Appearance

FLUX.1 [dev] Fill with LoRAs

POST/v1/run

Flux Lora Fill by BFL - AI-powered image editing, style transfer, and transformation. Edit photos with natural language instructions, remove backgrounds, change styles, and enhance images effortlessly.

Request body

Submit an async generation request. The model field selects the model; other fields are model-specific input parameters.

stringmodelrequired

Model identifier. Set to bfl/flux-lora-fill.

Default: bfl/flux-lora-fill

stringpromptrequired

The prompt to generate an image from.

Default:

stringimagerequired

URL of image to use for fill operation

Optional<string>mask

The mask to area to Inpaint in.

Optional<number>guidance_scale

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt when looking for a related image to show you.

Range: 28 to 35

Default: 30

Optional<integer>num_inference_steps

The number of inference steps to perform.

Range: 1 to 50

Default: 28

Optional<string>output_format

The format of the generated image.

Allowed values: jpeg, png

Default: jpeg

Optional<boolean>resize_to_original

Resizes the image back to the original size. Use when you wish to preserve the exact image size as the originally provided image.

Default: false

Optional<string>fill_image

Use an image fill input to fill in particular images into the masked area.

Optional<boolean>paste_back

Specifies whether to paste-back the original image onto to the non-inpainted areas of the output

Default: true

Optional<array<object>>loras

The LoRAs to use for the image generation. You can use any number of LoRAs and they will be merged together to generate the final image.

Default:

Optional<string>aspect_ratio

The aspect ratio of the generated image.

Allowed values: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16

Optional<integer>seed

The same seed and the same prompt given to the same version of the model will output the same image every time.

Response Schema

The submit endpoint returns an accepted generation task. Poll the result endpoint with the returned id for terminal outputs or errors.

Optional<string>error

Error message if the task failed. Empty on success.

stringidrequired

Unique identifier for the generation task.

Optional<string>model

Model ID used for the prediction.

Optional<array>outputs

Array of generated content. Empty when status is not completed.

stringstatusrequired

Status of the task: pending, running, completed, failed, or timeout.

Allowed values: pending, running, completed, failed, timeout

Model capabilities

array<string>capability_tagsrequired

Capabilities declared by the model registry.

Default: image-to-image

stringexecution_moderequired

Execution mode declared by the model registry.

Default: async