Imagen 4 Preview
Imagen 4 Preview is Google's next generation text to image model for developers. It supports 2K resolution with improved detail rendering and robust typography control. Use it to generate photorealistic or stylized assets for product shots, slides, marketing visuals, and prototypes.
API Options
Platform-level options for task execution and delivery.
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taskType
string required value: imageInference -
Identifier for the type of task being performed
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taskUUID
string required UUID v4 -
UUID v4 identifier for tracking tasks and matching async responses. Must be unique per task.
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outputType
string default: URL -
Image output type.
Allowed values 3 values
-
outputFormat
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.
**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 3 values
-
outputQuality
integer min: 20 max: 99 default: 95 -
Compression quality of the output. Higher values preserve quality but increase file size.
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webhookURL
string 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 PLATFORM
- Webhooks
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deliveryMethod
string default: sync -
Determines how the API delivers task results.
Allowed values 2 values
- Returns complete results directly in the API response.
- Returns an immediate acknowledgment with the task UUID. Poll for results using getResponse.
Learn more 1 resource
- Task Polling PLATFORM
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uploadEndpoint
string 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.
// 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.jpgThe content data will be sent as the request body to the specified URL when generation is complete.
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safety
object -
Content safety checking configuration for image generation.
Properties 2 properties
-
safety»checkContentcheckContent
boolean default: false -
Enable or disable content safety checking. When enabled, defaults to
fastmode.
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safety»modemode
string default: none -
Safety checking mode for image generation.
Allowed values 2 values
- Disables checking.
- Performs a single check.
-
-
ttl
integer min: 60 -
Time-to-live (TTL) in seconds for generated content. Only applies when
outputTypeisURL.
-
includeCost
boolean default: false -
Include task cost in the response.
-
numberResults
integer min: 1 max: 20 default: 1 -
Number of results to generate. Each result uses a different seed, producing variations of the same parameters.
Generation Parameters
Core parameters for controlling the generated content.
-
model
string required value: google:2@1 -
Identifier of the model to use for generation.
Learn more 3 resources
-
positivePrompt
string required min: 2 max: 3000 -
Text prompt describing elements to include in the generated output.
Learn more 2 resources
-
Width of the generated media in pixels.
Learn more 2 resources
-
Height of the generated media in pixels.
Learn more 2 resources
Tidal Glass Forge Interior
{
"taskType": "imageInference",
"taskUUID": "0623dfb2-8f17-4cbe-a46f-08fdf65f7290",
"model": "google:2@1",
"positivePrompt": "A vast artisanal glass forge built inside the ribbed hull of an ancient ship converted into a workshop, set above a cold gray tidal basin at low water. Long worktables covered with chisels, molds, sketches, and translucent glass fragments. Master craftspeople in heat-worn aprons shaping enormous stained-glass panels that depict sea creatures and storm maps. Suspended pulley cranes lift glowing sheets of molten glass while pale morning light pours through patchwork windows and mixes with furnace glow, casting prismatic reflections across wet timber floors. In the distance beyond open hull arches, scattered fishing boats rest on the exposed seabed. Ultra-detailed materials: scorched wood grain, soot-streaked beams, hammered copper vats, rippling reflections, realistic smoke haze, intricate glass textures, tiny tool marks. Include a painted sign hanging from a beam with clearly readable text: \"Harbor Glassworks\". Cinematic wide shot, layered depth, high detail, natural color contrast, realistic yet slightly storybook atmosphere.",
