FLUX.2 [flex] vs Seedream 4.5
Head-to-head across 11 challenges
FLUX.2 [flex]
44.4%
win rate
Ties
5.6%
Seedream 4.5
50.0%
win rate
Challenge Results
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.”
AI Judge Analysis
FLUX.2 [flex]
- + Perfect prompt adherence for all spatial relationships.
- + Realistic soft window lighting and depth of field.
- + Clean rendering of the glass cube and the objects within it.
- − The blue sphere is quite large relative to the cube, pushing the definition of 'small'.
Seedream 4.5
- + Strong sunlight effects and caustics on the wooden table.
- + Tangible textures on the book cover and wood grain.
- − The blue object is heart-shaped or distorted rather than a sphere.
- − Perspective issues where the cube appears to be a solid block rather than a hollow container.
- − The plant is placed inside/behind the glass in a way that creates optical confusion.
Verdict: FLUX.2 [flex] followed every part of the prompt with high precision, accurately placing the blue sphere inside the cube and the plant behind it. Seedream 4.5 struggled with geometric coherence, resulting in a distorted blue object and a cube that looks like a solid glass prism rather than a container.
Man and Car in California
Editing“Make a photo of the man driving the car down the California coastline”
AI Judge Analysis
FLUX.2 [flex]
- + Excellent full preservation of the source car's exterior design and lighting.
- + Convincingly integrated the man from the second source image into the driver's seat.
- + Dynamic motion blur on the road and wheels creates a sense of action.
Seedream 4.5
- + High fidelity in preserving the man's specific clothing, including the plaid coat, scarf, and cargo pants.
- + Captures a more intimate angle that shows the interior details clearly.
- − Major structural failure with the car door opening outwards into the road while 'driving'.
- − The car's proportions and perspective are warped compared to the source image.
Verdict: FLUX.2 [flex] successfully merges the two source images into a cohesive, believable scene with realistic motion and perfect car preservation. Seedream 4.5 does an impressive job maintaining the man's exact wardrobe, but fails the logic of the prompt by showing a car door hanging wide open while driving, which ruins the composition.
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.”
AI Judge Analysis
FLUX.2 [flex]
- + Excellent skin textures and clothing details.
- + Natural-looking bokeh and lighting from background traffic.
- + High level of realism in the environmental wetness and reflections.
- − The bicycle frame geometry is non-functional, with the seat tube missing and the chain floating.
- − The subject is not actively using a tool, just touching the frame.
Seedream 4.5
- + Stronger adherence to the 'motion blur' request with visible light trails.
- + Dynamic interaction with a wrench tool, making the 'repairing' action more clear.
- + Great rain effects and wet pavement reflections.
- − The bicycle chain is physically impossible, passing through the frame and rear rack.
- − The wrench is floating/merging into the man's hand.
- − Lower resolution feel compared to model A.
Verdict: Both models struggle with the complex physics of a bicycle, resulting in mangled chains and frames. FLUX.2 [flex] produces a much more realistic skin texture and overall higher image clarity, while Seedream 4.5 captures the 'motion blur' and 'candid' atmosphere of the prompt more effectively despite significant anatomical and mechanical distortions.
Modern Clean Menu
Text-to-Image“Modern minimalist restaurant menu design, white background with colorful food photos in grid, sections for appetizers/pizza/mains, bold sans-serif fonts, vibrant accents, clean professional layout for casual dining.”
AI Judge Analysis
FLUX.2 [flex]
- + Excellent grid layout with clear categorization
- + High typographic clarity and hierarchy
- + Clean, professional aesthetic suitable for a real menu
- − The text content is largely gibberish/placeholder characters
- − Repeated pizza images in the grid
Seedream 4.5
- + Good color-coded association between sections and images
- + High quality food photography
- + Clean sans-serif fonts
- − Failed the 'grid' requirement by using a single-column list
- − Prices are nonsensical for casual dining (e.g., $99 for 'Manu')
- − Redundant text labels (e.g., repeating the word 'Pizza' multiple times)
Verdict: FLUX.2 [flex] successfully followed the complex layout instructions, producing a professional 2x3 grid of images and a two-column text layout that perfectly fits the 'modern minimalist' prompt. Seedream 4.5 produced high-quality individual food images but failed on the grid structure and provided less realistic pricing and text logic.
Isometric Miniature Diorama Scenes
Text-to-Image“Create a clear, 45° top-down isometric miniature 3D cartoon scene of Japan's signature dish: sushi, with soft refined textures, realistic PBR materials, gentle lighting, on a small raised diorama base with minimal garnish and plate. Solid light blue background. At top-center: 'JAPAN' in large bold text, 'SUSHI' below it, small flag icon. Perfectly centered, ultra-clean, high-clarity, square format.”
