Nano Banana vs Grok Imagine Image Pro
Head-to-head across 17 challenges
Nano Banana
46.7%
win rate
Ties
20.0%
Grok Imagine Image Pro
33.3%
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
- + Expertly handles the 'partially visible through the glass' instruction with realistic refraction.
- + Superior lighting and atmosphere with dust motes and soft directional window light.
- + Very high visual quality with a photorealistic, shallow depth-of-field look.
- − The blue sphere is floating inexplicably in the center of the cube, which might seem physically improbable.
- − The book texture is slightly repetitive compared to a real book.
Grok Imagine Image Pro
- + The placement of the sphere at the bottom of the cube follows natural gravity.
- + Clear adherence to all spatial requirements of the prompt.
- + The wood texture of the table is very detailed and realistic.
- − The glass cube looks more like an open glass box or container rather than a solid or sealed cube.
- − The plant is behind the cube but doesn't show much distortion or 'visibility through the glass' as requested.
- − The lighting is somewhat flat compared to the requested soft window light.
Verdict: Nano Banana wins because it brilliantly captures the complex prompt requirement of the plant being partially visible through the glass with realistic refraction and beautiful atmospheric lighting. While Grok Imagine Image Pro follows the spatial instructions well, its glass rendering is less convincing and the lighting lacks the depth and mood found in the first image.
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 cinematic lighting and atmosphere with a strong wet-pavement aesthetic.
- + Very high level of detail in the character's facial textures and clothing.
- + Bicycle mechanics and the newspaper/tool spread add a great sense of realism and narrative depth.
- − The bicycle components are slightly warped, particularly the alignment of the handlebars and the pedal placement.
- − The lighting feels a bit more 'curated' than the 'no stylization' request, though still realistic.
Grok Imagine Image Pro
- + Captures the 'candid' and 'imperfect framing' prompt effectively with a more documentary-style feel.
- + Natural looking motion blur on the background vehicles.
- + Good adherence to the 50mm shallow depth of field request.
- − There are significant anatomical issues with the man's hands handling the wrench.
- − The bicycle frame has structural inconsistencies where the rear stay connects to the seat post.
- − Overall image clarity is lower than Model A, appearing slightly soft.
Verdict: Nano Banana creates a more visually compelling and detailed image with superior atmosphere and skin textures, though it feels slightly more stylized than a raw candid. Grok Imagine Image Pro captures the documentary 'candid' framing better, but suffers from significant anatomical errors in the hands and technical inconsistencies in the bike's structure. Nano Banana is the winner due to its significantly higher overall image quality and better execution of the fine details.
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
- + Successfully includes text descriptions and prices for menu items.
- + Features a clean, centered layout with vibrant colored borders for photo frames.
- + Includes a variety of food items that match the requested categories.
- − Contains significant spelling errors like 'APPEITIERS', 'Brusuechta', and 'Margheitte'.
- − The food images are quite small relative to the overall page size.
- − The text becomes nonsensical in descriptions, such as 'sanilla bean ice cream' for a 'NY Strip' steak.
Grok Imagine Image Pro
- + Excellent photographic quality with consistent lighting and high resolution.
- + Perfectly organized grid layout that aligns with the requested sections (Appetizers, Pizza, Mains).
- + Accurate spelling for all section headers and clean, bold sans-serif typography.
- − Missing item names and prices which were implied by 'restaurant menu design'.
- − The white background is very stark with no secondary accents or footer elements.
Verdict: Grok Imagine Image Pro produces a much more professional and visually appealing layout, with high-quality photography and perfect spelling of section headers. Nano Banana attempts a more complete menu with descriptions and prices, but fails significantly due to numerous typos and nonsensical text pairings. Grok's clean execution of the grid and food imagery makes it the superior design choice for a professional context.
Fantasy Warrior
Text-to-Image“Close portrait of a battle-worn paladin in ornate engraved plate armor, hair braided with small beads, faint scars and dirt on the skin, warm torchlight reflecting off metal, shallow depth of field, bokeh sparks, lifelike eyes, highly detailed texture on leather straps and cloth underlayer.”
AI Judge Analysis
Nano Banana
- + Excellent rendition of a 'battle-worn' appearance with realistic facial aging and weathered skin.
- + Highly ornate armor engravings with a beautiful eagle motif and realistic metal patina.
- + Very clean background bokeh with distinct torch flames and soft sparks.
- − Missing the specific 'small beads' in the hair braids requested in the prompt.
