Stable Diffusion XL v1.0 VAE Fix
Stable Diffusion XL v1.0 VAE Fix is the SDXL 1.0 base checkpoint packaged with a corrected VAE for more stable inference. It keeps SDXL's strong prompt understanding, broad visual range, native 1024x1024 generation, and support for both text-to-image and image-to-image workflows, while reducing the artifact and decoding issues associated with the original embedded VAE.
Complete technical specification for integration
Ready-to-use code snippets for common workflows
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
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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
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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
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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.
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ttl
integer min: 60 -
Time-to-live (TTL) in seconds for generated content. Only applies when
outputTypeisURL.
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includeCost
boolean default: false -
Include task cost in the response.
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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.
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acceleratorOptions
object -
Advanced caching mechanisms to speed up generation.
Properties 10 properties
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acceleratorOptions»cacheEndStepcacheEndStep
integer min: 1 -
Absolute step number to end caching. Must be greater than
cacheStartStepand less than or equal tosteps.
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acceleratorOptions»cacheEndStepPercentagecacheEndStepPercentage
integer min: 1 max: 100 -
Percentage of steps to end caching. Alternative to
cacheEndStep. Must be greater thancacheStartStepPercentage.
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acceleratorOptions»cacheMaxConsecutiveStepscacheMaxConsecutiveSteps
integer min: 1 max: 5 default: 3 -
Limits the maximum number of consecutive steps that can use cached computations before forcing a fresh computation.
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acceleratorOptions»cacheStartStepcacheStartStep
integer min: 0 -
Absolute step number to start caching. Must be less than
cacheEndStep.
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acceleratorOptions»cacheStartStepPercentagecacheStartStepPercentage
integer min: 0 max: 99 -
Percentage of steps to start caching. Alternative to
cacheStartStep. Must be less thancacheEndStepPercentage.
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acceleratorOptions»teaCacheteaCache
boolean default: false -
TeaCache acceleration for transformer-based models. Estimates step differences to skip redundant computations.
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acceleratorOptions»teaCacheDistanceteaCacheDistance
float min: 0 max: 1 step: 0.01 default: 0.5 -
Controls the aggressiveness of the TeaCache feature. Lower values prioritize quality, higher values prioritize speed.
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acceleratorOptions»deepCachedeepCache
boolean -
DeepCache acceleration. Skips transformer computations in certain steps to speed up generation.
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acceleratorOptions»deepCacheIntervaldeepCacheInterval
integer min: 1 -
Interval for DeepCache acceleration. A value of 2 skips every other step, 3 skips two out of three, etc.
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acceleratorOptions»deepCacheBranchIddeepCacheBranchId
integer min: 0 -
Branch ID for DeepCache acceleration. Determines which U-Net layers are skipped.
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Inputs
Input resources for the task (images, audio, etc). These must be nested inside the inputs object.
inputs object.-
inputs»seedImageseedImage
string -
Image used as a starting point for the generation (UUID, URL, Data URI, or Base64).
Learn more 3 resources
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inputs»maskImagemaskImage
string -
Image used to specify which areas of the seed image should be edited (UUID, URL, Data URI, or Base64).
Learn more 1 resource
Core Parameters
Primary parameters that define the task output.
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model
string required value: civitai:101055@128078 -
Identifier of the model to use for generation.
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positivePrompt
string required min: 2 max: 3000 -
Text prompt describing elements to include in the generated output.
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negativePrompt
string min: 2 max: 3000 -
Prompt to guide what to exclude from generation. Ignored when guidance is disabled (CFGScale ≤ 1).
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width
integer required min: 128 max: 2048 step: 8 default: 1024 -
Width of the generated media in pixels.
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height
integer required min: 128 max: 2048 step: 8 default: 1024 -
Height of the generated media in pixels.
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seed
integer min: 0 max: 9223372036854776000 -
Random seed for reproducible generation. When not provided, a random seed is generated in the unsigned 32-bit range.
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steps
integer min: 1 max: 50 default: 30 -
Total number of denoising steps. Higher values generally produce more detailed results but take longer.
