---
title: GPT Image 1.5 | Runware Docs
url: https://runware.ai/docs/models/openai-gpt-image-1-5
description: GPT Image 1.5 flagship image model with faster generation and enhanced editing
---
# GPT Image 1.5

GPT Image 1.5 is OpenAI’s newest flagship image model powering the latest ChatGPT Images. It delivers significantly faster image generation with stronger instruction following, more precise edits that preserve original details, more believable transformations, and improved rendering of dense or small text. It is suited for practical creative workflows, detailed design tasks, and production use cases.

- **ID**: `openai:4@1`
- **Status**: live
- **Creator**: OpenAI
- **Release Date**: December 16, 2025
- **Capabilities**: Text to Image, Image to Image, Image Editing

## Pricing

Input costs: ~$0.005/1K tokens (text) & ~$0.008/1k tokens (image). Added on top of output costs.

- **1024x1024 · Low quality**: `$0.009`
- **1024x1536 · Low quality**: `$0.013`
- **1536x1024 · Low quality**: `$0.013`
- **1024x1024 · Medium quality**: `$0.034`
- **1024x1536 · Medium quality**: `$0.051`
- **1536x1024 · Medium quality**: `$0.05`
- **1024x1024 · High quality**: `$0.133`
- **1024x1536 · High quality**: `$0.20`
- **1536x1024 · High quality**: `$0.199`

## Compatibility & Validation

`width` and `height` must be used together.

---

The following dimension combinations are supported:

| Configuration | Dimensions |
| --- | --- |
| `1K (1:1)` | `1024x1024` |
| `1K (3:2)` | `1536x1024` |
| `1K (2:3)` | `1024x1536` |

## Request Parameters

**API Options**

Platform-level options for task execution and delivery.

### [taskType](https://runware.ai/docs/models/openai-gpt-image-1-5#request-tasktype)

- **Type**: `string`
- **Required**: true
- **Value**: `imageInference`

Identifier for the type of task being performed

### [taskUUID](https://runware.ai/docs/models/openai-gpt-image-1-5#request-taskuuid)

- **Type**: `string`
- **Required**: true
- **Format**: `UUID v4`

UUID v4 identifier for tracking tasks and matching async responses. Must be unique per task.

### [outputType](https://runware.ai/docs/models/openai-gpt-image-1-5#request-outputtype)

- **Type**: `string`
- **Default**: `URL`

Image output type.

**Allowed values**: `URL` `base64Data` `dataURI`

### [outputFormat](https://runware.ai/docs/models/openai-gpt-image-1-5#request-outputformat)

- **Type**: `string`
- **Default**: `JPG`

Specifies the file format of the generated output. The available values depend on the task type and the specific model's capabilities.

- \`JPG\`: Best for photorealistic images with smaller file sizes (no transparency).
- \`PNG\`: Lossless compression, supports high quality and transparency (alpha channel).
- \`WEBP\`: Modern format providing superior compression and transparency support.

> [!NOTE]
> \*\*Transparency\*\*: If you are using features like background removal or LayerDiffuse that require transparency, you must select a format that supports an alpha channel (e.g., \`PNG\`, \`WEBP\`, \`TIFF\`). \`JPG\` does not support transparency.

**Allowed values**: `JPG` `PNG` `WEBP`

### [outputQuality](https://runware.ai/docs/models/openai-gpt-image-1-5#request-outputquality)

- **Type**: `integer`
- **Min**: `20`
- **Max**: `99`
- **Default**: `95`

Compression quality of the output. Higher values preserve quality but increase file size.

### [webhookURL](https://runware.ai/docs/models/openai-gpt-image-1-5#request-webhookurl)

- **Type**: `string`
- **Format**: `URI`

Specifies a webhook URL where JSON responses will be sent via HTTP POST when generation tasks complete. For batch requests with multiple results, each completed item triggers a separate webhook call as it becomes available.

