Nano Banana vs Seedream 4.0
Head-to-head across 17 challenges
Nano Banana
65.5%
win rate
Ties
3.4%
Seedream 4.0
31.0%
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
Nano Banana
- + Excellent lighting effects with dust motes and realistic shadows.
- + High-quality textures on the book cover and wooden table.
- + The plant is clearly visible through the glass cube as requested.
- − The blue sphere is levitating inside the cube, which feels physically unnatural.
- − The glass cube appears to be a solid block of glass rather than a hollow vessel.
Seedream 4.0
- + Perfect adherence to the spatial requirements of the prompt.
- + Realistic representation of a hollow glass cube with reflections.
- + Good depth and placement of the green plant behind the glass.
- − The mirrored base inside the cube creates a slightly distracting double reflection.
- − Slightly lower resolution/clarity in the background compared to Nano Banana.
Verdict: Seedream 4.0 followed all instructions perfectly, creating a realistic scene where the sphere sits naturally at the bottom of a hollow glass cube. While Nano Banana has superior lighting and textures, its decision to make the sphere float and the cube solid makes it feel less like a real object arrangement. Seedream 4.0 is preferred for its superior spatial accuracy and prompt adherence.
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
Nano Banana
- + Excellent structure that follows the requested grid layout.
- + Contains comprehensive text for all requested sections including appetizers, pizza, and mains.
- + High visual quality with consistent food photography and colorful accents.
- − Several spelling errors in the text like 'Appeitiers', 'Brusuechta', and 'Margheitte'.
- − Some logical errors in descriptions, such as 'NY Strip' being described as 'vanilla bean ice cream'.
Seedream 4.0
- + Large, appetizing food photography with high clarity.
- + Bold, readable sans-serif fonts for section headers.
- − Does not follow the grid layout properly, resulting in a cluttered composition.
- − Lacks actual menu items or prices, containing only the section headers.
- − The pizza along the right side is oddly cropped.
Verdict: Nano Banana followed the layout instructions much more effectively, providing a complete menu structure with a grid of images and distinct sections for different food categories. While Seedream 4.0 has high-quality photography, it fails to produce a functional menu design, offering only headers and scattered images instead of a professional layout.
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
Nano Banana
- + Excellent use of bokeh and cinematic lighting with vibrant red and blue tones.
- + High level of detail in skin texture and clothing materials.
- + Very clear, focused subject amidst a busy background.
- − The composition feels a bit too 'posed' and perfect for a requested candid shot.
- − The bicycle is missing its chain, which is a significant logical error for a repair scene.
Seedream 4.0
- + Stronger adherence to the 'candid' and 'imperfect framing' request with a more natural, snapshot feel.
- + Effective motion blur on the passing vehicle in the background.
- + Convincing puddle reflections and wet pavement texture.
- − Major anatomical and structural issues with the man's legs and the bicycle frame merging.
- − Lower overall resolution and clarity compared to Model A.
Verdict: Nano Banana produces a visually stunning, cinematic image with superior textures, but it fails on the basic logic of the bicycle (no chain) and feels a bit over-stylized despite the prompt. Seedream 4.0 better captures the 'candid street photo' aesthetic and motion blur, but suffers from significant AI artifacts where the person and the bicycle occupy the same space.
Man and Car in California
Editing“Make a photo of the man driving the car down the California coastline”
AI Judge Analysis
Nano Banana
- + Excellent preservation of the source car's details and reflections.
- + The motion blur on the wheels and road creates a convincing sense of speed.
- + Landscape background is realistic and fits the California coastline request.
- − The man is barely visible and does not strongly resemble the specific subject from the source image.
- − The lighting on the man's head doesn't quite match the bright exterior sun.
Seedream 4.0
- + Successfully incorporates the specific man from the source image, including his hairstyle, scarf, and coat.
- + Good composition with a more dramatic 'Big Sur' style coastal road.
- + High accuracy in transferring the car model to the new environment.
- − The man's scale seems slightly too large for the car's interior.
- − The integration of the man's hands on the steering wheel is a bit painterly/blurry.
Verdict: Seedream 4.0 is the winner because it successfully combined both source images: the specific car and the specific man. Nano Banana produced a high-quality image of the car, but the driver is a generic figure that lacks the distinctive features (hairstyle, plaid coat, scarf) of the man in the source photo.
Bald man challenge
Editing“Give the person a full, thick head of natural hair with realistic texture, density, and a natural hairline. Preserve facial features and lighting.”