- − Side-profile gaze makes it feel more like a posed character portrait than a cinematic close-up.
Grok Imagine Image Pro
- + Perfect adherence to the 'small beads' prompt, including decorative bone-like beads throughout the hair.
- + Impressive text rendering on the gorget ('Lux in tenebris') which adds to the paladin theme.
- + Intense, lifelike eyes and more noticeable dirt/smudges on the face per the prompt.
- − The sparks in the air look a bit uniform and digitally added compared to the softer bokeh in Model A.
- − The facial structure is very 'modern model' aesthetic, which slightly clashes with the 'battle-worn' description.
Verdict: Grok Imagine Image Pro is the winner for its superior prompt adherence, specifically incorporating the requested beads in the hair and adding appropriate thematic text to the armor. While Nano Banana captures a more convincing 'aged' warrior look, Grok Imagine Image Pro provides a more detailed and accurate interpretation of the specific textures and lighting requested.
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 hair texture and realistic messy volume.
- + Excellent preservation of the facial features and original lighting.
- + Seamless integration of the hair with the forehead and background.
- − The glasses frame on the left side (viewer's left) becomes slightly distorted/blended into the hair.
Grok Imagine Image Pro
- + Very clean and realistic hairline.
- + Maintains the structural integrity of the glasses better than Model A.
- + Perfectly preserves the original background and lighting.
- − The hairstyle is slightly more 'styled' and less 'thick/full' than requested compared to Model A.
Verdict: Both models performed exceptionally well, maintaining the original identity, lighting, and background of the source image. Nano Banana provided a thicker, more natural-looking head of hair that feels more organic to the character's rugged aesthetic, though it slightly muddied the glasses frame; Grok Imagine Image Pro provided a cleaner, more groomed look with a very precise hairline that perfectly preserved all accessories.
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 captures the requested isometric 3D perspective.
- + Clean and bold text rendering that matches the hierarchy requested.
- + High-quality 3D diorama aesthetic with consistent lighting and materials.
- − The flag icon is placed to the left of the text rather than at the top-center as requested.
Grok Imagine Image Pro
- + Excellent material textures, especially on the salmon and wooden base.
- + Highly detailed food models with realistic PBR-like sheen.
- + Accurate placement of the text and flag according to the layout prompt.
- − The perspective is more of a standard high-angle shot rather than a true 45° isometric view.
- − The white text on a light blue background has lower legibility compared to Model A.
Verdict: Nano Banana followed the architectural style of the prompt better, delivering a true 45° isometric diorama that looks like a high-end 3D render. Grok Imagine Image Pro produced more realistic textures and food details, but failed the geometric 'isometric' requirement of the perspective. Nano Banana's bold black text is also much more readable against the solid blue background.
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
- + Perfectly adheres to the edit instructions.
- + Maintains identical structural integrity to the source image architecture.
- + Realistic white point and light falloff for a night scene.
- − Slightly lower contrast in the star field compared to the other model.
Grok Imagine Image Pro
- + Excellent adherence to the edit request.
- + High preservation of the foreground and village details from the source image.
- + Crisp, visible star field that feels very atmospheric.
- − The transition along the mountain ridge has very minor aliasing artifacts.
Verdict: Both Nano Banana and Grok Imagine Image Pro performed exceptionally well on this task, with both models appearing to find the exact same solution for replacing the sky while maintaining the town and mountain structure perfectly. Grok Imagine Image Pro has slightly more 'glistening' stars as requested, while Nano Banana feels marginally more natural in its lighting integration.
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
- + Excellent preservation of the subject's facial features and eye shape.
- + Sophisticated caricature style with clever details like the 'Breaking: Dog Scores Goal' text.
- + Clean, high-quality illustration style with consistent lighting and shadows.
- − The addition of a hyper-muscular arm feels a bit random and unrelated to the specific prompt instructions.
Grok Imagine Image Pro
- + Very humorous and literal interpretation of all prompt elements (hockey cup, stick, multiple dogs).
- + Strong, readable text elements that add to the 'TV anchor' theme.
- + Exaggerated facial expressions that fit the caricature brief well.
- − The subject's facial likeness is significantly less accurate compared to the source image than Model A.
- − Some visual clutter makes the composition feel a bit crowded.
Verdict: Nano Banana maintains an impressive likeness to the original subject while translating her into a stylized caricature. Grok Imagine Image Pro goes further with the 'humorous' and 'exaggerated' aspects of the prompt by including more props and dogs, but the facial recognition is lost in the process. Nano Banana is the preferred output for its superior balance of artistic transformation and source preservation.