**Learn more** (1 resource):

- [Webhooks](https://runware.ai/docs/platform/webhooks) (platform)

### [deliveryMethod](https://runware.ai/docs/models/openai-gpt-image-1-5#request-deliverymethod)

- **Type**: `string`
- **Default**: `sync`

Determines how the API delivers task results.

**Allowed values**:

- `sync` Returns complete results directly in the API response.
- `async` Returns an immediate acknowledgment with the task UUID. Poll for results using getResponse.

**Learn more** (1 resource):

- [Task Polling](https://runware.ai/docs/platform/task-polling) (platform)

### [uploadEndpoint](https://runware.ai/docs/models/openai-gpt-image-1-5#request-uploadendpoint)

- **Type**: `string`
- **Format**: `URI`

Specifies a URL where the generated content will be automatically uploaded using the HTTP PUT method. The raw binary data of the media file is sent directly as the request body. For secure uploads to cloud storage, use presigned URLs that include temporary authentication credentials.

**Common use cases:**

- **Cloud storage**: Upload directly to S3 buckets, Google Cloud Storage, or Azure Blob Storage using presigned URLs.
- **CDN integration**: Upload to content delivery networks for immediate distribution.

```text
// S3 presigned URL for secure upload
https://your-bucket.s3.amazonaws.com/generated/content.mp4?X-Amz-Signature=abc123&X-Amz-Expires=3600

// Google Cloud Storage presigned URL
https://storage.googleapis.com/your-bucket/content.jpg?X-Goog-Signature=xyz789

// Custom storage endpoint
https://storage.example.com/uploads/generated-image.jpg
```

The content data will be sent as the request body to the specified URL when generation is complete.

### [safety](https://runware.ai/docs/models/openai-gpt-image-1-5#request-safety)

- **Path**: `safety.checkContent`
- **Type**: `object (2 properties)`

Content safety checking configuration for image generation.

#### [checkContent](https://runware.ai/docs/models/openai-gpt-image-1-5#request-safety-checkcontent)

- **Path**: `safety.checkContent`
- **Type**: `boolean`
- **Default**: `false`

Enable or disable content safety checking. When enabled, defaults to `fast` mode.

#### [mode](https://runware.ai/docs/models/openai-gpt-image-1-5#request-safety-mode)

- **Path**: `safety.mode`
- **Type**: `string`
- **Default**: `none`

Safety checking mode for image generation.

**Allowed values**:

- `none` Disables checking.
- `fast` Performs a single check.

### [ttl](https://runware.ai/docs/models/openai-gpt-image-1-5#request-ttl)

- **Type**: `integer`
- **Min**: `60`

Time-to-live (TTL) in seconds for generated content. Only applies when `outputType` is `URL`.

### [includeCost](https://runware.ai/docs/models/openai-gpt-image-1-5#request-includecost)

- **Type**: `boolean`
- **Default**: `false`

Include task cost in the response.

### [numberResults](https://runware.ai/docs/models/openai-gpt-image-1-5#request-numberresults)

- **Type**: `integer`
- **Min**: `1`
- **Max**: `20`
- **Default**: `1`

Number of results to generate. Each result uses a different seed, producing variations of the same parameters.

**Inputs**

Input resources for the task (images, audio, etc). These must be nested inside the \`inputs\` object.

### [referenceImages](https://runware.ai/docs/models/openai-gpt-image-1-5#request-inputs-referenceimages)

- **Path**: `inputs.referenceImages`
- **Type**: `array of strings`

List of reference images (UUID, URL, Data URI, or Base64).

**Generation Parameters**

Core parameters for controlling the generated content.

### [model](https://runware.ai/docs/models/openai-gpt-image-1-5#request-model)

- **Type**: `string`
- **Required**: true
- **Value**: `openai:4@1`

Identifier of the model to use for generation.

