FLUX.2 [dev] Flash vs Seedream 4.0
Head-to-head across 6 challenges
FLUX.2 [dev] Flash
50.0%
win rate
Ties
16.7%
Seedream 4.0
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
FLUX.2 [dev] Flash
- + Perfect prompt adherence for all spatial relationships.
- + Excellent handling of glass textures and internal reflections.
- + High level of photographic realism with natural lighting and depth of field.
- − The glass cube is slightly dusty/noisy, though this adds to realism.
Seedream 4.0
- + Strong adherence to the core prompt elements.
- + Vibrant colors on the red book and blue sphere.
- + Good capture of soft window light.
- − Perspective issues on the top glass pane where it meets the book.
- − The base of the cube looks like a mirror rather than a simple glass pane on a table.
- − Lower resolution feel compared to the other model.
Verdict: FLUX.2 [dev] Flash produced a significantly more realistic image with superior handling of physics, such as how the glass edges interact with the light and the book. Seedream 4.0 followed the prompt well but struggled with the structural integrity of the cube's top and used a mirrored base that wasn't requested.
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 [dev] Flash
- + Excellent realism with highly detailed skin textures and lifelike hands.
- + Superior lighting and reflections on the wet pavement that match the rainy atmosphere.
- + Accurate motion blur on the background cars while keeping the subject sharp.
- − The bicycle mechanics are slightly nonsensical, with some frame bars and cables merging awkwardly.
- − The 50mm lens effect feels slightly flatter than requested relative to the background.
Seedream 4.0
- + Good adherence to the 'shallow depth of field' and 'motion blur' requests.
- + The composition feels very much like a 'candid street photo' with imperfect framing.
- − The face suffers from significant deformation and lack of clear detail.
- − The bicycle spokes and frame have severe rendering artifacts and structural breaks.
- − General image quality is lower with a slightly digital/blurry film grain texture.
Verdict: FLUX.2 [dev] Flash is the clear winner due to its exceptional rendering of human textures, wet surfaces, and atmospheric lighting. While Seedream 4.0 followed the composition cues of the prompt well, it failed significantly on technical execution, resulting in a distorted face and broken bicycle geometry.
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.”
AI Judge Analysis
FLUX.2 [dev] Flash
- + Excellent text legibility and spelling throughout.
- + Cohesive and symmetrical composition that feels like a professional poster.
- + Includes all requested elements like thorns, webs, and scroll banners accurately.
- − Includes a line of gibberish text 'Hurk: 0369' above the event time.
- − The background trees are somewhat repetitive in shape.
Seedream 4.0
- + Atmospheric cinematic lighting on the jack-o-lantern.
- + The torn parchment aesthetic adds a tactile, vintage feel to the borders.
- + Dynamic placement of bats and twisted trees.
- − Text on the banner is distorted and difficult to read.
- − Composition feels slightly cluttered with the large folded parchment in the bottom right corner.
- − Typography at the bottom is less polished than Model A.
Verdict: FLUX.2 [dev] Flash produced a much more functional invitation with clear, legible text and a structured layout, despite adding one line of hallucinated text. Seedream 4.0 has better atmospheric lighting and texture, but fails on the legibility of the small scroll banner. FLUX.2 is the winner for its superior graphic design quality and clear information delivery.
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 [dev] Flash
- + Perfect text rendering of 'JAPAN' and 'SUSHI'
- + Excellent isometric perspective and clean diorama base
- + High-quality soft textures and realistic lighting
- − The sushi roll construction is slightly illogical with fish draped over a sliced roll
- − Minimal variety in the sushi types presented
Seedream 4.0
- + Good variety of sushi types including nigiri, maki, and gunkan
- + Accurate text and flag icon placement
- + Appealing miniature aesthetic with a more traditional wooden sushi board
- − Slightly lower clarity in the background and shadows compared to Model A
- − Text is a bit tighter and less balanced in the top margin
Verdict: Both models followed the prompt exceptionally well, producing clean 3D isometric designs with accurate text. FLUX.2 [dev] Flash is the winner because its rendering is noticeably sharper, the lighting is more professional, and it perfectly captured the 'ultra-clean' aesthetic requested in the prompt, despite a slightly odd sushi arrangement.
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
FLUX.2 [dev] Flash
- + Excellent fur texture and detail across all animals.
- + Includes all requested animals clearly with a high degree of photorealism.
- + Strong composition with a balanced arrangement of animals and butterflies.
- − Generated an extra bunny, which wasn't specifically requested but fits the theme.
Seedream 4.0
- + Captures the 'tumbling' and 'playful' motion dynamic very well.
- + Effective use of backlighting and sparkling dew drops.
- + Good adherence to the specific animal types requested.
- − Anatomical issues with the fox's legs and paws.
- − The kitten's tail and hind area are poorly defined against the background.
- − Slightly less 'hyper-photorealistic' than Model A, appearing more like a digital painting.
Verdict: FLUX.2 [dev] Flash delivers a much cleaner and more detailed image with superior anatomical accuracy and fur rendering. Seedream 4.0 captures the movement and light of the prompt well but suffers from noticeable AI artifacts in the limbs and blending of the animals. FLUX.2 is the clear winner for its polish and realism.
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 [dev] Flash
- + Captures the flat-vector aesthetic with sophisticated textures and a modern NASA-inspired layout.
- + Excellent adherence to the color palette requests and detailed illustration of the Lunar Module.
- + Very high resolution for the icons and text, making it look like a professional poster design.
- − Layout is somewhat cluttered with redundant labels for 'Descent' and 'Landing'.
- − Includes gibberish text in the 'Saturn V Icon' label and supporting text blocks.
Seedream 4.0
- + Logical, linear timeline layout that is very easy to follow as an infographic.
- + Clean, bold typography that is mostly legible and correctly indexed 1-6.
- + Strict adherence to the 6-step structure requested in the prompt.
- − The art style is a bit too simplistic and cartoonish compared to the requested 'modern' vector look.
- − Text clipping occurs on 'Translunar' (cut off as 'Transl lunar') and 'Tranquility'.
- − Low-quality rendering on some icons, such as the Moon and the landing craft.
Verdict: FLUX.2 [dev] Flash produced a much more visually appealing and professional poster with high-quality vector illustrations and a sophisticated NASA-inspired palette. While Seedream 4.0 followed the 6-step linear structure more logically, its art style is overly simplistic and it suffered from text-clipping issues that diminished its quality as an infographic.
FLUX.2 [dev] Flash
Fast distilled version of Black Forest Labs' FLUX.2 [dev] optimized for speed and cost efficiency.
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