AI Judge Analysis
Nano Banana
- + Natural and messy hair texture that matches the rugged aesthetic
- + Excellent preservation of the source image identity and details
- + Seamless integration of hair with the existing sideburns and forehead
- − None notable
Seedream 4.0
- + Follows the instruction for a thick head of hair
- + Maintains facial features and clothing accurately
- − Hairline and hair shape look artificial and 'helmet-like'
- − The hair texture is overly uniform and lacks the realistic flow of the original beard
Verdict: Nano Banana provided a much more realistic and aesthetically pleasing edit, creating hair that looks like it naturally belongs to the subject. Seedream 4.0 followed the instructions, but the resulting hair looks like an poorly-fitted wig with a very harsh, straight hairline that doesn't match the rugged lighting of the scene.
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
Nano Banana
- + Perfectly rendered text and flag icon.
- + Very clean, soft 3D cartoon aesthetics.
- + Accurate isometric perspective and centered composition.
- − The rice texture looks a bit blocky or popcorn-like rather than soft grains.
Seedream 4.0
- + Beautiful material rendering, particularly the translucency of the fish.
- + Includes a tactile bamboo mat detail on the plate.
- + Excellent lighting and shadow depth.
- − Text is slightly less clean than Model A, with a minor artifact in the letter 'A'.
- − The flag icon is placed to the side rather than top-center with the text.
Verdict: Both models followed the prompt exceptionally well, producing high-quality isometric dioramas. Nano Banana has the edge in graphic design and typography, providing perfectly clean text and a more balanced icon placement, whereas Seedream 4.0 excels in the miniature 3D rendering of the food materials themselves, making the sushi look slightly more appetizing.
Night Sky Transformation
Editing“Change the scene to night: a deep, dark sky with subtle, glistening stars visible behind the mountain.”
AI Judge Analysis
Nano Banana
- + Excellent source preservation, keeping town and landscape layout identical.
- + Realistic star density and deep night sky color.
- + Subtle lighting adjustments across the mountains feel natural for night time.
- − Some stars are rendered over the silhouette of the mountains on the left.
Seedream 4.0
- + Good source preservation of the town and terrain.
- + Strong contrast in the sky creates a moody atmosphere.
- + Stars are mostly restricted to the sky area.
- − Stars look a bit sparse and like individual bright dots rather than a glistening sky.
- − Some 'star' artifacts appear over the dark parts of the mountains on the left.
Verdict: Both models did an excellent job of preserving the source image while applying the lighting change. Nano Banana (Image A) is the winner because the star field looks much more natural and 'glistening' as requested, whereas Seedream 4.0 used larger, more isolated dots for stars. Nano Banana also handled the transition of light on the Matterhorn peak more realistically for a moonlight/night scene.
Over-the-top cartoon caricature
Editing“Create a caricature of me and my job. Make it exaggerated and humorous, incorporating my profession as a tv show anchor and my love for dogs and hockey.”
AI Judge Analysis
Nano Banana
- + Expertly captures the caricature art style with exaggerated features and a giant head.
- + Creatively weaves all prompt elements together, such as the dog wearing a hockey helmet and the news ticker text.
- + Strong visual storytelling with a detailed studio background overlooking a hockey rink.
- − The facial features, while caricaturized, lose some of the specific likeness of the source subject.
- − Anatomical oddity with a giant muscular arm that wasn't specifically requested.
Seedream 4.0
- + Maintains a much stronger facial likeness to the original woman despite the caricature proportions.
- + Preserves elements of the original setting (the couch and frames) while adding the desk.
- + Includes all requested elements: anchor desk/mic, hockey jersey/stick, and a dog.
- − Significant anatomical errors, particularly the tiny, distorted hand holding the microphone.
- − The overall composition feels a bit cluttered and less polished than the stylized approach of Nano Banana.
Verdict: Nano Banana provides a superior artistic interpretation of a caricature, creating a cohesive and humorous scene that feels like a professional illustration. While Seedream 4.0 does a better job of preserving the woman's actual face and the original background, it suffers from severe rendering artifacts in the hands and a less imaginative layout.
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
Nano Banana
- + Excellent fur texture and detail on all four animals.
- + Very clean composition with clear god rays and soft lighting.
- + Includes all requested animals with distinct, high-quality features.
- − The animals look a bit stiff and posed rather than actively 'tumbling' or 'chasing'.
- − Digital illustrative feel that leans away from 'hyper-photorealistic'.
Seedream 4.0
- + Captures a much more dynamic sense of movement and 'tumbling' action.
- + The lighting and dew sparkles feel more integrated and realistic.
- + Better adherence to the 'playfully chasing' part of the prompt.
- − The kitten has blue eyes which is less common for a standard tabby, and its face is slightly less defined.
- − The fox's anatomy is a bit awkward where it meets the grass.
Verdict: Nano Banana creates a beautiful, clean, and well-composed image with high detail, but the animals feel a bit static and illustrative. Seedream 4.0 captures the spirit of the prompt much more effectively, showing the animals in active, joyful motion with a lighting quality that feels more photographic despite minor anatomical imperfections.