AI Judge Analysis
FLUX.2 [flex]
- + Perfect text rendering and layout as requested.
- + Clean, soft-refined textures that match the 3D clay/cartoon aesthetic exactly.
- + High level of clarity with a very professional, minimalist composition.
- − The 45-degree isometric angle is slightly flattened by the lens choice.
- − The white plate blends a bit much with the raised base.
Seedream 4.5
- + Excellent miniature diorama feel with textured base material.
- + Good sushi grain and fish texture rendering.
- + Solid adherence to the isometric perspective.
- − The flag icon is poorly integrated and placed to the side rather than centered.
- − The 'JAPAN' text has a slight artifact/notch in the 'J'.
- − Visible depth of field blurring on the edges of the base reduces the 'ultra-clean' look requested.
Verdict: FLUX.2 [flex] followed the layout instructions perfectly, centering the text and flag icon exactly as described with a very clean, professional finish. Seedream 4.5 captured the 'miniature' feel well with the textured diorama base, but failed to center the flag icon and produced slightly less crisp text and background transition. FLUX.2 [flex] is the winner for superior prompt adherence and overall clarity.
Night Sky Transformation
Editing“Change the scene to night: a deep, dark sky with subtle, glistening stars visible behind the mountain.”
AI Judge Analysis
FLUX.2 [flex]
- + Successfully changed the sky to a deep, dark night with visible stars.
- + Excellent atmospheric lighting, using a halo effect behind the peak to justify the mountain's visibility.
- + Perfectly preserved the village lights and foreground details from the source.
- − The transition between the peak's edge and the glowing sky halo is slightly soft.
Seedream 4.5
- + Preserved the exact geometry and details of the village and terrain perfectly.
- + Accurately added subtle stars to the dark sky.
- − Inconsistent lighting: the sky is dark night, but the mountain peak is still illuminated by a bright orange sunset glow from the source image.
- − Lacks a logical light source for the bright peak given the dark surroundings.
Verdict: FLUX.2 [flex] provides a much more coherent edit by not only changing the sky but also adjusting the mountain's lighting to match a moonlit night, whereas Seedream 4.5 creates a lighting contradiction by keeping the golden-hour sunlight on the peak despite the dark night sky. FLUX.2 [flex] successfully captures the requested mood while maintaining the integrity of the original landscape.
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.”
AI judge analysis unavailable for this challenge.
Heroic Super Hero Portrait
Text-to-Image“Hyper-photorealistic full-body portrait of a female superhero standing triumphantly on a New York skyscraper rooftop at golden sunset, wearing a classic modest superhero costume with flowing cape, chest emblem, gloves, and boots in red and blue colors, practical design, short hair, strong determined heroic expression looking into the distance, powerful confident stance with hands on hips and cape billowing dramatically in the wind, detailed urban cityscape background, warm natural sunlight with sharp shadows and fabric highlights, ultra-sharp textures on suit, hair, and concrete, 8K masterpiece, empowering family-friendly style.”
AI Judge Analysis
FLUX.2 [flex]
- + Excellent adherence to the 'hands on hips' pose and 'short hair' description.
- + Very high level of detail in the costume textures and practical stitching.
- + Superior background clarity and architectural realism in the city skyline.
- − The lighting on the character is a bit flat and doesn't fully capture the 'golden sunset' warmth seen in the sky.
Seedream 4.5
- + Beautiful golden hour lighting that integrates the character perfectly into the environment.
- + Dynamic, cinematic composition with a more dramatic cape flow.
- + Photorealistic skin textures and natural hair movement.
- − The emblem on the chest is an inconsistent variation of the Superman logo rather than a unique design.
- − One hand is partially merged or poorly defined against the hip/cape.
Verdict: FLUX.2 [flex] provides a more technically accurate interpretation of the prompt, specifically regarding the 'hands on hips' pose and the practical design of the suit. Seedream 4.5 offers a much more atmospheric and aesthetically pleasing image with superior lighting and color, though it struggles slightly with hand anatomy and relies on existing IP for the chest emblem. FLUX.2 [flex] is the winner for its precision and cleaner technical execution.
Intricate Floral Mandala
Text-to-Image“Perfectly symmetrical mandala made entirely of real flowers, petals, leaves, fruits, and seeds in vibrant natural colors, intricate layered patterns with radial symmetry, top-down view on a soft neutral background, hyper-detailed organic textures and subtle shadows, photorealistic, 8K masterpiece.”
AI Judge Analysis
FLUX.2 [flex]
- + Excellent adherence to the 'perfectly symmetrical' requirement.
