---
title: Runway Gen-4 Image Turbo | Runware Docs
url: https://runware.ai/docs/models/runway-gen-4-image-turbo
description: Fast Gen-4 image generation for rapid creative iteration
---
# Runway Gen-4 Image Turbo

Runway Gen-4 Image Turbo is a faster Gen-4 image model for teams that need quick visual iteration. Generate concepts in seconds from text prompts or references while preserving key style and composition control. Ideal for testing ideas before higher cost image workflows.

- **ID**: `runway:4@2`
- **Status**: live
- **Creator**: Runway
- **Release Date**: August 19, 2025
- **Capabilities**: Image to Image

## Compatibility & Validation

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

---

The following dimension combinations are supported:

| Configuration | Dimensions |
| --- | --- |
| `1080p (16:9)` | `1920x1080` |
| `1080p (9:16)` | `1080x1920` |
| `1K (1:1)` | `1024x1024` |
| `1K (16:9)` | `1360x768` |
| `1080p (1:1)` | `1080x1080` |
| `1K (4:3)` | `1168x880` |
| `1080p (4:3)` | `1440x1080` |
| `1080p (3:4)` | `1080x1440` |
| `1K (21:9)` | `1808x768` |
| `1080p (21:9)` | `2112x912` |
| `720p (16:9)` | `1280x720` |
| `720p (9:16)` | `720x1280` |
| `720p (1:1)` | `720x720` |
| `720p (4:3)` | `960x720` |
| `720p (3:4)` | `720x960` |
| `720p (21:9)` | `1680x720` |

## Request Parameters

**API Options**

Platform-level options for task execution and delivery.

### [taskType](https://runware.ai/docs/models/runway-gen-4-image-turbo#request-tasktype)

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

Identifier for the type of task being performed

### [taskUUID](https://runware.ai/docs/models/runway-gen-4-image-turbo#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/runway-gen-4-image-turbo#request-outputtype)

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

Image output type.

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

### [outputFormat](https://runware.ai/docs/models/runway-gen-4-image-turbo#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/runway-gen-4-image-turbo#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/runway-gen-4-image-turbo#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/runway-gen-4-image-turbo#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/runway-gen-4-image-turbo#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/runway-gen-4-image-turbo#request-safety)

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

Content safety checking configuration for image generation.

#### [checkContent](https://runware.ai/docs/models/runway-gen-4-image-turbo#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/runway-gen-4-image-turbo#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/runway-gen-4-image-turbo#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/runway-gen-4-image-turbo#request-includecost)

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

Include task cost in the response.

### [numberResults](https://runware.ai/docs/models/runway-gen-4-image-turbo#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/runway-gen-4-image-turbo#request-inputs-referenceimages)

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

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/runway-gen-4-image-turbo#request-model)

- **Type**: `string`
- **Required**: true
- **Value**: `runway:4@2`

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/runway-gen-4-image-turbo#request-positiveprompt)

- **Type**: `string`
- **Required**: true
- **Min**: `1`
- **Max**: `1000`

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/runway-gen-4-image-turbo#request-width)

- **Type**: `integer`
- **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/runway-gen-4-image-turbo#request-height)

- **Type**: `integer`
- **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.runway\` object.

### [contentModeration](https://runware.ai/docs/models/runway-gen-4-image-turbo#request-providersettings-runway-contentmoderation)

- **Path**: `providerSettings.runway.contentModeration`
- **Type**: `object (1 property)`

Content moderation settings.

#### [publicFigureThreshold](https://runware.ai/docs/models/runway-gen-4-image-turbo#request-providersettings-runway-contentmoderation-publicfigurethreshold)

- **Path**: `providerSettings.runway.contentModeration.publicFigureThreshold`
- **Type**: `string`
- **Default**: `auto`

Public figure filtering strictness.

**Allowed values**:

- `auto` Automatic filtering.
- `low` Less strict filtering.

## Response Parameters

### [taskType](https://runware.ai/docs/models/runway-gen-4-image-turbo#response-tasktype)

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

Type of the task.

### [taskUUID](https://runware.ai/docs/models/runway-gen-4-image-turbo#response-taskuuid)

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

UUID of the task.

