Black Forest Labs' ultra-high resolution image generation model, an enhanced version of FLUX1.1 [pro] optimized for premium quality output
Settled by community votes across 13 shared challenges, with an AI judge weighing in on each.
FLUX1.1 [pro] Ultra
18.5
arena score
#49 of 62 in Text-to-Image
Skill signature
· Text-to-Image
Seedream 4.5
26.1
arena score
#9 of 62 in Text-to-Image
Vote tally
Where the votes landed
FLUX1.1 [pro] Ultra
0%
win rate
Ties
0%
Seedream 4.5
0%
win rate
Shared challenges
13
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.”
FLUX1.1 [pro] Ultra
Seedream 4.5
AI Judge Analysis
FLUX1.1 [pro] Ultra
- + Excellent photorealism with realistic glass refraction and dust particles.
- + The plant is very clearly visible through the glass as requested.
- + Highly detailed texture on the red book cover.
- − The blue sphere is levitating mid-air inside the cube, which feels physically unnatural despite the high realism.
- − The sphere looks more like a plastic or solid painted ball than glass.
Seedream 4.5
- + Accurately depicts a glass blue sphere resting naturally on the bottom surface.
- + Correct lighting and shadows that align with the window light source.
- + The plant's distortion through the glass panes is physically plausible.
- − The glass cube has some slight perspective distortion on the far edges.
- − The book's edges are a bit simple compared to the texture in Image A.
Verdict: Both models followed the prompt perfectly. FLUX1.1 [pro] Ultra has a slight edge in pure resolution and texture detail, particularly on the book. However, Seedream 4.5 feels more grounded in physical reality as the sphere sits on the bottom of the cube rather than floating, and its blue sphere has a nice glass-like transparency.
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.”
FLUX1.1 [pro] Ultra
Seedream 4.5
AI Judge Analysis
FLUX1.1 [pro] Ultra
- + Excellent depiction of motion blur with an oncoming vehicle
- + Very clean and sharp rendering of the man and the bicycle
- + Highly realistic reflections on the wet asphalt and crosswalk
- − The man appears to be standing and leaning rather than 'repairing' the bike
- − The composition feels a bit too staged and clean for a 'candid' street photo
- − The raining effect is barely visible compared to the wet ground
Seedream 4.5
- + Perfect interpretation of 'repairing' with the crouching pose and focus on the gears
- + Stronger 'candid' feel with the imperfect framing and close-up perspective
- + Excellent atmospheric details like rain droplets on the jacket and vivid neon reflections
- − The motion blur on the car in the background is slightly less convincing than Model A
- − The bike's proportions and pedal placement are slightly warped near the bottom
Verdict: While FLUX1.1 [pro] Ultra produces a cleaner image with more realistic motion blur, Seedream 4.5 captures the spirit of the prompt much better. Seedream 4.5's choice to have the man crouching captures the 'repairing' action more effectively, and the lighting and rain textures create a more convincing cinematic street scene.
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.”
FLUX1.1 [pro] Ultra
Seedream 4.5
AI Judge Analysis
FLUX1.1 [pro] Ultra
- − The image is completely black and failed to render.
Seedream 4.5
- + Excellent adherence to all prompt details including braided hair with beads, scars, and ornate armor.
- + Outstanding skin texture and iris detail for a lifelike appearance.
- + Effective use of warm lighting and bokeh sparks to create atmosphere.
- − The leather strap across the chest has slightly inconsistent stitching detail near the center.
Verdict: FLUX1.1 [pro] Ultra failed to generate a visible image, resulting in a black square. Seedream 4.5 produced a high-quality, professional rendering that perfectly captured the battle-worn aesthetic and intricate material details requested in the prompt.
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.”
FLUX1.1 [pro] Ultra
Seedream 4.5
AI Judge Analysis
FLUX1.1 [pro] Ultra
- + Excellent professional mock-up style with realistic drop shadows.
- + Better variety of food photos that feel cohesive.
- + Clean white background with a sophisticated multi-column layout.
- − Several spelling errors such as 'Pizzzans' and 'Appet Love'.
- − The layout is a bit cluttered compared to a true minimalist standard.
Seedream 4.5
- + Stronger adherence to the 'minimalist' and 'grid' descriptors.
- + Bold sans-serif typography is very clear and legible.
- + Vibrant color-coded accents distinguish the sections effectively.
