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

# GPT-Image-2 画像生成

> Generate images with gpt-image-2, supporting text-to-image and reference_images based image generation

* Unified image generation API
* Select the `gpt-image-2` model via the `model` parameter
* Supports text-to-image, single-reference, and multi-reference image generation
* Async task management with task ID based result lookup

<Warning>
  **Important Change**: For better performance and cost control, base64 image data is no longer supported in `image_urls` or `reference_images`. Please use the [Upload 画像API](../../uploads/images) first to upload images and obtain a URL.
</Warning>

## Authorizations

<ParamField header="Authorization" type="string" required>
  All endpoints require Bearer Token authentication

  Get your API Key from the [API Key Management Page](https://toapis.com/console/token)

  Add to request header:

  ```
  Authorization: Bearer YOUR_API_KEY
  ```
</ParamField>

## Body

<ParamField body="model" type="string" default="gpt-image-2" required>
  Image generation model name

  Example: `"gpt-image-2"`
</ParamField>

<ParamField body="prompt" type="string" required>
  Text prompt for image generation

  Maximum 32,000 characters for GPT image models
</ParamField>

<ParamField body="size" type="string" default="1:1">
  Output image aspect ratio

  Currently supported ratios:

  `1:1`, `3:2`, `2:3`, `4:3`, `3:4`, `5:4`, `4:5`, `16:9`, `9:16`, `2:1`, `1:2`, `21:9`, `9:21`
</ParamField>

<ParamField body="resolution" type="string" default="1k">
  Output resolution tier

  Supported values: `1k`, `2k`, `4k`
</ParamField>

### Size Reference

| size   | 1k          | 2k          | 4k          |
| ------ | ----------- | ----------- | ----------- |
| `1:1`  | `1024x1024` | `2048x2048` | `2880x2880` |
| `3:2`  | `1536x1024` | `2048x1360` | `3520x2336` |
| `2:3`  | `1024x1536` | `1360x2048` | `2336x3520` |
| `4:3`  | `1024x768`  | `2048x1536` | `3312x2480` |
| `3:4`  | `768x1024`  | `1536x2048` | `2480x3312` |
| `5:4`  | `1280x1024` | `2560x2048` | `3216x2576` |
| `4:5`  | `1024x1280` | `2048x2560` | `2576x3216` |
| `16:9` | `1536x864`  | `2048x1152` | `3840x2160` |
| `9:16` | `864x1536`  | `1152x2048` | `2160x3840` |
| `2:1`  | `2048x1024` | `2688x1344` | `3840x1920` |
| `1:2`  | `1024x2048` | `1344x2688` | `1920x3840` |
| `21:9` | `2016x864`  | `2688x1152` | `3840x1648` |
| `9:21` | `864x2016`  | `1152x2688` | `1648x3840` |

<ParamField body="n" type="integer" default={1}>
  Number of images to generate

  Default: 1
</ParamField>

<ParamField body="response_format" type="string" default="url">
  レスポンス format

  The API returns image URLs, so `url` is the recommended value
</ParamField>

<ParamField body="reference_images" type="string[]">
  Reference image URLs for image-to-image generation

  **⚠️ URL format only (base64 no longer supported)**

  * Publicly accessible URLs (`http://` or `https://`)
  * You can use the [Upload 画像API](../../uploads/images) to upload local files and get URLs
  * Supports single-image and multi-image reference
</ParamField>

<ParamField body="image_urls" type="string[]">
  Backward-compatible reference image field

  ToAPIs automatically normalizes it to `reference_images`
</ParamField>

## レスポンス

<ResponseField name="id" type="string">
  Unique task identifier for status queries
</ResponseField>

<ResponseField name="object" type="string">
  Object type, always `generation.task`
</ResponseField>

<ResponseField name="model" type="string">
  モデル name used
</ResponseField>

<ResponseField name="status" type="string">
  Task status

  * `queued`
  * `in_progress`
  * `completed`
  * `failed`
</ResponseField>

<ResponseField name="progress" type="integer">
  Task progress percentage (0-100)
</ResponseField>

<ResponseField name="created_at" type="integer">
  Task creation timestamp (Unix timestamp)
</ResponseField>

<RequestExample>
  ```bash cURL theme={null}
  curl --request POST \
    --url https://toapis.com/v1/images/generations \
    --header 'Authorization: Bearer <token>' \
    --header 'Content-Type: application/json' \
    --data '{
      "model": "gpt-image-2",
      "prompt": "Generate a futuristic city night poster with neon lighting and cinematic composition",
      "n": 1,
      "size": "1:1",
      "resolution": "1k",
      "response_format": "url"
    }'
  ```

  ```bash cURL (Image-to-Image) theme={null}
  curl --request POST \
    --url https://toapis.com/v1/images/generations \
    --header 'Authorization: Bearer <token>' \
    --header 'Content-Type: application/json' \
    --data '{
      "model": "gpt-image-2",
      "prompt": "保留主体结构，把画面改成赛博朋克风格，增强光影和细节",
      "n": 1,
      "size": "1:1",
      "resolution": "1k",
      "image_urls": [
        "https://example.com/source.png",
         "https://example.com/source.png",
        "https://example.com/source.png"
      ],
      "response_format": "url"
    }'
  ```

  ```javascript JavaScript theme={null}
  const response = await fetch('https://toapis.com/v1/images/generations', {
    method: 'POST',
    headers: {
      'Authorization': 'Bearer your-ToAPIs-key',
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      model: 'gpt-image-2',
      prompt: 'Generate a futuristic city night poster with neon lighting and cinematic composition',
      n: 1,
      size: '1:1',
      resolution: '1k',
      response_format: 'url'
    })
  });

  const task = await response.json();
  console.log(task.id, task.status);
  ```
</RequestExample>

<ResponseExample>
  ```json 200 theme={null}
  {
    "id": "task_img_abc123def456",
    "object": "generation.task",
    "model": "gpt-image-2",
    "status": "queued",
    "progress": 0,
    "created_at": 1703884800,
    "metadata": {}
  }
  ```
</ResponseExample>