.                      |
| `tools`             | array           | No       | Tools available to the model.              |

## Vendor reference

* [OpenAI GPT-5.4 Nano model page](https://developers.openai.com/api/docs/models/gpt-5.4-nano)