**Learn more** (3 resources):

- [Text To Image: Model Selection The Foundation Of Generation](https://runware.ai/docs/guides/text-to-image#model-selection-the-foundation-of-generation) (guide)
- [Image Inpainting: Model Specialized Inpainting Models](https://runware.ai/docs/guides/image-inpainting#model-specialized-inpainting-models) (guide)
- [Image Outpainting: Other Critical Parameters](https://runware.ai/docs/guides/image-outpainting#other-critical-parameters) (guide)

### [positivePrompt](https://runware.ai/docs/models/openai-gpt-image-1-5#request-positiveprompt)

- **Type**: `string`
- **Required**: true
- **Min**: `2`
- **Max**: `32000`

Text prompt describing elements to include in the generated output.

**Learn more** (2 resources):

- [Text To Image: Prompts Guiding The Generation](https://runware.ai/docs/guides/text-to-image#prompts-guiding-the-generation) (guide)
- [Image Outpainting: Other Critical Parameters](https://runware.ai/docs/guides/image-outpainting#other-critical-parameters) (guide)

### [width](https://runware.ai/docs/models/openai-gpt-image-1-5#request-width)

- **Type**: `integer`
- **Required**: true
- **Paired with**: height

Width of the generated media in pixels.

**Learn more** (2 resources):

- [Image To Image: Dimensions Changing Aspect Ratio](https://runware.ai/docs/guides/image-to-image#dimensions-changing-aspect-ratio) (guide)
- [Image Outpainting: Dimensions Critical For Outpainting](https://runware.ai/docs/guides/image-outpainting#dimensions-critical-for-outpainting) (guide)

### [height](https://runware.ai/docs/models/openai-gpt-image-1-5#request-height)

- **Type**: `integer`
- **Required**: true
- **Paired with**: width

Height of the generated media in pixels.

**Learn more** (2 resources):

- [Image To Image: Dimensions Changing Aspect Ratio](https://runware.ai/docs/guides/image-to-image#dimensions-changing-aspect-ratio) (guide)
- [Image Outpainting: Dimensions Critical For Outpainting](https://runware.ai/docs/guides/image-outpainting#dimensions-critical-for-outpainting) (guide)

**Provider Settings**

Parameters specific to this model provider. These must be nested inside the \`providerSettings.openai\` object.

### [background](https://runware.ai/docs/models/openai-gpt-image-1-5#request-providersettings-openai-background)

- **Path**: `providerSettings.openai.background`
- **Type**: `string`
- **Default**: `auto`

Background handling in generated images.

**Allowed values**:

- `auto` Automatically determines the most appropriate background based on content.
- `opaque` Solid background, no transparency.
- `transparent` Transparent background areas where applicable.

### [quality](https://runware.ai/docs/models/openai-gpt-image-1-5#request-providersettings-openai-quality)

- **Path**: `providerSettings.openai.quality`
- **Type**: `string`
- **Default**: `auto`

Image quality level.

**Allowed values**:

- `auto` Automatically selects optimal quality based on context.
- `high` Maximum quality with enhanced detail and refinement.
- `medium` Balanced quality suitable for most use cases.
- `low` Faster generation with acceptable quality for rapid iteration.

## Response Parameters

### [taskType](https://runware.ai/docs/models/openai-gpt-image-1-5#response-tasktype)

- **Type**: `string`
- **Required**: true
- **Value**: `imageInference`

Type of the task.

### [taskUUID](https://runware.ai/docs/models/openai-gpt-image-1-5#response-taskuuid)

- **Type**: `string`
- **Required**: true
- **Format**: `UUID v4`

UUID of the task.

### [imageUUID](https://runware.ai/docs/models/openai-gpt-image-1-5#response-imageuuid)

- **Type**: `string`
- **Required**: true
- **Format**: `UUID v4`

UUID of the output image.

### [imageURL](https://runware.ai/docs/models/openai-gpt-image-1-5#response-imageurl)

- **Type**: `string`
- **Format**: `URI`

URL of the output image.

### [imageBase64Data](https://runware.ai/docs/models/openai-gpt-image-1-5#response-imagebase64data)

- **Type**: `string`

Base64-encoded image data.