### [imageUUID](https://runware.ai/docs/models/runway-gen-4-image-turbo#response-imageuuid)

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

UUID of the output image.

### [imageURL](https://runware.ai/docs/models/runway-gen-4-image-turbo#response-imageurl)

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

URL of the output image.

### [imageBase64Data](https://runware.ai/docs/models/runway-gen-4-image-turbo#response-imagebase64data)

- **Type**: `string`

Base64-encoded image data.

### [imageDataURI](https://runware.ai/docs/models/runway-gen-4-image-turbo#response-imagedatauri)

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

Data URI of the output image.

### [seed](https://runware.ai/docs/models/runway-gen-4-image-turbo#response-seed)

- **Type**: `integer`

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

### [NSFWContent](https://runware.ai/docs/models/runway-gen-4-image-turbo#response-nsfwcontent)

- **Type**: `boolean`

Flag indicating if NSFW content was detected.

### [cost](https://runware.ai/docs/models/runway-gen-4-image-turbo#response-cost)

- **Type**: `float`

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

## Examples

### Art Deco Aquarium Concourse (Image to Image)

![Art Deco Aquarium Concourse](https://assets.runware.ai/examples/runway-gen-4-image-turbo/08b89a9f-f459-47a1-8bf7-1ff5aa43af14.jpg)

**Request**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "0ee13cbd-6941-49fb-b5cc-90be6737ebea",
  "model": "runway:4@2",
  "positivePrompt": "Blend the structure and elegance of a 1930s art deco transit concourse with the immersive spectacle of a giant aquarium tunnel, creating a majestic public interior where arched brass-and-stone architecture frames towering curved glass tanks filled with swirling fish and drifting rays. Polished terrazzo floors reflecting blue water patterns, ornamental geometric motifs, refined signage, distant travelers for scale, cinematic depth, crisp architectural lines, luxurious materials, atmospheric volumetric light, highly detailed concept art, vivid yet tasteful color contrast, imaginative and believable worldbuilding.",
  "width": 1440,
  "height": 1080,
  "providerSettings": {
    "runway": {
      "contentModeration": {
        "publicFigureThreshold": "auto"
      }
    }
  },
  "inputs": {
    "referenceImages": [
      "https://assets.runware.ai/assets/inputs/e7ea04ec-0197-42bb-be69-bc7829110eff.jpg",
      "https://assets.runware.ai/assets/inputs/8eadb94a-f122-4637-99ac-ea448181e371.jpg"
    ]
  }
}
```

**Response**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "0ee13cbd-6941-49fb-b5cc-90be6737ebea",
  "imageUUID": "1255868f-309b-4798-a01d-6ca7aa302f36",
  "imageURL": "https://im.runware.ai/image/os/a04d20/ws/2/ii/1255868f-309b-4798-a01d-6ca7aa302f36.jpg",
  "seed": 557572411,
  "cost": 0.02
}
```

---

### Rain-Slicked Monorail Arrival (Image to Image)

![Rain-Slicked Monorail Arrival](https://assets.runware.ai/examples/runway-gen-4-image-turbo/0a854cec-7fe5-45df-b5ff-c87c928c952b.jpg)

**Request**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "71b26342-2728-4c95-a35e-f5618419d3fa",
  "model": "runway:4@2",
  "positivePrompt": "Transform the reference scene into a retro-futurist monorail station at blue hour, preserving the platform layout and viewing angle while reimagining the architecture with streamlined alloy canopies, glowing route bands, polished concrete, and misty rain reflections. A sleek silver monorail glides in from the curve, passengers in structured travel coats and translucent umbrellas, subtle steam drifting near the tracks, distant high-rise silhouettes softened by drizzle, amber and cyan lighting accents, tactile surfaces, cinematic atmosphere, highly detailed, dynamic yet believable urban design.",
  "width": 1360,
  "height": 768,
  "providerSettings": {
    "runway": {
      "contentModeration": {
        "publicFigureThreshold": "auto"
      }
    }
  },
  "inputs": {
    "referenceImages": [
      "https://assets.runware.ai/assets/inputs/839c0b5a-05dc-49ac-b5d1-e518d8b421ee.jpg"
    ]
  }
}
```

**Response**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "71b26342-2728-4c95-a35e-f5618419d3fa",
  "imageUUID": "80314f5f-13f2-4dcd-a3b0-601a9114d851",
  "imageURL": "https://im.runware.ai/image/os/a06dlim3/ws/2/ii/80314f5f-13f2-4dcd-a3b0-601a9114d851.jpg",
  "seed": 321962668,
  "cost": 0.02
}
```

