falImage to imageComing soon

blackforestlabs/flux-3/klein/edit-image

Name: blackforestlabs/flux-3/klein/edit-image
Brand: fal

blackforestlabs/flux-3/klein/edit-image is an image to image tool from fal that runs in the background and returns images. Coming soon: listed with its price, not yet open to runs.

This tool is listed but not yet available to run.

Priced by usage

Pricing

$0.0117 per megapixel. Each image_size preset counts as 1 MP, and a custom width × height rounds up to whole megapixels. Billed on num_images, default 1. The final charge comes from usage.

Limits

Runs: In the background
Returns: image
Longest queue wait: 3600s
Run deadline: 1800s
Largest inline input: 1024 KB
Largest input file: 500 MB
Largest output: 4768 MB
Outputs per run: 16

Input

Field	Kind	Default	Description
`prompt` required	text	—	A complete caption of the target image with the edit folded in. Refer to the references by their order: the first image, the second image.
`enable_prompt_expansion`	true or false	true	If set to true, the prompt is expanded into a detailed caption (grounded in the reference images when editing) before generation.
`seed`	number (whole)	—	The same seed and the same prompt given to the same version of the model will output the same image every time.
`num_images`	number (whole) 1 to 4	1	The number of images to generate.
`output_format`	one of jpeg, png, webp	png	The format of the generated image.
`image_urls` required	URLs or files	—	The reference images to edit or compose from (up to 10).
`image_size`	JSON	—	The size of the generated image, 256 to 4096 pixels per side. If not set, a single reference image's own size (scaled to at most 4 megapixels) is used, or the first reference image's size (at most 1 megapixel) when several are given.
`bounding_boxes`	JSON	—	Optional layout, with (0, 0) at the top-left of each image: keep, move, resize or remove objects from the references, or place new ones. Name boxes in the prompt by label, e.g. `<dragon>`.

Same request in code

curl https://api.spiral.ai/v1/runs \
  -H "Authorization: Bearer $SPIRAL_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
    "provider": "fal",
    "model": "blackforestlabs/flux-3/klein/edit-image",
    "input": {
      "prompt": "A miniature grey amigurumi knight figure crocheted from thick woolen yarn stands on a cliff of stacked yarn skeins at night, lit by a full moon, next to a large…",
      "image_urls": [
        "<image_urls>"
      ]
    }
  }'