FLUX.3 Image Klein Base
Black Forest Labs FLUX.3 Image Klein Base 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. Apply up to three FLUX.3 Klein-compatible .safetensors LoRAs with strengths from 0 to 4. LoRA requests use separate size-based pricing. Five square output sizes from 768px to 4K.
Added Oct 15, 2026
Details
- Approx. Price
- $0.027 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
Layout boxes (JSON)
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>.
LoRA 1 Scale
Default
1
Adapter strength from 0 to 4; default 1.
LoRA 1 URL
Default
N/A
Optional direct URL to a FLUX.3 Klein-compatible .safetensors adapter. Other FLUX versions are incompatible. Adding a LoRA changes the image price.
LoRA 2 Scale
Default
1
Adapter strength from 0 to 4; default 1.
LoRA 2 URL
Default
N/A
Optional direct URL to a FLUX.3 Klein-compatible .safetensors adapter. Other FLUX versions are incompatible. Adding a LoRA changes the image price.
LoRA 3 Scale
Default
1
Adapter strength from 0 to 4; default 1.
LoRA 3 URL
Default
N/A
Optional direct URL to a FLUX.3 Klein-compatible .safetensors adapter. Other FLUX versions are incompatible. Adding a LoRA changes the image price.
Number of Images
Default
1
Output format
Default
png
Options (3)
PNG, JPEG, WEBP
Showing 9 of 13 settings.
Benchmarks
No public benchmark scores for this model yet.
Examples
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