FLUX.1 Kontext: Game-changer

Today I'm introducing the newest, most powerful image-editing framework: FLUX.1 Kontext. Built by Black Forest Labs, FLUX.1 Kontext is a professional image-to-image model that intelligently understands context and delivers pinpoint editing—no convoluted prompts required. Whether you need object tweaks, style transfers, background swaps, consistent character edits or on-image text adjustments, Kontext has you covered. Its standout strength is deep context awareness coupled with character-consistency maintenance, so essential elements like subject traits and overall composition stay rock-steady across multiple revisions.

Right now, you can access Kontext via two paid API tiers—Pro and Max—and Black Forest Labs has confirmed that an open-source Dev edition is on the horizon.

Plus, ComfyUI already integrates with both paid tiers of the FLUX.1 Kontext API:

• Kontext Pro: tailored for seamless editing, compositing, and image mixing
• Kontext Max: optimized for top-tier typography, prompt fidelity, and blistering speed

Try it online: https://playground.bfl.ai/

Experience FLUX.1 Kontext Image Editing in ComfyUI

FLUX.1 Kontext Image Editing in ComfyUI: Prompt Guidelines & Best Practices

1. Basic Prompts & Notes

• Simple edits

  • Direct:

    “Change the car color to red.”

  • Style-aware:

    “Change to daytime while maintaining the same style of the painting.”

• Style transfer

  • Name the style explicitly:

    “Transform to Bauhaus art style.”

  • Describe key traits:

    “Transform to oil painting with visible brushstrokes and thick paint texture.”

  • Preserve composition:

    “Change to Bauhaus style while maintaining the original composition.”

• Character consistency

  • Be specific:

    “The woman with short black hair,” rather than “her.”

  • Preserve defining features:

    “…while maintaining the same facial features, hairstyle, and expression.”

  • Edit in steps:

  1. Change the background
  2. Adjust the pose or action

• On-image text edits

  • Use quotation marks around the text:

    “Replace ‘joy’ with ‘BFL’.”

  • Maintain formatting:

    “Replace the text while preserving the same font style.”

2. Core Prompting Principles

1. Be Specific Use precise descriptions; avoid vague terms.
2. Step-by-Step Break complex edits into a sequence of simple instructions.
3. State What to Keep Explicitly call out what must remain unchanged.
4. Choose Clear Verbs Prefer “change” or “replace” over generic “convert.”

3. Best-Practice Prompt Templates

• Object Modification

  “Change [object] to [new state], keep [elements to preserve] unchanged.”

• Style Transfer

  “Transform to [specific style], while maintaining [composition/character/other] unchanged.”

• Background Replacement

  “Change the background to [new background], keep the subject in the exact same position and pose.”

• Text Editing

  “Replace ‘[original text]’ with ‘[new text]’, maintain the same font style.”

4. Common Pitfalls & Fixes

• Unwanted Character Changes

  • ❌ “Transform the person into a Viking.”
  • ✅ “Change the clothes to a Viking warrior outfit while preserving facial features.”

• Composition Shifts

  • ❌ “Put him on a beach.”
  • ✅ “Change the background to a beach while keeping the person in the exact same position, scale, and pose.”

• Imprecise Style Application

  • ❌ “Make it a sketch.”
  • ✅ “Convert to pencil sketch with natural graphite lines, cross-hatching, and visible paper texture.”

Follow these guidelines to get the most out of FLUX.1 Kontext’s powerful context-aware, consistency-preserving editing capabilities!