---
title: "FLUX Pro Fill API & Playground - Comfy"
description: "FLUX Pro Fill by Black Forest Labs: Inpaints an image using a mask region. Run it in your browser or call it via API. Typical cost: 10.6 credits per run."
canonical: https://comfy.org/hub/models/flux-pro-fill/
lang: en
index: https://comfy.org/llms.txt
---

[Back to all models](https://comfy.org/hub/models/)

Black Forest Labs

[Edit images](https://comfy.org/hub/models/?useCase=edit-images)

# FLUX Pro Fill

Inpaints an image using a mask region.

10.6 credits /Run

- [inpaint](https://comfy.org/hub/models/?q=inpaint)
- [edit](https://comfy.org/hub/models/?q=edit)
- [image-edit](https://comfy.org/hub/models/?q=image-edit)

[Read docs](https://docs.comfy.org/development/comfy-router/models#black-forest-labs)

Input

Prompt

Image

- 787 B

Mask image (white edits, black keeps)

- 562 B

Advanced settings

Guidance

Adjust how closely the result follows your prompt.

Output format

Prompt enhancement

Let the model expand or refine your prompt before generation.

Seed

Reuse a seed with the same inputs to make results more repeatable.

Steps

Adjust the number of generation steps. More steps can take longer.

Output

![FLUX Pro Fill: Winged octopus engraved on the pink chrome](https://media.comfy.org/website/workshop/bfl/flux-pro-fill/winged-octopus-engraved-on-the-pink-chrome.png)

Example

## Try an example

- Inside the oval, replace the cherub, its wings, bow and arrow entirely with a single raspberry-pink vintage engraving of an octopus, its eight tentacles curling outward in fine etched cross-hatching, suckers picked out in tiny stippled dots, printed directly onto the flat glossy hot-pink chrome so the surrounding surface stays one continuous mirror with no inset, no border and no dark panel; the sharp white flares and specular highlights keep sliding over the etched lines. The pink chrome slab, the solid sky-blue void, the soft shadow beneath and the lighting stay exactly as they are.

## More from Black Forest Labs

[Browse all Browse all models](https://comfy.org/hub/models/)

- [Black Forest Labs

  ### FLUX Tools Erase

  Image to Image

  bfl flux erase object-removal inpaint edit image-edit](https://comfy.org/hub/models/flux-tools-erase/)
- [Black Forest Labs

  ### FLUX.1 Kontext Max Image Edit

  Image to Image

  bfl flux kontext edit premium image-edit](https://comfy.org/hub/models/flux-1-kontext-max-image-edit/)
- [Black Forest Labs

  ### FLUX.1 Kontext Pro Image Edit

  Image to Image

  bfl flux kontext edit image-edit](https://comfy.org/hub/models/flux-1-kontext-pro-image-edit/)
- [Black Forest Labs

  ### FLUX Pro Expand

  Image to Image

  bfl flux expand outpaint edit image-edit](https://comfy.org/hub/models/flux-pro-expand/)