Black Forest Labs' open-weights image generation model with frontier performance, available for non-commercial local deployment
Settled by community votes across 3 shared challenges, with an AI judge weighing in on each.
FLUX.2 [dev]
24.5
arena score
#17 of 44 in Text-to-Image
Skill signature
Not enough comparable category data
The chart appears once both models have ratings across at least three shared arena categories.
FLUX.2 [flex]
25.2
arena score
#13 of 44 in Text-to-Image
Vote tally
Where the votes landed
FLUX.2 [dev]
0.0%
win rate
Ties
0.0%
FLUX.2 [flex]
100.0%
win rate
0.0%
0.0% ties
100.0%
Shared challenges
3
Challenge by challenge
The strongest take from each model on every shared challenge, with the AI judge's read.
Geometric Composition
Text-to-Image“A glass cube on a wooden table. Inside the cube is a small blue sphere. On top of the cube sits a red book. A green plant is behind the cube, partially visible through the glass. Soft window light from the left.”
FLUX.2 [dev]
FLUX.2 [flex]
AI Judge Analysis
FLUX.2 [dev]
- + Excellent realistic lighting and caustic reflections from the glass.
- + The plant is correctly positioned behind the cube with realistic distortion through the glass.
- + High level of textural detail on the wooden table and book cover.
- − The blue sphere appears to be floating rather than resting on the bottom of the cube.
- − The book doesn't sit quite flat on the glass block's rounded edges.
FLUX.2 [flex]
- + Perfect geometric composition with sharp, clean lines for the cube and book.
- + The blue sphere is firmly grounded on the base of the cube.
- + Clean, minimalist aesthetic with very balanced framing.
- − The background plant feels slightly disconnected from the glass and lacks realistic refraction.
- − The lighting is a bit more flat and CG-like compared to the warmth of the other image.
Verdict: Both models followed the complex spatial instructions perfectly. FLUX.2 [dev] produced a more photographic and atmospheric result with superior light interaction, while FLUX.2 [flex] delivered a cleaner, more precise geometric render. FLUX.2 [dev] is the slightly better image due to the realistic treatment of the window light and the way the plant is seen through the glass.
Candid Street Photography
Text-to-Image“A candid street photo of an elderly Japanese man repairing a red bicycle in light rain, reflections on wet pavement, shallow depth of field, 50mm lens, natural skin texture, imperfect framing, motion blur from passing cars, cinematic but realistic, no stylization.”
FLUX.2 [dev]
FLUX.2 [flex]
0% wins
0% ties
100% wins
AI Judge Analysis
FLUX.2 [dev]
- + Excellent depiction of motion blur with passing cars.
- + Highly realistic, natural skin texture and clothing folds.
- + Detailed and accurate interpretation of 'light rain' and wet pavement reflections.
- − The bicycle structure is physically impossible and cluttered with random wires and parts.
- − The man's posture appears a bit detached from the bike frame.
FLUX.2 [flex]
- + Stronger composition with a clear focal point and nice bokeh.
- + The bicycle is much more coherent and recognizable as a real vehicle.
- + Good use of 'imperfect framing' with the foreground pillar.
- − The motion blur of the cars is less pronounced than requested.
- − The man's hands are slightly merged with the bicycle chain area.
Verdict: FLUX.2 [dev] captures the 'candid street' and 'motion blur' aspects of the prompt more effectively, but fails significantly on the anatomy of the bicycle. FLUX.2 [flex] provides a more aesthetically pleasing and coherent image with a much better-rendered bicycle and realistic lighting, though the motion blur is subtler. FLUX.2 [flex] is the preferred choice for its overall technical coherence and superior composition.
Adorable Baby Animals in Sunny Meadow
Text-to-Image“Hyper-photorealistic scene of fluffy baby animals—a golden retriever puppy, tabby kitten, baby bunny, and red fox kit—with big expressive eyes and ultra-detailed soft fur, playfully chasing butterflies and tumbling together in a lush wildflower meadow, warm golden sunrise light with god rays and dew sparkles, joyful wholesome vibe, 8K masterpiece.”
FLUX.2 [dev]
FLUX.2 [flex]
AI Judge Analysis
FLUX.2 [dev]
- + Excellent fur rendering with realistic texture and lighting interaction.
- + Beautifully soft, diffused golden hour lighting with realistic lens flares.
- + Vibrant wildflower detail in the foreground.
- − The animals are mostly sitting rather than 'playfully chasing' as requested.
- − Included an extra baby bunny that wasn't explicitly requested.
FLUX.2 [flex]
- + Perfect adherence to the 'playfully chasing' and 'tumbling' part of the prompt with dynamic poses.
- + Strong execution of 'god rays' through the trees in the background.
- + Better overall composition that feels more active and joyful.
- − The kitten's front paws look slightly awkward/unformed in mid-air.
- − The butterfly wings have somewhat simplified, repetitive patterns.
Verdict: Both models followed the prompt well, but FLUX.2 [flex] captured the dynamic 'joyful' and 'chasing' elements much better than FLUX.2 [dev], which produced a more static, portrait-like image. While FLUX.2 [dev] has slightly more realistic fur textures, FLUX.2 [flex] wins on composition and energy.
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Black Forest Labs' precision image generation model with maximum control, reliable text rendering, and complete creative control supporting up to 4MP output