Victorian Greenhouse Oasis
Text-to-Image“Hyper-photorealistic interior of a lush Victorian glass greenhouse filled with exotic tropical plants, vibrant blooming orchids, tall ferns, colorful butterflies in flight, sunlight filtering through ornate glass roof creating realistic caustics and dew on leaves, intricate iron framework visible, misty atmosphere, 8K masterpiece.”
AI Judge Analysis
Nano Banana
- + The iron framework is extremely detailed and structurally coherent.
- + Exhibits a vast variety of colorful orchids and tropical foliage that feels lush and expansive.
- + The composition provides a beautiful sense of depth with the cobblestone path leading to a focal bench.
- − The butterflies are somewhat static and many lack a realistic 'in-flight' motion blur.
- − The 'misty' atmosphere is more of a general haze than visible mist.
Seedream 4.0
- + Exceptional rendering of dew droplets on the leaves in the foreground.
- + The lighting and mist are more dynamic, creating a stronger sense of atmosphere and volume.
- + Butterflies feel more integrated into the 3D space with better scale and positioning.
- − The iron framework on the left side becomes warped and structurally nonsensical.
- − The composition feels slightly more cluttered and less organized than image A.
Verdict: Nano Banana creates a more balanced and intricately detailed architectural scene with a vast array of flowers, while Seedream 4.0 excels in atmospheric effects like mist and macro-details like dew. Nano Banana is the preferred version because its ironwork is consistent and its composition feels like a complete masterpiece, whereas Seedream 4.0 has noticeable structural artifacts in the greenhouse roof.
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
Nano Banana
- + Excellent facial features and skin texture detail
- + Clean, symmetrical superhero logo with unique design
- + Strong, stable composition with clear urban depth
- − Lighting feels slightly more studio-lit than natural sunset
- − Missing the gloves requested in the prompt
Seedream 4.0
- + Captures the golden hour sunset lighting beautifully
- + Includes more intricate suit detailing and fabric textures
- + Dynamic cape movement that interacts logically with the scene
- − The S-shield logo is slightly distorted/asymmetrical
- − The hands on hips pose leads to some anatomy blurring at the fingers
- − Slightly less clarity in the facial features compared to Model A
Verdict: Nano Banana produces a cleaner image with superior facial detail and a unique, sharp emblem, but it misses the gloves and has flatter lighting. Seedream 4.0 better captures the atmospheric 'golden hour' warmth and complex suit textures, though it suffers from minor logo distortions. Nano Banana is the winner for its overall clarity and polish despite the minor prompt omission.
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
Nano Banana
- + Excellent adherence to the 'perfectly symmetrical' requirement with precise radial geometric alignment.
- + Very high detail and clarity, making individual elements like chia seeds and citrus pulp clearly visible.
- + Stronger adherence to the prompt's mention of fruits, incorporating sliced citrus and berries in a logical way.
- − The lighting is somewhat flat compared to the more cinematic lighting of the other model.
- − The placement of elements feels slightly more digital and less like physical objects resting on a surface.
Seedream 4.0
- + Beautiful lighting and shadows that give the image a more tactile, 3D organic feel.
- + Rich, painterly colors and a soft, pleasing background that creates depth.
- + Good variety of botanical textures including leaves and various whole fruits.
- − Fails the 'perfectly symmetrical' requirement, with asymmetric fruit placement and inconsistent radial patterns.
- − Some elements in the center appear muddily blended or lack distinct edges.
- − The composition is more of a wreath than a structured mandala.
Verdict: Nano Banana followed the prompt much more accurately, especially regarding the 'perfectly symmetrical' and 'mandala' requirements, resulting in a clean, high-resolution layout of individual botanical items. Seedream 4.0 produced a more artistically shaded image with better lighting, but it failed to achieve the requested radial symmetry and the intricate patterns typical of a mandala. Nano Banana is the winner for its superior technical execution and prompt adherence.
Neutral Expression to Genuine Smile
Editing{
"action": "image_edit",
"reference": "uploaded neutral portrait",
"change": "Warm genuine Duchenne smile: lips curved up, slight natural teeth, soft eye crinkles, subtle cheek raise",
"details": "Realistic smiling skin (dimples if present, soft cheek shadows), slightly brighter eyes; keep exact eye shape/color/iris",
"preserve_exact": "Face identity/structure, eyes/nose/lips/eyebrows, hair, skin texture/pores/freckles, makeup, clothing, head pose, background, lighting, shadows, framing",
"no_changes": "No face shape change, no new features, no gaze shift, no hair/clothing/lighting/background edits",
"style": "Ultra-photorealistic 8K portrait, sharp face focus, natural soft lighting, realistic skin glow"
}
AI Judge Analysis
Nano Banana
- + Perfect preservation of original skin texture and freckles
- + Extremely accurate Duchenne smile with subtle eye crinkles
- + Maintains exact hair strands and backdrop
Seedream 4.0
- + Natural and warm smiling expression
- + Good preservation of facial structure
- − Noticeable loss of skin detail and freckles due to smoothing
- − Added highlights to the face that weren't in the original lighting
- − Slightly altered the shape of the nose and chin area
Verdict: Nano Banana followed the prompt perfectly, applying a realistic smile while keeping every single pore, freckle, and hair strand from the source image. Seedream 4.0 provided a nice expression but softened the skin texture and slightly altered the facial details, failing the strict preservation requirement.
