> For the complete documentation index, see [llms.txt](https://bountyv.gitbook.io/vdocs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bountyv.gitbook.io/vdocs/frontier-passthrough/frontier-chatgpt-image.md).

# ChatGPT Image

OpenAI's `gpt-image-2` on OpenAI's own parameters. Synchronous.

```
POST /api/v1/frontier/chatgpt-image
```

Send no references and the call routes to OpenAI's `images/generations`; send one or more and it routes to `images/edits`, which composes them into a single output. Same model and price as `engine=gptimage` on [Text-to-Image](/vdocs/image-api/images-txt2img.md).

## Authentication

```
Authorization: Bearer sk_live_...
```

## Request

**Content-Type:** `application/json`

| Field    | Type      | Required | Default       | Description                                                                         |
| -------- | --------- | -------- | ------------- | ----------------------------------------------------------------------------------- |
| `prompt` | string    | ✅        | —             | What to generate, or the edit instruction when references are supplied              |
| `images` | string\[] | —        | —             | Up to 16 references, in prompt order. `data:` URL, public https URL, or bare base64 |
| `image`  | string    | —        | —             | Single reference, same formats                                                      |
| `size`   | string    | —        | `"1024x1024"` | `"1024x1024"` \| `"1536x1024"` \| `"1024x1536"` \| `"auto"`                         |

`gpt-image-2` has no free-form width/height — those four buckets are the entire set it accepts. `"auto"` lets the model choose.

## Response

```json
{
  "image": "https://.../generations/<id>.png?token=...",
  "generation_id": "gJ8nP3kQ2m",
  "model": "gpt-image-2",
  "mode": "edit",
  "reference_images": 3,
  "max_reference_images": 16,
  "size": "1536x1024",
  "charged_cents": 39,
  "balance_cents": 4761,
  "elapsed_ms": 11402
}
```

| Field           | Type           | Description                                                                          |
| --------------- | -------------- | ------------------------------------------------------------------------------------ |
| `mode`          | string         | `"generation"` (no references) or `"edit"` (one or more) — which OpenAI endpoint ran |
| `image`         | string         | Signed URL when the generation persists, otherwise an inline `data:` URL             |
| `generation_id` | string \| null | Generation record ID                                                                 |
| `charged_cents` | integer        | Amount deducted                                                                      |

## Example

Compose three references into one scene:

```bash
curl -X POST https://substance-api.com/api/v1/frontier/chatgpt-image \
  -H "Authorization: Bearer sk_live_..." \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "Put the product from image 1 on the desk in image 2, lit like image 3",
    "images": [
      "https://example.com/product.png",
      "https://example.com/desk.jpg",
      "https://example.com/lighting-ref.jpg"
    ],
    "size": "1536x1024"
  }'
```

## Errors

| Status | Meaning                                                                                                                              |
| ------ | ------------------------------------------------------------------------------------------------------------------------------------ |
| `400`  | Missing `prompt`, unsupported `size` (the four supported values are returned), an unreadable image value, or more than 16 references |
| `402`  | Balance below the call price                                                                                                         |
| `403`  | Your account doesn't have the `image` product enabled                                                                                |
| `502`  | OpenAI failed or refused the prompt. Moderation blocks surface here — the charge is refunded                                         |
| `503`  | The pipeline is disabled                                                                                                             |

## Pricing

$0.39 per image. Bills on `images.txt2img.gptimage`. See [Credits & pricing](/vdocs/account/credits.md).

SFW only — OpenAI moderates server-side and rejects adult content outright.


---

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