### [imageDataURI](https://runware.ai/docs/models/openai-gpt-image-1-5#response-imagedatauri)

- **Type**: `string`
- **Format**: `URI`

Data URI of the output image.

### [seed](https://runware.ai/docs/models/openai-gpt-image-1-5#response-seed)

- **Type**: `integer`

The seed used for generation. If none was provided, shows the randomly generated seed.

### [NSFWContent](https://runware.ai/docs/models/openai-gpt-image-1-5#response-nsfwcontent)

- **Type**: `boolean`

Flag indicating if NSFW content was detected.

### [cost](https://runware.ai/docs/models/openai-gpt-image-1-5#response-cost)

- **Type**: `float`

Task cost in USD. Present when `includeCost` is set to `true` in the request.

## Examples

### Luminescent Botanical Observatory Interior (Text to Image)

![Luminescent Botanical Observatory Interior](https://assets.runware.ai/examples/openai-gpt-image-1-5/73cadf99-4353-4f20-86b2-a30480ec1d02.jpg)

**Request**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "3d582d50-3e2b-47b2-bd02-839f962a7b38",
  "model": "openai:4@1",
  "positivePrompt": "A grand interior of a moonlit botanical observatory built inside a glass-domed conservatory on a cliff above a bioluminescent sea, art nouveau meets retro-futurist science design. In the center stands a circular brass orrery entwined with glowing vines and rare night-blooming flowers. Curators in elegant field coats examine luminous specimens under suspended lanterns. Shelves of labeled apothecary jars, botanical sketches pinned to cork boards, polished stone floors reflecting blue-green light, delicate fog near the ground, distant storm clouds beyond the glass dome. Include crisp, believable small text on a few signs and labels such as 'Specimen Archive', 'Lunar Orchid Wing', and 'Humidity 78%'. Cinematic wide composition, exquisite material detail, believable perspective, soft atmospheric depth, rich teal, amber, and violet palette, serene wonder, highly detailed, premium editorial concept art realism.",
  "width": 1536,
  "height": 1024,
  "providerSettings": {
    "openai": {
      "background": "opaque",
      "quality": "high"
    }
  }
}
```

**Response**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "3d582d50-3e2b-47b2-bd02-839f962a7b38",
  "imageUUID": "bab1270c-0382-49dc-9644-4509a33c7da7",
  "imageURL": "https://im.runware.ai/image/os/a13d12/ws/3/ii/bab1270c-0382-49dc-9644-4509a33c7da7.jpg",
  "cost": 0.19961
}
```

---

### Bioluminescent Art Nouveau Portrait (Image to Image)

![Bioluminescent Art Nouveau Portrait](https://assets.runware.ai/examples/openai-gpt-image-1-5/b1877cb6-3895-4e11-b750-adcb62b1c613.jpg)

**Request**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "ad671763-1107-4d37-b677-5139195552d6",
  "model": "openai:4@1",
  "positivePrompt": "Transform the reference portrait into a luxurious Art Nouveau poster portrait infused with deep-sea bioluminescent fantasy. Preserve the subject's facial identity, pose, gaze direction, and upper-body framing from the reference image. Replace the simple outfit with an elegant gown made of layered translucent fabrics, pearl details, and subtle shell-inspired ornamentation. Surround her with flowing organic linework, iridescent jellyfish-glass motifs, moonlit teal and violet glow, gilded border accents, and delicate typography-like decorative shapes that feel like a vintage exhibition print without relying on readable text. Rich painterly detail, believable skin, refined hands, symmetrical composition, premium editorial finish, dramatic yet graceful mood.",
  "width": 1024,
  "height": 1536,
  "providerSettings": {
    "openai": {
      "background": "opaque",
      "quality": "high"
    }
  },
  "inputs": {
    "referenceImages": [
      "https://assets.runware.ai/assets/inputs/2c91d5eb-995a-4a87-a20b-1270e1b1891e.jpg"
    ]
  }
}
```

**Response**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "ad671763-1107-4d37-b677-5139195552d6",
  "imageUUID": "1acd62f5-17a6-4be9-8276-edefd7b9417e",
  "imageURL": "https://im.runware.ai/image/os/a25d05/ws/3/ii/1acd62f5-17a6-4be9-8276-edefd7b9417e.jpg",
  "cost": 0.20312
}
```