"width": 1408,
"height": 768
}{
"taskType": "imageInference",
"taskUUID": "0623dfb2-8f17-4cbe-a46f-08fdf65f7290",
"imageUUID": "56139931-64bf-42b8-8abc-af5bed379e3e",
"imageURL": "https://im.runware.ai/image/os/a11d13/ws/2/ii/56139931-64bf-42b8-8abc-af5bed379e3e.jpg",
"seed": 71986374,
"cost": 0.04
}Volcanic Violin Workshop Tableau
{
"taskType": "imageInference",
"taskUUID": "92aecaac-152d-4c87-b512-473631b3a588",
"model": "google:2@1",
"positivePrompt": "A cinematic wide scene of an open-air violin maker's workshop built on dark basalt terraces beside a slow lava channel, master craftswoman shaping a violin while assistants polish wood and sort amber varnish bottles, suspended copper tools, carved instrument molds, heat shimmer, glowing embers, smoke drifting upward into a vast cavern opening, distant rope bridges and pulley lifts carrying timber, rich textures of charred stone, figured maple, spruce grain, hammered metal, and ash-dusted fabric. Include a wooden shipping crate in the foreground clearly stenciled with readable text: FRAGILE STRINGS, and a hanging sign with elegant readable lettering: AURELIA VIOLINS. Stylized realism, dramatic warm highlights against deep shadow, ultra-detailed surfaces, strong depth, atmospheric perspective, refined composition, premium editorial image quality.",
"width": 1408,
"height": 768
}{
"taskType": "imageInference",
"taskUUID": "92aecaac-152d-4c87-b512-473631b3a588",
"imageUUID": "bce952ec-e642-4c2b-bf49-66a7d15394b8",
"imageURL": "https://im.runware.ai/image/os/a13d12/ws/2/ii/bce952ec-e642-4c2b-bf49-66a7d15394b8.jpg",
"seed": 816470351,
"cost": 0.04
}Cathedral Aquarium Wedding Banquet
{
"taskType": "imageInference",
"taskUUID": "0082b5c3-2225-431a-931b-c00e6b68450d",
"model": "google:2@1",
"positivePrompt": "A lavish wedding banquet inside a grand cathedral-like aquarium hall, long tables dressed in ivory fabric and silver glassware, dozens of guests in formal attire, a bride and groom standing beneath soaring ribbed arches, immense floor-to-ceiling aquarium windows replacing stained glass, schools of manta rays and shimmering fish gliding outside in deep blue water, soft golden candlelight reflecting across polished marble, suspended floral arrangements in cream and pale coral tones, cinematic depth, ultra-detailed textures, believable human expressions and hands, intricate fabric folds, realistic reflections, atmospheric grandeur. Include a beautifully designed welcome sign near the entrance with crisp readable text: 'Aurelia & Soren' and below it 'Celebration Supper'. Photorealistic, high detail, balanced composition, wide-angle interior scene.",
"width": 1408,
"height": 768
}{
"taskType": "imageInference",
"taskUUID": "0082b5c3-2225-431a-931b-c00e6b68450d",
"imageUUID": "97ff9d0c-88a6-43a0-8973-f558d30f5d51",
"imageURL": "https://im.runware.ai/image/os/a08d21/ws/2/ii/97ff9d0c-88a6-43a0-8973-f558d30f5d51.jpg",
"seed": 1708892127,
"cost": 0.04
}Subterranean Botanical Tram Station
{
"taskType": "imageInference",
"taskUUID": "6089b4b9-77cb-45bd-a303-7ef268595ad4",
"model": "google:2@1",
"positivePrompt": "A vast underground tram station transformed into a thriving indoor conservatory, viewed from platform level in a wide cinematic composition. Sleek copper-and-glass tram cars rest beside stone platforms lined with giant ferns, hanging orchids, moss-covered beams, and carefully arranged planters. Shafts of warm sunlight pour through circular skylights in the cavern ceiling, illuminating drifting dust and soft mist from irrigation pipes. Commuters in tailored earth-tone clothing carry umbrellas, satchels, and flower crates, creating a calm early-morning atmosphere. Elegant wayfinding signage is integrated into the architecture with crisp readable text: 'PLATFORM 3', 'RIVER LOOP', and 'LAST DEPARTURE 08:42'. Highly detailed textures on polished rails, wet tile, weathered stone, brushed metal, and glass reflections. Balanced composition, believable scale, natural color palette of jade, amber, terracotta, and charcoal, ultra-detailed, premium commercial visual, atmospheric depth, refined realism.",
"width": 1408,
"height": 768
}{
"taskType": "imageInference",
"taskUUID": "6089b4b9-77cb-45bd-a303-7ef268595ad4",
"imageUUID": "04cbd159-2c18-4556-bdd5-16434c67dd1d",
"imageURL": "https://im.runware.ai/image/os/a02d21/ws/2/ii/04cbd159-2c18-4556-bdd5-16434c67dd1d.jpg",
"seed": 818600052,
"cost": 0.04
}