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Black Forest Labs
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FLUX.2 [klein] 4B

AI Image Editing Model

All Text to Image Image Edit
Image $ · 0.1¢

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

How FLUX.2 [klein] 4B performs

Rankings based on human votes in the Lumenfall Arena, where real users pick their favorite without knowing which model made which image.

All categories

FLUX.2 [klein] 4B competes across 5 categories in the arena

Photorealism

Image Editing
Ranked #18 of 28 models · 80.0% win rate Leaderboard
FLUX.2 [klein] 4B
Before After
Bald man challenge
Before After
Golden Hour Stroll
Before After

FLUX.2 [klein] 4B #18

Bald man challenge · Photorealism
Before After

FLUX.2 [klein] 4B #18

Golden Hour Stroll · Photorealism
FLUX.2 [klein] 4B — Photorealism

FLUX.2 [klein] 4B #18

Man and Car in California · Photorealism
FLUX.2 [klein] 4B — Photorealism

FLUX.2 [klein] 4B #18

Outfit Transfer Challenge · Photorealism
Same prompt, other models
Before After
#1 Nano Banana... ranks higher
Before After
#8 Seedream 4.5 ranks higher
Before After
#22 Wan 2.5 (Pr... ranks lower
Before After
#28 Bria FIBO ranks lower
Before After
#1 Nano Banana... ranks higher
Before After
#8 Seedream 4.5 ranks higher
Before After
#22 Wan 2.5 (Pr... ranks lower
Before After
#28 Bria FIBO ranks lower
Before After

Nano Banana Pro #1

Bald man challenge · Photorealism
Before After

Seedream 4.5 #8

Bald man challenge · Photorealism
Before After

Wan 2.5 (Preview) #22

Bald man challenge · Photorealism
Before After

Bria FIBO #28

Bald man challenge · Photorealism
Before After

Nano Banana Pro #1

Golden Hour Stroll · Photorealism
Before After

Seedream 4.5 #8

Golden Hour Stroll · Photorealism
Before After

Wan 2.5 (Preview) #22

Golden Hour Stroll · Photorealism
Before After

Bria FIBO #28

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

Lighting, Shadows & Materials

Image Editing
Ranked #20 of 30 models · 66.7% win rate Leaderboard
FLUX.2 [klein] 4B
Before After
Bald man challenge
Before After
Golden Hour Stroll
FLUX.2 [klein] 4B — Lighting, Shadows & Materials

FLUX.2 [klein] 4B #20

Pose & Character Mashup · Lighting, Shadows & Materials
FLUX.2 [klein] 4B — Lighting, Shadows & Materials

FLUX.2 [klein] 4B #20

Outfit Transfer Challenge · Lighting, Shadows & Materials
Before After

FLUX.2 [klein] 4B #20

Bald man challenge · Lighting, Shadows & Materials
Before After

FLUX.2 [klein] 4B #20

Golden Hour Stroll · Lighting, Shadows & Materials
Same prompt, other models
Before After
#1 Nano Banana... ranks higher
Before After
#23 Vidu Q2 ranks lower
Nano Banana Pro — Lighting, Shadows & Materials

Nano Banana Pro #1

Pose & Character Mashup · Lighting, Shadows & Materials
GPT Image 2 — Lighting, Shadows & Materials

GPT Image 2 #8

Pose & Character Mashup · Lighting, Shadows & Materials
Vidu Q2 — Lighting, Shadows & Materials

Vidu Q2 #23

Pose & Character Mashup · Lighting, Shadows & Materials
Nano Banana Pro — Lighting, Shadows & Materials

Nano Banana Pro #1

Outfit Transfer Challenge · Lighting, Shadows & Materials
GPT Image 2 — Lighting, Shadows & Materials

GPT Image 2 #8

Outfit Transfer Challenge · Lighting, Shadows & Materials
Vidu Q2 — Lighting, Shadows & Materials

Vidu Q2 #23

Outfit Transfer Challenge · Lighting, Shadows & Materials
Before After

Nano Banana Pro #1

Bald man challenge · Lighting, Shadows & Materials
Before After

Vidu Q2 #23

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

Preservation

Image Editing
Ranked #25 of 33 models · 55.6% win rate Leaderboard
FLUX.2 [klein] 4B
Before After
Bald man challenge
Before After
Golden Hour Stroll
Before After