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 adherence to the count and species of animals requested.
- + Superior rendering of eye expressions and soft fur textures.
- + Dreamy, magical lighting with subtle 'god rays' that enhance the wholesome vibe.
- − The composition is a bit crowded with the animals very close together in the center.
- − The butterfly on the puppy's ear looks somewhat pasted on.
Grok Imagine Image Pro
- + Better sense of action and 'tumbling' as requested in the prompt.
- + Includes more varied floral elements and a wider landscape view.
- + Stronger 'god rays' and morning atmosphere.
- − Failed the animal count by including two kittens instead of one.
- − The puppy's anatomy looks slightly awkward in its leaping pose.
- − Some butterflies appear to have disjointed wing structures.
Verdict: Nano Banana followed the prompt instructions more accurately by providing the specific set of four animals requested, whereas Grok Imagine Image Pro added an extra kitten. While Grok Imagine Image Pro captured the 'tumbling' and 'chasing' action more dynamically, Nano Banana's superior character rendering and adherence to the prompt make it the better overall image.
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
- + Incredible level of fine detail in the intricate ironwork and glass textures.
- + Excellent representation of 'misty atmosphere' with realistic light diffusion.
- + Superior rendering of dew on leaves and condensation on the glass panes.
- − The butterflies look a bit static and 2D compared to the environment.
- − The composition is slightly cluttered with a very high density of flowers.
Grok Imagine Image Pro
- + Grand architectural composition with a beautiful vaulted glass dome.
- + Better sense of depth and scale in the greenhouse interior.
- + Butterflies are integrated well into the 3D space with more natural posing.
- − Lacks the specific 'caustics and dew' detail requested in the prompt.
- − The lighting feels a bit more generic and less 'misty' than Model A.
Verdict: Nano Banana excels in fine-grained texture and atmosphere, capturing the specific details of dew, mist, and ornate ironwork with stunning precision. Grok Imagine Image Pro offers a more impressive architectural composition and a better sense of scale, but it misses the specific lighting and moisture effects requested. Nano Banana is the preferred choice for its closer adherence to the complex atmospheric prompts.
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 full-body composition with a clear, realistic urban background including the Empire State Building.
- + High level of costume detail with visible fabric textures and realistic leather-look gloves/boots.
- + Superior lighting consistency between the character and the environment.
- − The hands on the hips have slight anatomical clipping/merging into the suit.
- − The pose is slightly more rigid compared to the dynamic cape flow.
Grok Imagine Image Pro
- + Strong, determined facial expression and eyes looking directly forward/slightly off-camera.
- + Vibrant color palette and iconic emblem design.
- + Dynamic cape billowing that fills the frame more effectively.
- − The scale of the character relative to the background feels slightly off, appearing greenscreen-like.
- − Noticeable anatomy issues on the hands/fingers placed on the hips.
- − The horizon line and rooftop texture are a bit softer/less detailed than the character.
Verdict: Nano Banana produces a much more coherent and photographically realistic image where the character feels naturally integrated into the New York setting. While Grok Imagine Image Pro has a striking suit design and bold colors, it suffers from significant hand artifacts and a flatter lighting profile compared to Nano Banana.
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 'perfectly symmetrical' with precise radial alignment.
- + Highly realistic texture on the citrus slices and ferns.
- + Clean, neutral background with a subtle linen texture that enhances the organic feel.
- − Colors are slightly muted compared to Model B.
- − The central seed area feels a bit flat visually.
Grok Imagine Image Pro
- + Vibrant, rich color palette with high visual impact.
- + Includes a great variety of elements like pomegranates and walnuts as requested by 'fruits and seeds'.
- + Sophisticated blooming flower textures in the outer ring.
- − Symmetry is imperfect; several elements are skewed or misaligned in the outer rings.
- − Lighting is a bit more artificial/saturated rather than naturally photorealistic.
Verdict: Nano Banana captures the prompt's request for perfect symmetry much more effectively, creating a layout that feels mathematically precise yet organic. While Grok Imagine Image Pro offers more vibrant colors and a delightful variety of fruits and nuts, it fails the 'perfectly symmetrical' requirement with several misaligned elements in its radial pattern. Nano Banana is the better choice for its structural integrity and realistic textures.
