falImage to imageComing soon

fal-ai/smart-resize

Name: fal-ai/smart-resize
Brand: fal

fal-ai/smart-resize 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

$0.195 per image. 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
`image_url` required	URL or file	—	The URL of the source image to resize.
`target_sizes` required	list	—	The list of target dimensions to generate, each written as ``<width>x<height>`` (e.g. ``"1920x1080"``). One output image is produced per target size (multiplied by ``num_images_per_size``). The endpoint internally picks the smallest nano-banana-pro preset that fully covers each target so the final image is a pixel-perfect match with no upscaling.
`prompt`	text		Optional extra instruction that is forwarded to nano-banana-pro alongside the auto-generated resize prompt. Leave empty to let the model preserve the original image content as closely as possible.
`num_images_per_size`	number (whole) 1 to 4	1	The number of nano-banana-pro variants to produce for each target size. The response images list will contain ``len(target_sizes) * num_images_per_size`` images in total.
`resolution`	one of 1K, 2K, 4K	1K	Hint for the minimum resolution tier to use internally. The smart-resize algorithm may pick a higher tier automatically when the requested target size is too large for this tier. This field does not affect the final output dimensions — those come from ``target_sizes``.
`output_format`	one of jpeg, png, webp	png	The output image format.
`safety_tolerance`	one of 1, 2, 3, 4, 5, 6	4	The safety tolerance level applied to the inner nano-banana-pro /edit calls. Higher numbers loosen safety filtering.
`seed`	number (whole)	—	Optional random seed forwarded to the inner nano-banana-pro /edit calls for reproducibility. The same seed is used for every target size when set.

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": "fal-ai/smart-resize",
    "input": {
      "image_url": "https://storage.googleapis.com/falserverless/example_inputs/nano-banana-edit-input.png",
      "target_sizes": [
        "<target_sizes>"
      ]
    }
  }'