---

### Retro-Futurist Observatory Sticker Sheet (Text to Image)

![Retro-Futurist Observatory Sticker Sheet](https://assets.runware.ai/examples/openai-gpt-image-1-5/c794832e-9049-4541-ad69-59fe6b206113.jpg)

**Request**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "68b17b80-5386-418f-933a-4884f5ce6b51",
  "model": "openai:4@1",
  "positivePrompt": "A premium sticker-sheet style illustration on a transparent background: a retro-futurist moon observatory collection composed of isolated cutout elements arranged neatly in one square frame, including a brass telescope dome with glowing teal windows, a tiny rover carrying crystal samples, a crescent moon map panel, a star chart clipboard, a thermos with constellation decals, cables, bolts, patches, and small scientific instruments. Clean separation between objects, crisp edges, no backdrop, no floor, no scene environment, each object fully visible and floating independently. Rich mid-century sci-fi design, enamel pin and screenprint aesthetic, saturated coral, teal, cream, and gold palette, intricate linework, subtle shading, polished graphic design, exceptional clarity, tiny legible labels and emblem-style markings.",
  "width": 1024,
  "height": 1024,
  "providerSettings": {
    "openai": {
      "background": "transparent",
      "quality": "high"
    }
  }
}
```

**Response**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "68b17b80-5386-418f-933a-4884f5ce6b51",
  "imageUUID": "2a2178c0-c736-4c73-8700-9b2b06ae0857",
  "imageURL": "https://im.runware.ai/image/os/a16d07/ws/2/ii/2a2178c0-c736-4c73-8700-9b2b06ae0857.jpg",
  "cost": 0.13392
}
```

---

### Retro-Futurist Metro Poster (Text to Image)

![Retro-Futurist Metro Poster](https://assets.runware.ai/examples/openai-gpt-image-1-5/a2bda60a-f221-4ef8-8103-d502a29238f3.jpg)

**Request**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "2a99f619-403d-4dd6-97ee-465d80c131d2",
  "model": "openai:4@1",
  "positivePrompt": "A meticulously designed retro-futurist subway advertisement poster mounted inside a pristine glass transit shelter at blue hour, centered composition, bold graphic design, premium print finish, art deco meets optimistic 1970s sci-fi. Main subject: a sleek silver magnetic train gliding into a luminous underground station with amber and teal accent lighting, tiny commuters in fashionable coats, polished terrazzo floors reflecting signage. Include abundant crisp, readable poster typography integrated into the artwork: large headline 'ORBITAL LINE CITY PASS', subheading 'Unlimited rides across 12 districts', pricing badge '$24 WEEKLY', feature list 'Night Metro / River Tram / Skybridge Express', footer text 'Valid from 01 Oct 2086', 'Tap once, go everywhere', and a small route map legend with station names in neat micro text. Add a corner seal reading 'Metropolitan Transit Bureau'. Make all text clean, correctly spelled, and convincingly printed. Rich paper texture, subtle ink grain, precise linework, elegant geometry, cinematic urban background beyond the shelter with light rain on pavement, moody but hopeful atmosphere, highly detailed, sharp focus, premium editorial poster aesthetic.",
  "width": 1536,
  "height": 1024,
  "providerSettings": {
    "openai": {
      "background": "opaque",
      "quality": "high"
    }
  }
}
```

**Response**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "2a99f619-403d-4dd6-97ee-465d80c131d2",
  "imageUUID": "aa5e4585-3c3c-4103-9381-05c30be0f222",
  "imageURL": "https://im.runware.ai/image/os/a15d18/ws/3/ii/aa5e4585-3c3c-4103-9381-05c30be0f222.jpg",
  "cost": 0.19984
}
```