FLUX.2 [klein] 4B #25

Bald man challenge · Preservation
FLUX.2 [klein] 4B — Preservation

FLUX.2 [klein] 4B #25

Over-the-top cartoon caricature · Preservation
FLUX.2 [klein] 4B — Preservation

FLUX.2 [klein] 4B #25

Studio Ghibli Anime Style · Preservation
Before After

FLUX.2 [klein] 4B #25

Golden Hour Stroll · Preservation
Same prompt, other models
Before After
#1 Nano Banana... ranks higher
Before After
#9 Seedream 4.5 ranks higher
Before After
#33 Bria FIBO ranks lower
Before After

Nano Banana Pro #1

Bald man challenge · Preservation
Before After

Seedream 4.5 #9

Bald man challenge · Preservation
Before After

Bria FIBO #33

Bald man challenge · Preservation
Nano Banana Pro — Preservation

Nano Banana Pro #1

Over-the-top cartoon caricature · Preservation
Seedream 4.5 — Preservation

Seedream 4.5 #9

Over-the-top cartoon caricature · Preservation
Bria FIBO — Preservation

Bria FIBO #33

Over-the-top cartoon caricature · Preservation
Nano Banana Pro — Preservation

Nano Banana Pro #1

Studio Ghibli Anime Style · Preservation
Seedream 4.5 — Preservation

Seedream 4.5 #9

Studio Ghibli Anime Style · Preservation
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

Prompt Adherence

Image Editing
Ranked #23 of 24 models · 50.0% win rate Leaderboard
FLUX.2 [klein] 4B
FLUX.2 [klein] 4B — Prompt Adherence

FLUX.2 [klein] 4B #23

Pose & Character Mashup · Prompt Adherence
FLUX.2 [klein] 4B — Prompt Adherence

FLUX.2 [klein] 4B #23

Outfit Transfer Challenge · Prompt Adherence
FLUX.2 [klein] 4B — Prompt Adherence

FLUX.2 [klein] 4B #23

Over-the-top cartoon caricature · Prompt Adherence
Same prompt, other models
GPT Image 1.5 — Prompt Adherence

GPT Image 1.5 #1

Pose & Character Mashup · Prompt Adherence
FLUX.2 [klein] 9B — Prompt Adherence

FLUX.2 [klein] 9B #7

Pose & Character Mashup · Prompt Adherence
FLUX.2 [dev] Flash — Prompt Adherence

FLUX.2 [dev] Flash #19

Pose & Character Mashup · Prompt Adherence
FLUX.2 [dev] Turbo — Prompt Adherence

FLUX.2 [dev] Turbo #24

Pose & Character Mashup · Prompt Adherence
GPT Image 1.5 — Prompt Adherence

GPT Image 1.5 #1

Outfit Transfer Challenge · Prompt Adherence
FLUX.2 [klein] 9B — Prompt Adherence

FLUX.2 [klein] 9B #7

Outfit Transfer Challenge · Prompt Adherence
FLUX.2 [dev] Flash — Prompt Adherence

FLUX.2 [dev] Flash #19

Outfit Transfer Challenge · Prompt Adherence
FLUX.2 [dev] Turbo — Prompt Adherence

FLUX.2 [dev] Turbo #24

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

Aesthetics

Image Editing
Ranked #17 of 17 models · 50.0% win rate Leaderboard
FLUX.2 [klein] 4B
Before After
Golden Hour Stroll
FLUX.2 [klein] 4B — Aesthetics

FLUX.2 [klein] 4B #17

Studio Ghibli Anime Style · Aesthetics
Before After

FLUX.2 [klein] 4B #17

Golden Hour Stroll · Aesthetics
FLUX.2 [klein] 4B — Aesthetics

FLUX.2 [klein] 4B #17

Man and Car in California · Aesthetics
Same prompt, other models
Before After
#1 Nano Banana... ranks higher
Before After
#5 Nano Banana 2 ranks higher
Before After
#13 Reve Image 1.0 ranks higher
Nano Banana Pro — Aesthetics

Nano Banana Pro #1

Studio Ghibli Anime Style · Aesthetics
Nano Banana 2 — Aesthetics

Nano Banana 2 #5

Studio Ghibli Anime Style · Aesthetics
Reve Image 1.0 — Aesthetics

Reve Image 1.0 #13

Studio Ghibli Anime Style · Aesthetics
Before After

Nano Banana Pro #1

Golden Hour Stroll · Aesthetics
Before After

Nano Banana 2 #5

Golden Hour Stroll · Aesthetics
Before After

Reve Image 1.0 #13

Golden Hour Stroll · Aesthetics
Nano Banana Pro — Aesthetics

Nano Banana Pro #1

Man and Car in California · Aesthetics
Nano Banana 2 — Aesthetics

Nano Banana 2 #5

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

Book a Meeting

Schedule a call with the Lumenfall team