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scheduler
string -
Scheduler to use for the diffusion process.
Allowed values 75 values
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CFGScale
float min: 0 max: 30 step: 0.01 -
Guidance scale representing how closely the output will resemble the prompt. Higher values produce results more aligned with the prompt.
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strength
float min: 0 max: 1 step: 0.01 default: 0.8 -
Strength of the transformation. Lower values result in more influence from the original input.
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maskMargin
integer min: 32 max: 128 -
Extra context pixels around the masked region during inpainting. The model zooms into the masked area with these additional pixels for better integration.
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clipSkip
integer min: 0 max: 4 -
Number of layers to skip in the CLIP model.
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promptWeighting
string -
Syntax used for prompt weighting.
Allowed values 2 values
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outpaint
object -
Pixel extensions for each boundary direction of the source image.
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lora
array of objects min items: 1 -
Configuration for Low-Rank Adaptation models.
Properties 3 properties
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lora»modelmodel
string required -
LoRA model identifier.
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lora»weightweight
float min: -4 max: 4 step: 0.01 default: 1 -
Strength of the LoRA influence. A value of 0 means no influence. Higher values increase the influence, and negative values can be used to steer away from the LoRA's style.
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lora»transformertransformer
string default: both -
Transformer stages to apply LoRA. Some video models use separate high-noise and low-noise processing stages, and LoRAs can be selectively applied to optimize their effectiveness.
Allowed values 3 values
- Apply LoRA only to the high-noise processing stage (coarse structure and early generation steps).
- Apply LoRA only to the low-noise processing stage (fine details and later generation steps).
- Apply LoRA to both stages for full coverage.
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controlNet
array of objects min items: 1 -
Configuration for identifying and applying ControlNet models.
Properties 8 properties
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controlNet»modelmodel
string required -
ControlNet model identifier.
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controlNet»weightweight
float min: -4 max: 4 step: 0.01 default: 1 -
Strength of the ControlNet influence. A value of 0 means no influence. Higher values increase the influence, and negative values can be used to steer away from the guide image.
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controlNet»guideImageguideImage
string required -
Reference image for ControlNet guidance (UUID, URL, Data URI, or Base64).
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controlNet»controlModecontrolMode
string default: balanced -
ControlNet guidance mode.
Allowed values 3 values
- Equal weight between ControlNet and prompt.
- Prioritize ControlNet guidance.
- Prioritize prompt guidance.
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controlNet»endStependStep
integer min: 1 -
Absolute step number to end ControlNet influence. Must be greater than
startStepand less than or equal tosteps.
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controlNet»endStepPercentageendStepPercentage
integer min: 1 max: 100 -
Percentage of steps to end ControlNet influence. Must be greater than
startStepPercentage.
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controlNet»startStepstartStep
integer min: 0 -
Absolute step number to start ControlNet influence. Must be less than
endStep.
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controlNet»startStepPercentagestartStepPercentage
integer min: 0 max: 99 -
Percentage of steps to start ControlNet influence. Must be less than
endStepPercentage.
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ipAdapters
array of objects min items: 1 -
Configuration for IP-Adapter image-prompted generation.
Properties 7 properties
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ipAdapters»modelmodel
string required -
IP-Adapter model identifier.
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ipAdapters»weightweight
float min: -4 max: 4 step: 0.01 default: 1 -
Strength of the IP-Adapter influence. A value of 0 means no influence. Higher values increase the influence, and negative values can be used to steer away from the reference.
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ipAdapters»guideImagesguideImages
array of strings required min items: 1 -
Images to guide the IP-Adapter (UUID, URL, Data URI, or Base64).
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ipAdapters»combineMethodcombineMethod
string default: concat -
Controls how multiple reference images are combined.
Allowed values 5 values
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ipAdapters»embedScalingembedScaling
string default: kv -
Determines which embedding components are used and their strength.
Allowed values 4 values
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ipAdapters»weightTypeweightType
string default: normal -
Shapes how influence evolves during generation.
