FLUX.3 Image Klein

Black Forest Labs FLUX.3 Image Klein generates images with precise layout, style, and typography, or edits and composes up to ten references. Supports object placement, movement, removal, style transfer, and text editing. Optional labeled bounding boxes control the layout. Five square output sizes from 768px to 4K.

Added Oct 15, 2026

Details

Approx. Price
$0.009 per image
Model type
both

Settings

Generation controls available for this model.

Images Per Run

Up to 4

Output images

Input Images

Up to 10

Reference/edit images accepted • Route max 30 MB

Output Sizes

Square
up to 4,096px

Layout boxes (JSON)

Text

Default

N/A

JSON array of up to 32 objects. Each needs description; optional label and box: {x_min,y_min,x_max,y_max}. Editing also supports source_image_index (zero-based), source_box and target_box. Coordinates are fractions from 0 to 1. Reference labels in the prompt as <label>.

Number of Images

Default

1

Output format

Select

Default

png

Options (3)

PNG, JPEG, WEBP

Prompt expansion

Toggle

Default

Yes

Resolution

Default

1024x1024

Options (5)

768x768, 1024x1024, 1536x1536, 2048x2048 +1 more

Safety checker

Toggle

Default

Yes

Seed

Number

Default

N/A

Benchmarks

No public benchmark scores for this model yet.

Examples

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