---

### Wind-Carved Salt Flats Caravan (Image to Image)

![Wind-Carved Salt Flats Caravan](https://assets.runware.ai/examples/runway-gen-4-image-turbo/cc0f2e5c-af1d-473a-837f-4384bd6f40ca.jpg)

**Request**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "de2d6177-7379-4990-bd39-1c07e23b3202",
  "model": "runway:4@2",
  "positivePrompt": "Transform the reference into a sweeping cinematic scene of a nomadic research caravan traversing immense salt flats shaped by wind into delicate ridges and spirals. Replace the truck with a convoy of elegantly engineered amphibious crawler vehicles carrying stacked specimen crates, rolled survey kites, antenna masts, and sun-faded expedition flags. In the distance, towering mineral pillars rise from the horizon like natural sculptures. The ground reflects soft apricot and silver tones, with thin drifting dust and subtle heat shimmer. Emphasize scale, negative space, refined industrial design, crisp textures, and dramatic environmental storytelling. Ultra-detailed, high realism with artful color grading, expansive sky, low-angle cinematic framing.",
  "width": 1440,
  "height": 1080,
  "providerSettings": {
    "runway": {
      "contentModeration": {
        "publicFigureThreshold": "auto"
      }
    }
  },
  "inputs": {
    "referenceImages": [
      "https://assets.runware.ai/assets/inputs/fecda3d9-78b1-4453-adc2-a3fbadc30af9.jpg"
    ]
  }
}
```

**Response**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "de2d6177-7379-4990-bd39-1c07e23b3202",
  "imageUUID": "cc87393e-891e-482c-bd09-35e8ccc27ac4",
  "imageURL": "https://im.runware.ai/image/os/a01d21/ws/2/ii/cc87393e-891e-482c-bd09-35e8ccc27ac4.jpg",
  "seed": 835194475,
  "cost": 0.02
}
```

---

### Clockwork Greenhouse Fashion Editorial (Image to Image)

![Clockwork Greenhouse Fashion Editorial](https://assets.runware.ai/examples/runway-gen-4-image-turbo/e2a3bbc3-ada8-4f3d-b0ce-da61d3e14645.jpg)

**Request**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "4b481409-2858-490d-9bfd-263ff9a20e67",
  "model": "runway:4@2",
  "positivePrompt": "Transform the reference into an elaborate retrofuturist couture scene inside a vast glass conservatory filled with brass mechanisms, oversized fern fronds, suspended gears, polished copper piping, and creeping vines weaving through ornate machinery. Preserve the standing pose and central composition from the reference image, but restyle the outfit into sculptural high fashion with layered metallic fabrics, pleated panels, intricate mechanical embellishments, and dramatic silhouette. Add warm amber highlights, pale green atmospheric haze, crisp glass reflections, richly detailed textures, editorial photography aesthetic, cinematic depth, refined color harmony, inventive worldbuilding, premium fashion magazine quality.",
  "width": 1168,
  "height": 880,
  "providerSettings": {
    "runway": {
      "contentModeration": {
        "publicFigureThreshold": "auto"
      }
    }
  },
  "inputs": {
    "referenceImages": [
      "https://assets.runware.ai/assets/inputs/a0338be7-12b9-4298-bb66-04851b7c1b51.jpg"
    ]
  }
}
```

**Response**:

```json
{
  "taskType": "imageInference",
  "taskUUID": "4b481409-2858-490d-9bfd-263ff9a20e67",
  "imageUUID": "d0752792-0016-4aeb-8f8a-a28d7afb611b",
  "imageURL": "https://im.runware.ai/image/os/a07dlim3/ws/2/ii/d0752792-0016-4aeb-8f8a-a28d7afb611b.jpg",
  "seed": 1025601214,
  "cost": 0.02
}
```