black-forest-labs/flux-kontext-dev

Open-weight version of FLUX.1 Kontext

$0.01 / request
GPU: 4xH100

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
$0.0100 / image
or
100 images / $1

For example, generating 100 images should cost around $1.00.

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

ProviderPrice ($)Saving (%)
Synexa$0.0100-
replicate$0.025060.0%
fal$0.025060.0%

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