- − Images are slightly generic and the framing is very tight.
- − Less realistic as a 'casual dining' menu mock-up compared to Image A.
Verdict: FLUX1.1 [pro] Ultra provides a more realistic and professional restaurant mock-up with a complex layout, but it suffers from several noticeable typos. Seedream 4.5 offers a cleaner, more minimalist design that follows the grid prompt more strictly, though its presentation is simpler. FLUX1.1 [pro] Ultra is the likely winner for its superior visual depth and professional aesthetic.
Magic Burger Explosion: Fiery Photorealism Challenge
Text-to-Image“Ad for 'Magic Burger'. Dynamic, exploded burger with all components (bun, patty, cheese, lettuce, tomato, sauce) suspended in mid-air. Emphasize photorealistic detail and a sense of motion. Dark, fiery background with glowing embers. Integrate text: 'MAGIC BURGER' as a prominent title, 'LIMITED TIME ONLY' as a secondary message, and '€6.99' in a starburst, all rendered with a fiery, glowing effect.”
FLUX1.1 [pro] Ultra
Seedream 4.5
AI Judge Analysis
FLUX1.1 [pro] Ultra
- + Excellent typography with a glowing halo effect
- + Crisp, photorealistic food textures and lighting
- + Highly dynamic composition with scattered ingredients
- − Missed the starburst element for the price
- − Includes some AI-generated gibberish text at the bottom corners
Seedream 4.5
- + Perfect adherence to the starburst container for the price
- + Better execution of the fiery glowing effect on the title font
- + Stronger sense of motion with motion blur on falling ingredients
- − The burger is less of an 'exploded' view compared to Model A
- − Composition feels slightly more crowded and less balanced
Verdict: Both models followed the complex prompt with high accuracy and visual appeal. FLUX1.1 [pro] Ultra created a more sophisticated food photography aesthetic with clearer details, but Seedream 4.5 adhered more closely to the specific graphic elements like the starburst and the fiery font style. Seedream 4.5 is the winner for its superior integration of all requested text elements and more convincing motion effects.
Chalkboard Menu
Text-to-Image“Handwritten-style chalkboard menu in a cozy café, all text rendered in the exact same realistic chalk handwriting style with natural variations in letter size, slight slant, and chalk texture — no printed or digital fonts anywhere on the board. Title at the top in elegant cursive chalk handwriting: ‘TODAY’S SPECIALS – APRIL 30, 2026’. Below it, three menu items also in the same handwritten chalk style: ‘Truffle Mushroom Risotto – $24’, ‘Grilled Octopus with Lemon & Herbs – $28’, ‘Brown Butter Chocolate Chip Cookies – $9’. At the very bottom, smaller text in the identical handwritten chalk style (slightly smaller but still clearly legible with the same handwriting characteristics): ‘All items made fresh daily • Ask about our gluten-free options’. Warm ambient café lighting, visible chalk dust and smudges, realistic handwriting imperfections, no clean printed text anywhere.”
FLUX1.1 [pro] Ultra
Seedream 4.5
AI Judge Analysis
FLUX1.1 [pro] Ultra
- + Features a realistic wood frame and café background.
- + The chalk text has a distinct hand-drawn feel.
- + Follows the prompt's layout request generally.
- − Significant spelling errors and word repetitions (e.g., 'mushroomm', 'fresh fresh', 'Ask's in').
- − The handwriting is inconsistent and becomes messy/unreadable in the second line.
- − Text lines overlap and look cluttered toward the bottom.
Seedream 4.5
- + Excellent text legibility and spelling accuracy throughout the board.
- + Captures the 'chalk texture' perfectly with realistic smudges and dust.
- + Better adherence to the 'elegant cursive' request for the title.
- − Repeats the price '$24' unnecessarily on two lines for the first item.
- − Slightly less depth in the background compared to Model A.
Verdict: Seedream 4.5 is the clear winner as it demonstrates significantly higher text rendering intelligence, avoiding the repetitive and misspelled gibberish found in FLUX1.1 [pro] Ultra. Seedream 4.5 also captures the aesthetic of chalk more realistically, providing the requested variations in size and slant while remaining perfectly legible.
The Reversed Rodeo
Text-to-Image“Horse riding astronaut in space — horse on top, not vice versa. Surreal, highly detailed, cinematic.”