Studio Ghibli Anime Style
Editing“Transform this photo into a Studio Ghibli–inspired illustration. Use soft pastel colors, hand-painted textures, gentle lighting, dreamy backgrounds, and a warm, nostalgic mood”
AI Judge Analysis
Nano Banana
- + Perfectly preserves the composition and identity of the source photo
- − Completely fails the editing prompt, applying only a minor smoothing/blur filter
- − Does not adopt the Studio Ghibli illustration style at all
Seedream 4.0
- + Excellently captures the Studio Ghibli 'Kaguya-hime' or watercolor-inspired aesthetic
- + Maintains the core composition and character poses from the original meme
- + Uses a beautiful pastel watercolor texture that fits the prompt perfectly
- − Relies on a simplified line-art style that loses the specific facial features of the original people
Verdict: Nano Banana failed the instruction almost entirely, providing a slightly blurred version of the original photo. Seedream 4.0 successfully transformed the image into a hand-painted Ghibli-inspired illustration while perfectly preserving the iconic composition of the 'Distracted Boyfriend' meme.
Golden Hour Stroll
Editing“Add dynamic motion to this photo: make hair blow in the wind, add leaves flying, energetic and lively feel.”
AI Judge Analysis
Nano Banana
- + Excellent source preservation, maintaining her facial features and clothing details perfectly.
- + Natural-looking hair movement that flows in a consistent direction.
- + The leaves are vibrant and have a variety of shapes that feel integrated into the scene.
Seedream 4.0
- + Successfully adds the requested motion elements.
- + The hair has a very wide spread, creating a strong sense of wind.
- − The woman's face has been altered significantly, losing the likeness of the original image.
- − The overall image quality is blurrier than the source, especially on the leaves and background.
- − Motion blur on the leaves feels a bit artificial and uniform.
Verdict: Nano Banana is the clear winner as it successfully adds the dynamic elements while perfectly preserving the identity of the woman and the crisp quality of the source image. Seedream 4.0 struggles with source preservation, notably changing the woman's facial features and introducing a slight blurriness to the entire composition.
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
Nano Banana
- + Perfect text rendering for both name and date
- + Clean circular vector emblem composition
- + Captures the minimalist vintage style accurately
- − Steam effect icon is placed inside the dome rather than rising from it
- − Slightly less 'subtle texture' on the background compared to the other model
Seedream 4.0
- + Excellent paper-like texture on the background
- + Great use of shading and depth on the cloche dome
- + Accurate placement of steam rising from the dome
- − The 'f' in 'Caffé' has a slight artifact or double-top look
- − The banner wings are disjointed from the main body of the banner
Verdict: Nano Banana produces a superior vector emblem with perfect typography and a clean professional layout, though it interprets the 'steam' as an icon on the dome itself. Seedream 4.0 has more artistic shading and a better background texture, but suffers from small anatomical errors in the banner and typography. Nano Banana is the overall winner for its clarity and usability as a logo.
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
Nano Banana
- + Strict adherence to all six requested steps with perfectly legible and consistent icons.
- + Excellent layout with a professional, clean vector aesthetic and consistent iconography.
- + Perfect color palette usage (navy, white, muted red) as requested in the prompt.
- − Subtle glow effects on icons slightly deviate from the 'flat-vector' request.
- − The character icons for the crew are very generic bathroom-style figures.
Seedream 4.0
- + Good use of the requested color palette and clear numbering for the steps.
- + Successfully depicts the specific Lunar Module (LEM) shape in the descent step.
- + Accurate text spelling for the crew names and landing site.
- − Failed to deliver 6 separate icons, combining 'Descent' and 'Landing' under one illustration/number.
- − Vector lines are less crisp with some 'wiggly' artifacts on the orbit rings and text.
- − The layout feels cluttered with a heavy gray band through the center.
Verdict: Nano Banana is the superior infographic, strictly following the 6-step sequence and maintaining a highly professional, consistent vector style. Seedream 4.0 failed to provide distinct visuals for all requested steps and has lower-quality line work, resulting in a less polished final poster.
Nano Banana
Gemini 2.5 Flash Image is optimized for image understanding and generation, offering a balance of price and performance with fast and efficient image generation and editing capabilities.
Seedream 4.0
ByteDance's image generation model with integrated text-to-image and image editing capabilities in a unified architecture, supporting up to 4K resolution