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FLUX 3 Image to Image: AI Image Editor

Edit and restyle images with FLUX 3, Black Forest Labs' unified multimodal model. Coming soon on Muapi — reserve early access, pay per generation later.

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Overview

About this model

FLUX 3 Image-to-Image lets you edit, restyle, or extend an existing image using a text instruction and one or more reference images. It is built on the same Self-Flow multimodal architecture that powers FLUX 3 Video and FLUX 3 Action, so edits stay physically and stylistically consistent with the source material — subject identity, lighting, and scene geometry are preserved unless the prompt explicitly asks to change them. This positions FLUX 3 Image-to-Image as the natural successor to FLUX Kontext for high-fidelity, instruction-driven image editing once Black Forest Labs opens general access.

1Product Photography: Swap backgrounds or lighting on product shots while preserving the product itself.
2Character Consistency: Re-render a character across scenes while maintaining identity.
3Style Transfer: Apply a new artistic style to an existing photo or illustration.
4Retouching: Make targeted edits to composition, color, or objects without redrawing the whole image.
5Localization: Adapt marketing creative for different regions while keeping the core visual intact.
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Pricing & Value

Cost analysis

muapiTBD at launch

Coming soon — early access via Black Forest Labs, general availability pricing not yet published.

Fal.aiNot available

FLUX 3 is not yet available on Fal.ai.

ReplicateNot available

FLUX 3 is not yet available on Replicate.

* Competitor pricing is estimated based on similar model architectures and usage tiers.

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Technical Details

Configuration schema

Promptstring

Text prompt describing the image. Supports long, richly detailed descriptions.

Default ValueA hyperrealistic portrait of an astronaut standing on red Martian dunes at golden hour, dust particles catching the light, ultra-detailed suit reflections, cinematic depth of field.
Image URLsarray

Reference image(s) to edit or use as visual guidance.

Default Valuehttps://d3adwkbyhxyrtq.cloudfront.net/ai-images/186/712345784292/4a8c5c70-abcc-4920-873e-b0e219986453.jpg
Aspect RatioEnum (8 options)

Aspect ratio of the output image.

Default Value1:1
ResolutionEnum (3 options)

Target resolution of the generated image.

Default Value2k
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Implementation Guide

Developer documentation

How to Use FLUX 3 Image-to-Image (Early Access)

  1. Upload reference image(s) — supply up to 4 images via images_list.

  2. Write an edit instruction — describe exactly what should change, e.g. "replace the background with a sunset beach, keep the subject unchanged."

  3. Set output parameters — choose aspect_ratio and resolution.

  4. Submit the request once live:

curl -X POST https://api.muapi.ai/api/v1/flux-3-image-to-image \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"prompt": "Replace the background with a neon-lit city street at night", "images_list": ["https://example.com/input.jpg"], "aspect_ratio": "1:1"}'
  1. Poll /api/v1/predictions/{id}/result until completed, then download the edited image.
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Common Questions

Frequently asked

What is FLUX 3 Image-to-Image?

It's Black Forest Labs' instruction-driven image editing mode within the FLUX 3 family, letting you supply reference images plus a text prompt to restyle, extend, or edit an existing image while preserving subject identity.

Is FLUX 3 Image-to-Image live yet?

FLUX 3 Image is rolling out in the coming weeks per Black Forest Labs' announcement. Muapi will enable this endpoint as soon as general API access is available.

How many reference images can I use?

The planned endpoint supports up to 4 reference images per request, similar to FLUX Kontext's multi-image editing support.

How does this compare to FLUX Kontext?

FLUX Kontext is Black Forest Labs' current-generation image editor. FLUX 3 Image-to-Image is its successor, built on a unified image/video/audio architecture for improved coherence and physical plausibility.

Will pricing be similar to FLUX Kontext Pro?

Black Forest Labs has not published FLUX 3 pricing yet. Muapi will update this page with confirmed per-generation pricing as soon as it is announced.

Can I use FLUX 3 Image-to-Image for character consistency across scenes?

Yes — that is one of its primary intended use cases, using reference images to keep a character's appearance stable while changing scene, pose, or style.