FLUX1.1 [pro] Ultra
Seedream 4.5
AI Judge Analysis
FLUX1.1 [pro] Ultra
- + Excellent high-resolution detail on the horse hair and spacesuit textures.
- + Cinematic lighting consistent with the planetary background.
- + Dynamic composition with a sense of scale and movement.
- − Completely ignored the spatial negative constraint; is a classic astronaut riding a horse.
Seedream 4.5
- + Strong colors and nebula effects provide a surreal atmosphere.
- + Good lighting on the astronaut's visor and suit.
- + Clear action pose with the horse rearing.
- − Ignored the specific prompt instruction to have the horse on top of the astronaut.
Verdict: Both models failed the specific logic test of having the 'horse on top' of the astronaut, instead defaulting to the common trope of an astronaut riding a horse. FLUX1.1 [pro] Ultra is the winner based on superior technical execution, exceptional detail in the textures, and a much more realistic cinematic background compared to the somewhat generic nebula in Seedream 4.5.
The Capybara Taxi Driver
Text-to-Image“Photorealistic scene inside a yellow New York taxi at night. A capybara is driving, wearing a yellow taxi driver cap and a dark jacket. It has a calm, professional expression and both front paws on the steering wheel. In the back seat sits a human businesswoman in a coat, looking at her phone with a completely normal, bored expression (as if this is just another normal ride). Through the windows you can see the streets of Manhattan at night with blurred lights. Realistic taxi interior, photorealistic, detailed fur and fabric, 35mm lens, night lighting with reflections, shallow depth of field.”
FLUX1.1 [pro] Ultra
Seedream 4.5
AI Judge Analysis
FLUX1.1 [pro] Ultra
- + High cinematic visual quality and detailed textures
- + Strong lighting and color palette
- − Failed the spatial instructions by placing the passenger in the front seat holding the steering wheel
- − Anatomical failure with the capybara's arms and positioning
Seedream 4.5
- + Excellent adherence to all layout instructions, including the passenger in the back seat
- + Perfect rendering of a capybara's 'expressionless' look as requested
- + Both front paws are correctly placed on the steering wheel
- − Slightly softer facial details on the human passenger
- − Less cinematic lighting compared to the competitor
Verdict: FLUX1.1 [pro] Ultra failed significantly on the spatial logic of the scene, placing the passenger in the front seat and giving her control of the vehicle. Seedream 4.5 followed the prompt perfectly, accurately placing the businesswoman in the back seat and depicting the capybara as the driver with paws on the wheel.
The Halloween Invitation
Text-to-Image“Vintage gothic Halloween party invitation. Dark parchment poster, spooky border with webs and thorns, central glowing jack-o-lantern, bats, twisted trees, moody night sky. Add elegant gothic title text saying "Halloween Party Invitation", a small scroll banner saying "You are invited to a night of frights", and event details at the bottom: Date: 30.10.2026 Time: 7pm Location: The Arches, NYC Spooky but polished, cinematic lighting, square format.”
FLUX1.1 [pro] Ultra
Seedream 4.5
AI Judge Analysis
FLUX1.1 [pro] Ultra
- + Excellent adherence to the 'parchment' and 'thorn border' prompt elements
- + Sharp, readable gothic typography
- + Perfectly includes all event information
- − Includes a redundant line of distorted text below the banner
- − The Jack-o-lantern looks slightly more like a 2D illustration compared to the 3D environment
Seedream 4.5
- + Beautiful cinematic lighting and atmospheric depth
- + Flawless text rendering with no spelling errors or hallucinations
- + High-quality realistic texture on the jack-o-lantern and trees
- − Missed the request for a dark parchment texture
- − Spider webs are floating in the corners rather than being integrated into a border
Verdict: FLUX1.1 [pro] Ultra followed the stylistic layout instructions more closely, specifically the parchment scroll and thorn border, but suffered from some text repetition errors. Seedream 4.5 produced a much more visually stunning and atmospheric image with perfect text, though it ignored the parchment requirement in favor of a full-scene cinematic look. Seedream 4.5 is the winner for its superior visual polish and error-free text implementation.
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.”
