FLUX.2 [klein] 4B is a compact 4B-parameter text-to-image model from Black Forest Labs that delivers fast generation with quality results. Supports flexible sizing and JPEG, PNG, and WebP outputs.
Added May 18, 2026
Approx. Price
$0.010 per image
Model Type
text-to-image
Settings
Generation controls available for this model.
Images Per Run
Up to 4
Output images
Input Images
Up to 4
Reference/edit images accepted • Route max 30 MB
Output Sizes
Custom Resolution
LoRA 1 Scale
Default
1
Strength of the first LoRA (0.0 to 4.0).
LoRA 1 URL
Default
N/A
Path to the first LoRA model (e.g., owner/model-name or .safetensors URL).
LoRA 2 Scale
Default
1
Strength of the second LoRA (0.0 to 4.0).
LoRA 2 URL
Default
N/A
Path to the second LoRA model (optional).
LoRA 3 Scale
Default
1
Strength of the third LoRA (0.0 to 4.0).
LoRA 3 URL
Default
N/A
Path to the third LoRA model (optional).
Number of Images
Default
1
Resolution
Default
1024*1024
Options (6)
1024*1024 (Square (1024x1024)), 1280*720 (Landscape (1280x720)), 720*1280 (Portrait (720x1280)), 1536*1024 (Wide (1536x1024)) +2 more
Showing 9 of 10 settings.
Benchmarks
Benchmarks
Human preference benchmarks sourced from Artificial Analysis.
Text to Image
#92 / 148
ELO
1064.0
Appearances
6,280
95% CI
-8/8
Image Editing
#49 / 68
ELO
1120.0
Appearances
6,810
95% CI
-8/8
Release Date 2026-01 · Matched as FLUX.2 [klein] 4B
Artificial Analysis APIExamples
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