- + Higher density of details and layered patterns, making it feel more like a traditional mandala.
- + Consistent top-down lighting and clean, hyper-detailed textures on every leaf and fruit.
- − Colors are slightly more saturated, giving it a slightly less natural/organic feel than the competitor.
- − Shadows are very subtle, which works for the prompt but slightly reduces depth compared to model B.
Seedream 4.5
- + Beautiful lighting and shadows that create a strong sense of depth and realism.
- + Natural, soft color palette that makes the organic materials look very authentic.
- + Artistic composition with varied textures of delicate petals and stems.
- − Fails the 'perfectly symmetrical' requirement, with many elements being placed asymmetrically around the edges.
- − The arrangement is more of a floral bouquet layout than a geometric mandala.
- − The center of the mandala is somewhat cluttered and lacks clear radial definition.
Verdict: FLUX.2 [flex] much better interprets the request for a 'perfectly symmetrical mandala,' delivering a precise, geometric arrangement of organic elements with incredible detail. While Seedream 4.5 offers more atmospheric lighting and soft realistic textures, it largely ignores the radial symmetry requirement, resulting in a disorganized floral pattern rather than a structured mandala.
Vintage Cafe Logo
Text-to-Image“Vintage minimalist restaurant logo for "Caffè Florian", retro cloche dome with steam and "Est. 1720" banner, classic typography, warm brown and cream tones, subtle texture on light background, vector emblem style.”
AI Judge Analysis
FLUX.2 [flex]
- + Perfect text rendering for both name and date
- + Clean minimalist lines suitable for a modern-vintage logo
- + Excellent vector-style simplicity
- − The steam is very faint and thin
- − Subtle texture on background is almost non-existent
Seedream 4.5
- + Rich vintage aesthetic with good use of hatching and shading
- + Better texture on the background paper
- + Strong steam illustration and more detailed banner
- − The 'a' in 'Caffè' is stylized in a way that looks slightly like an icon/blob
- − The banner construction is slightly more cluttered
Verdict: Both models followed the prompt exceptionally well, rendering the complex text 'Caffè Florian' and 'Est. 1720' with high accuracy. FLUX.2 [flex] is better for a functional, clean vector logo that could be easily scaled, while Seedream 4.5 offers a much richer, more artistic retro illustration with better texture and depth.
Apollo 11: Journey to Tranquility
Text-to-Image“Create a clean, modern vector infographic poster about the Apollo 11 mission. NASA-inspired palette (navy, white, muted red, light gray). Flat-vector style, crisp lines, consistent iconography, subtle gradients only. Steps (stop at landing): 1. Launch (Saturn Vicon) 2. Earth Orbit (Earth + orbit ring icon) 3. Translunar (trajectory arc icon) 4. Lunar Orbit (Moon + orbit ring icon) 5. Descent (lunar module descending icon) 6. Landing (lunar module on the surface icon) Small supporting elements (minimal text): • Crew strip: three silhouette icons with only last names: Armstrong, Aldrin, Collins. • Landing site marker: Moon pin labeled "Tranquility" only. Layout constraints: generous margins, large readable labels, clean background with subtle stars. Vector-only, print-poster look, high resolution.”
AI Judge Analysis
FLUX.2 [flex]
- + Excellent typography and layout consistent with modern poster design.
- + Includes specific technical subtext like 'TLI burn' and 'Parking orbit'.
- + Strictly follows the requested 'navy, white, muted red' NASA color palette.
- − Misses the final 'Landing' step icon requested in the prompt.
- − Iconography layout is a bit scattered and lacks a clear sequential flow.
Seedream 4.5
- + Perfectly follows the numbered sequence of all 6 requested steps.
- + Very clean, horizontal infographic timeline layout that is easy to read.
- + Adds creative relevant details like the crew names and the Tranquility landing site.
- − The 'Descent' icon is a satellite rather than the requested lunar module descending.
- − Minor text alignment issues with the 'NASA' header and the timeline circles.
Verdict: Seedream 4.5 is the clear winner as it successfully incorporated all six requested steps into a cohesive, numbered timeline, whereas FLUX.2 [flex] missed the final landing step and had a more disorganized layout. Seedream 4.5 also demonstrated superior creativity by including the mission crew and landing site names while maintaining the requested flat-vector style.
FLUX.2 [flex]
Black Forest Labs' precision image generation model with maximum control, reliable text rendering, and complete creative control supporting up to 4MP output
Seedream 4.5
ByteDance's latest image generation model unifying text-to-image and image editing in a single architecture, with improved text rendering and 30-40% faster generation than v4.0