Black Forest Labs

FLUX.2 [klein] 4B

AI Image Editing Model

Mode:

All Text to Image Image Edit

Image

Black Forest Labs' compact, open-source image generation model with sub-second inference, optimized for production and near real-time applications with multi-reference support

What FLUX.2 [klein] 4B is good at

Rankings based on human votes in the Lumenfall Arena, where real users pick their favorite without knowing which model made which image. Excels at #23 Art (Text-to-Image) , placing in the top 39% of all competing models.

FLUX.2 [klein] 4B Strengths

FLUX.2 [klein] 4B outperforms most competing models here

Art

Text-to-Image

Ranked #23 of 57 models · 50.0% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using The Halloween Invitation The Reversed Rodeo

Other categories

FLUX.2 [klein] 4B competes but doesn't rank as highly

Lighting, Shadows & Materials

Image Editing

Ranked #18 of 36 models · 50.0% win rate Leaderboard

FLUX.2 [klein] 4B

Before After

Bald man challenge

Before After

Golden Hour Stroll

Same prompt, other models

Before After

#1 Nano Banana... ranks higher

Before After

#10 Grok Imagin... ranks higher

Before After

#28 FLUX.1 Kont... ranks lower

Before After

#36 HiDream E1 ranks lower

Before After

#1 Nano Banana... ranks higher

Before After

#10 Grok Imagin... ranks higher

Before After

#28 FLUX.1 Kont... ranks lower

Before After

#36 HiDream E1 ranks lower

Ranked using Bald man challenge Golden Hour Stroll Man and Car in California Outfit Transfer Challenge Pose & Character Mashup

Face & Identity

Image Editing

Ranked #19 of 32 models · 75.0% win rate Leaderboard

FLUX.2 [klein] 4B

Before After

Bald man challenge

Same prompt, other models

Before After

#1 Nano Banana 2 ranks higher

Before After

#9 FLUX.2 [max] ranks higher

Before After

#25 FLUX.2 [dev... ranks lower

Before After

#32 Bria FIBO ranks lower

Ranked using Bald man challenge Over-the-top cartoon carica...

Preservation

Image Editing

Ranked #22 of 37 models · 48.0% win rate Leaderboard

FLUX.2 [klein] 4B

Before After

Bald man challenge

Before After

Golden Hour Stroll

Same prompt, other models

Before After

#1 Nano Banana... ranks higher

Before After

#10 Seedream 5.... ranks higher

Before After

#28 Seedream 4.0 ranks lower

Before After

#37 HiDream E1 ranks lower

Ranked using Bald man challenge Golden Hour Stroll Man and Car in California Outfit Transfer Challenge Over-the-top cartoon carica... Pose & Character Mashup +1 more

Aesthetics

Image Editing

Ranked #21 of 33 models · 36.4% win rate Leaderboard

FLUX.2 [klein] 4B

Before After

Golden Hour Stroll

Same prompt, other models

Before After

#1 Nano Banana... ranks higher

Before After

#9 FLUX.2 [max] ranks higher

Before After

#25 FLUX.2 [dev... ranks lower

Before After

#33 HiDream E1 ranks lower

Ranked using Golden Hour Stroll Man and Car in California Studio Ghibli Anime Style

People & Poses

Image Editing

Ranked #18 of 27 models · 40.0% win rate Leaderboard

FLUX.2 [klein] 4B

Before After

Golden Hour Stroll

Same prompt, other models

Before After

#1 Nano Banana... ranks higher

Before After

#7 FLUX.2 [kle... ranks higher

Before After

#21 FLUX.2 [dev... ranks lower

Before After

#27 HiDream E1 ranks lower

Ranked using Golden Hour Stroll Pose & Character Mashup

Product, Branding & Commercial

Text-to-Image

Ranked #40 of 61 models · 41.0% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using Apollo 11: Journey to Tranq... Chalkboard Menu Magic Burger Explosion: Fie... Modern Clean Menu The Halloween Invitation Vintage Cafe Logo

Photorealism

Image Editing

Ranked #24 of 36 models · 46.2% win rate Leaderboard

FLUX.2 [klein] 4B

Before After

Bald man challenge

Before After

Golden Hour Stroll

Same prompt, other models

Before After

#1 Nano Banana... ranks higher

Before After

#10 Qwen Image ... ranks higher

Before After

#28 Seedream 4.0 ranks lower

Before After

#36 HiDream E1 ranks lower

Before After

#1 Nano Banana... ranks higher

Before After

#10 Qwen Image ... ranks higher

Before After

#28 Seedream 4.0 ranks lower

Before After

#36 HiDream E1 ranks lower

Ranked using Bald man challenge Golden Hour Stroll Man and Car in California Outfit Transfer Challenge

Photorealism

Text-to-Image

Ranked #43 of 62 models · 43.9% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using Adorable Baby Animals in Su... Candid Street Photography Chalkboard Menu Fantasy Warrior Geometric Composition Magic Burger Explosion: Fie... +2 more

Prompt Adherence

Text-to-Image

Ranked #44 of 62 models · 44.4% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using Adorable Baby Animals in Su... Apollo 11: Journey to Tranq... Chalkboard Menu Geometric Composition Isometric Miniature Diorama... Magic Burger Explosion: Fie... +3 more

Adding & Editing Objects

Image Editing

Ranked #21 of 29 models · 50.0% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using Man and Car in California Outfit Transfer Challenge

Prompt Adherence

Image Editing

Ranked #21 of 29 models · 50.0% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using Outfit Transfer Challenge Over-the-top cartoon carica... Pose & Character Mashup

3D Imaging & Modeling

Text-to-Image

Ranked #44 of 61 models · 61.5% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using Geometric Composition Isometric Miniature Diorama...

Text Rendering

Text-to-Image

Ranked #46 of 61 models · 40.0% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using Apollo 11: Journey to Tranq... Chalkboard Menu Isometric Miniature Diorama... Magic Burger Explosion: Fie... Modern Clean Menu The Halloween Invitation +1 more

Aesthetics

Text-to-Image

Ranked #47 of 62 models · 39.7% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using Adorable Baby Animals in Su... Candid Street Photography Fantasy Warrior Geometric Composition Isometric Miniature Diorama... Magic Burger Explosion: Fie... +5 more

Backgrounds & Scenes

Image Editing

Ranked #21 of 26 models · 60.0% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using Man and Car in California

Artistic Restyling

Image Editing

Ranked #23 of 28 models · 40.0% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using Over-the-top cartoon carica... Studio Ghibli Anime Style

Creativity

Image Editing

Ranked #23 of 28 models · 40.0% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using Over-the-top cartoon carica... Studio Ghibli Anime Style

Portraits

Text-to-Image

Ranked #42 of 51 models · 20.0% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using Fantasy Warrior

Cartoon, Anime & Fantasy

Text-to-Image

Ranked #42 of 51 models · 20.0% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using Fantasy Warrior

Creativity

Text-to-Image

Ranked #53 of 62 models · 32.4% win rate Leaderboard

FLUX.2 [klein] 4B

Same prompt, other models

Ranked using Apollo 11: Journey to Tranq... Fantasy Warrior Isometric Miniature Diorama... The Halloween Invitation The Reversed Rodeo Vintage Cafe Logo