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Flux 2 Pro

POST/v1/run

Flux 2 Pro Outpaint is BFL's intelligent image editing model. Transform, retouch, and reimagine existing images using text prompts - from background replacement to artistic style conversion.

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-2-pro/outpaint.

Default: bfl/flux-2-pro/outpaint

stringimagerequired

The image URL to expand using outpainting.

Optional<string>output_format

The format of the generated image.

Allowed values: jpeg, png

Default: jpeg

Optional<boolean>auto_crop

Whether to automatically crop the reference image when the expanded canvas does not fully contain it.

Default: false

Optional<integer>expand_bottom

Pixels to expand at the bottom of the image.

Range: 0 to 2048

Default: 0

Optional<integer>expand_right

Pixels to expand on the right of the image.

Range: 0 to 2048

Default: 0

Optional<integer>expand_left

Pixels to expand on the left of the image.

Range: 0 to 2048

Default: 0

Optional<integer>expand_top

Pixels to expand at the top of the image.

Range: 0 to 2048

Default: 0

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