Allowed values 13 values
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ipAdapters»weightCompositionweightComposition
float min: 0 max: 1 step: 0.01 -
Controls composition/layout influence specifically.
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Features
Standalone addons and post-processing features.
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ultralytics
object -
Configuration object for Ultralytics face enhancement during generation. This feature uses face detection and inpainting to improve facial details in the same generation step, without requiring post-processing.
Face enhancement is available for Stable Diffusion 1.X, SDXL, and FLUX models. The system automatically detects faces and applies targeted refinement to improve quality while maintaining consistency with the overall generation.
Properties 8 properties
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ultralytics»CFGScaleCFGScale
float min: 0 max: 50 step: 0.1 default: 8 -
Face refinement guidance scale.
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ultralytics»confidenceconfidence
float min: 0 max: 1 step: 0.01 default: 0.9 -
Confidence threshold for detection.
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ultralytics»maskBlurmaskBlur
integer min: 0 max: 100 default: 5 -
Mask feathering amount. Higher values create softer transitions between the enhanced face region and surrounding areas.
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ultralytics»maskPaddingmaskPadding
integer min: 0 max: 20 default: 5 -
Padding around detected face in pixels. Expands the refinement area to include surrounding context like hair and neck.
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ultralytics»negativePromptnegativePrompt
string -
Negative prompt for detection.
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ultralytics»positivePromptpositivePrompt
string -
Positive prompt for detection.
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ultralytics»stepssteps
integer min: 1 max: 100 default: 20 -
Number of face refinement steps.
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ultralytics»strengthstrength
float min: 0 max: 1 step: 0.01 default: 0.3 -
Refinement strength. Lower values preserve more of the original, higher values allow more aggressive reconstruction.
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hiresFix
boolean | object -
Two-stage generation for improved resolution and detail. The model generates at a lower resolution first, then upscales and refines the result in a second pass. Can be enabled with
truefor default settings, or configured as an object for fine-grained control over the upscaling model, steps, and strength.When using the object form, the
modelparameter is required. Available upscaling models:Model Name Upscale Factor runware:504@1RealESRGAN_x4plus 4x runware:realesrgan@anime-6bRealESRGAN_x4plus_anime_6B 4x runware:esrgan@animesharp4x-AnimeSharp 4x runware:esrgan@ultrasharp4x-UltraSharp 4x "hiresFix": true"hiresFix": { "model": "runware:esrgan@ultrasharp", "steps": 15, "strength": 0.6 }Allowed values 1 value
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photoMaker
object -
PhotoMaker enables personalized image generation while preserving the identity of a subject from reference images. Provide one or more photos of a person, and the model will generate new images that maintain their facial characteristics, expression tendencies, and overall identity across different styles and compositions.
Reference images must each contain a single, clear face. Up to 4 reference images can be provided for stronger identity preservation.
Examples 1 example
"photoMaker": { "images": ["59a2edc2-45e6-429f-be5f-7ded59b92046"], "strength": 20, "style": "Cinematic" }Properties 3 properties
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photoMaker»imagesimages
array of strings required min items: 1max items: 4 -
Reference images for subject identity preservation. Each image must contain a single, clear face of the subject (UUID, URL, Data URI, or Base64).
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photoMaker»strengthstrength
integer min: 15 max: 50 default: 15 -
Controls the balance between preserving the subject's original features and the creative transformation specified in the prompt. Lower values provide stronger subject fidelity, higher values allow more creative freedom.
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photoMaker»stylestyle
string default: No style -
Artistic style applied to the generated images.
Allowed values 11 values
- Maximizes subject fidelity while allowing creative freedom in the composition.
- Applies a movie-like aesthetic.
- Transforms the subject into a Disney-inspired character.
- Creates a digital artwork style.
- Enhances photographic qualities.
- Applies fantasy-themed artistic elements.
- Creates a neon-colored cyberpunk aesthetic.
- Improves overall image quality.
- Transforms the subject into comic book style.
- Creates a low-polygon geometric style.
- Converts the image into line drawing style.
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