Flux Kontext

What it is

An internal block that performs text-based image editing using BlackForest Labs' Flux Kontext models.

What it does

Takes a prompt describing the desired transformation and optionally a reference image, then returns a new image URL.

How it works

The block sends your prompt, image, and settings to the selected Flux Kontext model on Replicate. The service processes the request and returns a link to the edited image.

Inputs

Input	Description
Credentials	Replicate API key with permissions for Flux Kontext models
Prompt	Text instruction describing the desired edit
Input Image	(Optional) Reference image URI (jpeg, png, gif, webp)
Aspect Ratio	Aspect ratio of the generated image (e.g. match_input_image, 1:1, 16:9, etc.)
Seed	(Optional, advanced) Random seed for reproducible generation
Model	Model variant to use: Flux Kontext Pro or Flux Kontext Max

Outputs

Output	Description
image_url	URL of the transformed image
error	Error message if generation failed

Use Cases

• Enhance a marketing image by requesting "add soft lighting and a subtle vignette" while providing the original asset as the reference image.

• Generate social media assets with specific aspect ratios and style prompts.

• Apply creative edits to product photos using text instructions.