FLUX1.1 [pro] Ultra
Seedream 4.5
AI Judge Analysis
FLUX1.1 [pro] Ultra
- + Excellent typography integrated into the scene's aesthetic
- + Beautiful soft 3D lighting and refined miniature textures
- + Superior composition with a more detailed and professional rendering style
- − Includes some odd non-sushi elements like a ladybug and steaming food which is inaccurate for sushi
- − Text is slightly less bold than requested
Seedream 4.5
- + Followed the 'large bold text' instructions very accurately
- + Very clean, minimal isometric base
- + Realistic salmon texture
- − Text feels like a flat overlay rather than integrated into the 3D scene
- − The diorama base texture is a bit grainy compared to the requested 'refined textures'
- − Composition is very basic and lacks the visual appeal of the competitor
Verdict: FLUX1.1 [pro] Ultra created a much more visually compelling and professionally rendered miniature diorama with beautiful lighting and soft textures. While Seedream 4.5 followed the text weight instructions more precisely, its output feels like a simple stock image with a flat text overlay, whereas FLUX1.1 produced a cohesive artistic scene.
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.”
FLUX1.1 [pro] Ultra
Seedream 4.5
AI Judge Analysis
FLUX1.1 [pro] Ultra
- + Excellent soft lighting and bokeh effect.
- + Consistent artistic style across all four animals.
- + High level of detail in the fur and floral background.
- − The animals appearing sitting in a row fails to capture the 'playfully chasing' and 'tumbling' part of the prompt.
- − The style is more 'Disney-esque' 3D render than 'hyper-photorealistic'.
- − The kitten and fox look very similar in facial structure.
Seedream 4.5
- + Successfully captures the action of 'chasing' and 'tumbling' through dynamic poses.
- + Includes distinct 'god rays' and 'dew sparkles' as requested.
- + Better variety in animal textures, specifically the tabby markings and fluffy fox tail.
- − The fox's eyes are slightly too large and cartoonish compared to the puppy.
- − Some anatomy issues on the kitten's front paws.
- − The puppy's fur looks slightly wet or matted rather than just 'soft and fluffy'.
Verdict: While FLUX1.1 [pro] Ultra has a very clean and pleasing aesthetic, it failed the core instruction of posing the animals in motion, resulting in a static portrait. Seedream 4.5 much more accurately followed the prompt's request for a dynamic scene of the animals chasing butterflies, while also better incorporating the requested weather effects like dew and god rays.
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.”
FLUX1.1 [pro] Ultra
Seedream 4.5
AI Judge Analysis
FLUX1.1 [pro] Ultra
- + Excellent vector illustration style with sophisticated shading
- + Strong balanced composition within a circular emblem
- + Beautiful warm color palette and subtle parchment texture
- − Failed to spell the name correctly, rendering 'Framilian' instead of 'Florian'
Seedream 4.5
- + Perfect text rendering of the brand name 'Caffè Florian'
- + Closer adherence to the 'minimalist' instruction in the prompt
- + Clean execution of the cloche and steam elements
- − The ribbon banner is a bit simple compared to the 'emblem style' request
- − Slightly less 'vintage' feel than the competitor
Verdict: Seedream 4.5 is the clear winner because it correctly spelled the requested brand name, while FLUX1.1 [pro] Ultra hallucinated 'Framilian'. While FLUX1.1 [pro] Ultra produced a more visually intricate emblem, the failure to follow the core text instruction makes it unusable for the prompt's purpose.
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.”
FLUX1.1 [pro] Ultra
Seedream 4.5
AI Judge Analysis
FLUX1.1 [pro] Ultra
- + Excellent visual depth and complex vector styling.
- + Strong usage of NASA-inspired muted color palette.
- + High creative merit in the illustrated lunar surface background.
- − Included significant amounts of gibberish text and spelling errors (e.g., 'THE ABOUT FING IF').
- − Instructional steps are jumbled and do not follow a logical timeline order.
- − Iconography is inconsistent and does not match the prompt's requested sequence.
Seedream 4.5
- + Perfect logical adherence to the requested 6-step sequence.
- + Clean, legible typography with correct spelling (Armstrong, Aldrin, Collins).
- + Consistent vector icons and a highly effective infographic layout.
- − Icon for 'Descent' (Step 5) looks like a satellite rather than the lunar module requested.
- − Composition is a bit more rigid and less artistically dynamic than the competitor.
Verdict: Seedream 4.5 is the clear winner because it actually functions as an infographic, following the requested 6-step timeline with perfect spelling and logical flow. While FLUX1.1 [pro] Ultra has a more sophisticated artistic style, its complete failure to follow the timeline instructions and its heavy use of garbled text make it useless for the intended purpose.
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