black-forest-labs/flux-kontext-dev

Open-weight version of FLUX.1 Kontext

$0.01 / request
GPU: 4xH100

Model Inputs

file

Input image to start generating from

string

Text description of what you want to generate, or the instruction on how to edit the given image.

Result

Idle
Waiting for your input...

Pricing

black-forest-labs/

flux-kontext-dev

Pricing for Synexa AI models works differently from other providers. Instead of being billed by time, you are billed by input and output, making pricing more predictable.

Output
$0.01 / request
or
100 requests / $1

For example, generating 100 requests costs about $1.00.

Check out our docs for more information about how per-request pricing works on Synexa.

ProviderPrice ($)Saving (%)
Synexa$0.01-
replicate$0.02560.0%
fal$0.02560.0%

Readme

FLUX.1 Kontext Dev - Text-Based Image Editing

FLUX.1 Kontext Dev is an open-weight text-based image editing model from Black Forest Labs. It allows you to edit images using natural language text prompts with high-quality results.

What You Can Do

Kontext excels at:

  • Style Transfer: Convert photos to different art styles (watercolor, oil painting, sketches)
  • Object/Clothing Changes: Modify hairstyles, add accessories, change colors
  • Text Editing: Replace text in signs, posters, and labels
  • Background Swapping: Change environments while preserving subjects
  • Character Consistency: Maintain identity across multiple edits

Prompting Best Practices

Be Specific

  • Use clear, detailed language with exact colors and descriptions
  • Avoid vague terms like "make it better"
  • Name subjects directly: "the woman with short black hair" vs. "she"

Preserve Intentionally

  • Specify what should stay the same: "while keeping the same facial features"
  • Use "maintain the original composition" to preserve layout
  • For background changes: "Change the background to a beach while keeping the person in the exact same position"

Text Editing Tips

  • Use quotation marks: "replace 'old text' with 'new text'"
  • Stick to readable fonts
  • Match text length when possible to preserve layout

Style Transfer

  • Be specific about artistic styles: "impressionist painting" not "artistic"
  • Reference known movements: "Renaissance" or "1960s pop art"
  • Describe key traits: "visible brushstrokes, thick paint texture"

Complex Edits

  • Break into smaller steps for better results
  • Start simple and iterate
  • Use descriptive action verbs instead of "transform" for more control

Tips Summary

  • Be specific with colors, styles, and descriptions
  • Start simple and iterate on successful edits
  • Preserve intentionally by stating what to keep unchanged
  • Use quotation marks for exact text replacements
  • Control composition by specifying camera angles and framing
  • Choose verbs carefully - "change" vs "transform" gives different results