MODEL IDkrea:krea@2-medium
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Krea 2 Medium

Krea
by Krea

Krea 2 Medium is the smaller, faster, and more cost-efficient variant in the Krea 2 family. It applies heavier post-training for especially stable and consistent outputs, making it a strong fit for illustration, anime, painting, graphic design, and other expressive visual workflows. It supports text-to-image and image-to-image generation, prompt interpretation strength through the creativity control, and up to 10 weighted reference images with both positive and negative guidance.

Krea 2 Medium

API Options

Platform-level options for task execution and delivery.

taskType

stringrequiredvalue: imageInference

Identifier for the type of task being performed

taskUUID

stringrequiredUUID v4

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

outputType

stringdefault: URL

Image output type.

Allowed values3 values

outputFormat

stringdefault: 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 values3 values

outputQuality

integermin: 20max: 99default: 95

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

webhookURL

stringURI

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 more1 resource

deliveryMethod

stringdefault: sync

Determines how the API delivers task results.

Allowed values2 values
Returns complete results directly in the API response.
Returns an immediate acknowledgment with the task UUID. Poll for results using getResponse.
Learn more1 resource

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.jpg

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

safety

object

Content safety checking configuration for image generation.

Properties1 property
safety » checkContent

checkContent

booleandefault: false

Enable or disable content safety checking.

ttl

integermin: 60

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

includeCost

booleandefault: false

Include task cost in the response.

numberResults

integermin: 1max: 20default: 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.

inputs » referenceImages

referenceImages

array of strings or objectsmin items: 1max items: 10

Style reference images for guiding generation. Each item can be a plain image input (UUID, URL, DataURI, or Base64) or an object with an image and a per-image strength.

Examples3 examples

Shorthand format: When you don't need to specify a custom strength, you can pass a plain image input directly. It will use the default influence strength.

"referenceImages": [
  "aac49721-1964-481a-ae78-8a4e29b91402"
]

Object format: When you need to control the exact influence of the reference image, use an object with image and strength. Positive values guide the output toward the reference; negative values guide away from it.

"referenceImages": [
  {
    "image": "aac49721-1964-481a-ae78-8a4e29b91402",
    "strength": 0.7
  }
]

Multiple images: You can provide multiple reference images and even mix both formats.

"referenceImages": [
  "aac49721-1964-481a-ae78-8a4e29b91402",
  {
    "image": "3ad204c3-a9de-4963-8a1a-c3911e3afafe",
    "strength": 1.2
  }
]
Format 1: string[]
string

Image input (UUID, URL, Data URI, or Base64).

Format 2: object[]2 properties
inputs » referenceImages » image

image

stringrequired

Image input (UUID, URL, Data URI, or Base64).

inputs » referenceImages » strength

strength

floatmin: 0max: 1default: 0.5

Influence strength of the reference image on the generated output.

Core Parameters

Primary parameters that define the task output.

model

stringrequiredvalue: krea:krea@2-medium

Identifier of the model to use for generation.

Learn more3 resources

positivePrompt

stringrequired

Text prompt describing elements to include in the generated output.

Learn more1 resource

width

integerrequired*paired with height

Width of the generated media in pixels.

Learn more2 resources

height

integerrequired*paired with width

Height of the generated media in pixels.

Learn more2 resources

seed

integermin: 0max: 9223372036854776000

Random seed for reproducible generation. When not provided, a random seed is generated in the unsigned 32-bit range.

Learn more1 resource

Settings

Technical parameters to fine-tune the inference process. These must be nested inside the settings object.

settings » creativity

creativity

stringdefault: medium

Creativity level. Controls how closely the model follows the prompt versus generating its own interpretation.

Allowed values4 values
settings » moodboards

moodboards

array of objectsitems: 1

Moodboards to use as creative direction. A moodboard is built from a group of images that share an overall creative direction: palette, texture, style, mood, or composition.

Properties2 properties
settings » moodboards » id

id

stringrequired

The identifier of the moodboard to use as creative direction.

Allowed values11 values
Retro Web
Futurist Glam
Coquette
Cyber Zine
Lo-Fi Cyanotype
Impasto Expressionism
Expressive Marker
Thermal Airbrush
Minimalist Sketch
Film Noir
Vintage Pop Graphic
settings » moodboards » strength

strength

floatmin: 0max: 1default: 0.23

Influence strength of the moodboard on the generated output.

Features

Standalone addons and post-processing features.

watermark

object

Configuration object for adding watermarks to generated videos. Watermarks can be applied using either text or image content with customizable positioning and appearance. You must provide either text or image content for the watermark, but not both.

"advancedFeatures": {
  "watermark": {
    "text": "© 2025 Company",
    "displayPosition": "bottom-right",
    "opacity": 0.6,
    "fontColor": "#ffffff",
    "bgColor": "#000000"
  }
}
"advancedFeatures": {
  "watermark": {
    "image": "c64351d5-4c59-42f7-95e1-eace013eddab",
    "displayPosition": "top-left",
    "opacity": 0.6
  }
}
"advancedFeatures": {
  "watermark": {
    "text": "PREVIEW",
    "tiled": true,
    "opacity": 0.4,
    "fontColor": "#cccccc"
  }
}
Properties7 properties
watermark » text

text

stringmin: 2max: 32

Watermark text.

watermark » image

image

string

Watermark image (UUID, URL, Data URI, or Base64).

watermark » displayPosition

Watermark position.

Allowed values9 values
watermark » tiled

tiled

boolean

Enable tiled watermark.

watermark » opacity

opacity

floatmin: 0.1max: 1step: 0.01

Watermark opacity.

watermark » fontColor

fontColor

string

Text color in hex format.

watermark » bgColor

bgColor

string

Background color in hex format.