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
- + Excellent preservation of original high-frequency details like freckles and skin pores
- + Perfect technical execution with no blurring or artifacts in the edited areas
- + Maintains exact eye shape and identity from the source
- − The smile is slightly broader than requested, altering the lip shape more than Grok Imagine Image Pro
Grok Imagine Image Pro
- + Subtle and more natural-looking 'Duchenne' smile that feels slightly more genuine
- + Good preservation of identity and lighting
- − Slight loss of original skin texture/freckles compared to the source image
- − Noticeable softening of the pores on the cheeks and nose
Verdict: Both models successfully added a genuine smile while maintaining the subject's identity. Nano Banana is the superior choice for high-fidelity editing, as it preserved every original freckle and skin pore from the source, whereas Grok Imagine Image Pro slightly smoothed the skin texture during the editing process.
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
- + Excellent source preservation of the original subjects
- − Failed the primary instruction to transform the image into an illustration
- − Retains a purely photographic look with minimal filters
- − Lacks the requested pastel colors and hand-painted textures
Grok Imagine Image Pro
- + Perfectly captures the Studio Ghibli illustration style
- + Excellent use of hand-painted watercolor textures and soft pastel colors
- + Maintains the composition and character expressions of the source image while stylizing them
- − Minor loss of detail in some background areas
Verdict: Nano Banana failed to perform the requested edit, providing what looks like the original photo with very minor color adjustments. Grok Imagine Image Pro successfully transformed the meme into a beautiful Studio Ghibli-style watercolor illustration while perfectly maintaining the recognizable layout and character roles.
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
- + Successfully added wind movement to the hair.
- + Provided high-quality, autumnal leaves with varying detail and motion blur.
- + Preserved the woman's face and the dog's appearance perfectly.
- − One leaf is awkwardly layered or merged into the leash.
Grok Imagine Image Pro
- + Added a significant amount of leaves to create a more energetic feeling.
- + Achieved a natural wind-blown effect on the hair.
- + Maintained excellent source preservation of the subject and background.
- − Some leaves exhibit minor artifacts or appear as flat yellow shapes without detail.
- − The density of the leaves feels a bit artificial compared to the surrounding greenery.
Verdict: Both models followed the instructions very well, effectively adding wind-blown hair and flying leaves while preserving the original person and dog. Nano Banana produced more realistic-looking leaves with better textures, whereas Grok Imagine Image Pro provided a higher volume of leaves that arguably fits the 'energetic and lively' prompt better, though some of its leaves look like simple clip-art shapes.
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
- + Excellent adherence to the 'warm brown and cream' color scheme.
- + Superior typography with graceful curves and correct accent usage.
- + The cloche and banner design feels more cohesive and 'vintage' in style.
- − Small artifacts in the steam lines where they meet the cloche dome.
Grok Imagine Image Pro
- + Clean, high-contrast vector lines.
- + Very legible 'EST. 1720' text.
- + Effective subtle texture on the background.
- − The cloche is grey, which violates the requested 'warm brown and cream' palette.
- − The typography for 'CAFFÈ' has a slightly awkward, blocky spacing.
- − The 'banner' for the date is just a solid block of color rather than a traditional banner style.
Verdict: Nano Banana is the clear winner as it perfectly captures the requested 'warm brown' color palette and vintage aesthetic, whereas Grok Imagine Image Pro introduced grey tones that were not requested. Nano Banana's typography is more elegant and its representation of the 'cloche dome with steam' and 'banner' feels much more like a professional restaurant 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
- + Clean, professional vector aesthetic with consistent line weights.
- + Follows the color palette closely with a deep navy background.
- + Very readable text and clear iconography for the steps.
- − The iconography for Descent and Lunar Orbit is identical.
- − The composition has large empty spaces in the upper quadrant.
Grok Imagine Image Pro
- + Accurately renders different icons for every single requested step.
- + Excellent character headshots for the crew with correct names.
- + Better vertical composition that leads the eye through the timeline.
- − Small details like the flag on the landing module look a bit messy.
- − Background is a simple gray rather than the navy requested for the primary feeling.
Verdict: Grok Imagine Image Pro followed the prompt instructions more accurately by providing unique icons for every step, including a distinct lunar module for the descent and landing phases, whereas Nano Banana repeated the same icon for stages 4 and 5. Grok Imagine Image Pro also exhibited better text rendering for the crew names, though Nano Banana had a sleeker, more professional graphic design feel.
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.
Grok Imagine Image Pro
xAI's premium image generation model offering higher fidelity output and stronger performance on single-image editing benchmarks compared to the standard Grok Imagine model