Black Forest Labs' compact, open-source image generation model with sub-second inference, optimized for production and near real-time applications with multi-reference support
Settled by community votes across 13 shared challenges, with an AI judge weighing in on each.
FLUX.2 [klein] 4B
22.3
arena score
#32 of 62 in Text-to-Image
Skill signature
· Text-to-Image
Imagen 4.0 Fast Generate 001
17.7
arena score
#52 of 62 in Text-to-Image
Vote tally
Where the votes landed
FLUX.2 [klein] 4B
0%
win rate
Ties
0%
Imagen 4.0 Fast Generate 001
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.”
FLUX.2 [klein] 4B
Imagen 4.0 Fast Generate 001
AI Judge Analysis
FLUX.2 [klein] 4B
- + Excellent photographic realism with natural lens blur and lighting.
- + Accurately represents a glass cube with realistic thickness and reflections.
- + Perfect spatial arrangement of the plant behind the cube.
- − The blue sphere is solid and matte, lacking the visual interest of glass or resin.
Imagen 4.0 Fast Generate 001
- + The blue sphere has a beautiful translucent glass texture that fits the aesthetic.
- + Sharp detail on the red book cover and succulent leaves.
- − The perspective of the plant behind the glass is slightly confusing/distorted.
- − The lighting on the table surface is a bit harsh compared to the soft window light requested.
Verdict: Both models followed the prompt instructions perfectly. FLUX.2 [klein] 4B is the winner due to its superior photographic quality and more convincing spatial depth, particularly in how the plant appears naturally behind the glass cube. Imagen 4.0's interpretation is very clean, but it feels slightly more digital and less grounded in a real environment.
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.”
FLUX.2 [klein] 4B
Imagen 4.0 Fast Generate 001
AI Judge Analysis
FLUX.2 [klein] 4B
- + Excellent depiction of rain with visible droplets falling and hitting the pavement.
- + Strong adherence to the 'motion blur from passing cars' prompt requirement.
- + Highly realistic skin textures and clothing details.
- − The anatomy of the bicycle is slightly warped around the pedal and chain area.
- − The framing is a bit more centered than requested by 'imperfect framing'.
Imagen 4.0 Fast Generate 001
- + Natural interpretation of 'imperfect framing' by including a foreground frame or window edge.
- + Excellent reflection on the wet pavement.
- + Accurate skin details and facial expression.
- − Failed to include motion blur on the passing cars as requested.
- − The man's hands are mangled and anatomically incorrect, especially the right hand.
- − The rain effect is very subtle compared to the other model.
Verdict: FLUX.2 [klein] 4B is the clear winner for its superior rendering of weather effects and motion, successfully capturing the atmospheric rain and car blur requested. While Imagen 4.0 Fast Generate 001 provides a creative framing choice, it fails on key technical points like hand anatomy and the specific motion blur requirement.
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.”
FLUX.2 [klein] 4B
Imagen 4.0 Fast Generate 001
AI Judge Analysis
FLUX.2 [klein] 4B
- + Excellent adherence to the complex prompt requirements including armor, hair details, and lighting.
- + High-quality textures on the metal engravings and skin details.
- + Perfect execution of bokeh sparks and warm torchlight atmosphere.
- − The facial scars appear somewhat superficial rather than deep battle-worn marks.
Imagen 4.0 Fast Generate 001
- + Natural lighting and foliage textures in a garden setting.
- − Complete failure to follow the prompt; no paladin, armor, or torchlight.
- − Incorrect shot composition, providing a full-body outdoor shot instead of a close portrait.
- − Missing all specific details like braided hair with beads or leather straps.
Verdict: FLUX.2 [klein] 4B perfectly captured every element of the prompt, from the intricate engravings on the armor to the specific lighting and hair details. Imagen 4.0 Fast Generate 001 completely failed the task, producing a random man in a garden that bears no relation to the requested paladin or setting.
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.”
FLUX.2 [klein] 4B
Imagen 4.0 Fast Generate 001
AI Judge Analysis
FLUX.2 [klein] 4B
- + Excellent photo realism and food styling
- + Sophisticated minimalist layout with nice white space
- + High-quality, vibrant photography that looks professional
- − Text consists of random gibberish characters
- − Menu headings like 'MDAINS' and 'FRAZZA' contain typos
Imagen 4.0 Fast Generate 001
- + Clearer section headers like 'APETIERS' and 'MAIN COURSES'
- + Better organizational grid that integrates text and images side-by-side
- + Stronger use of vibrant color accents in the layout design
- − Lower quality food photography with repeated pizza images
- − Significant spelling errors in headers
- − The food images lack variety, focusing almost exclusively on pizza
Verdict: FLUX.2 [klein] 4B produces a much higher quality aesthetic with professional-grade photography that fits the 'casual dining' prompt perfectly, despite the gibberish text. Imagen 4.0 Fast Generate 001 follows the layout prompt more literally by organizing text next to images, but it fails on visual quality by repeating nearly identical pizza images in every slot.
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.”
FLUX.2 [klein] 4B
Imagen 4.0 Fast Generate 001
AI Judge Analysis
FLUX.2 [klein] 4B
- + Excellent photorealistic texture on the meat and bun
- + Effective use of sparks and embers for a sense of motion
- + Good rendering of the currency symbol and price
- − Nonsensical and garbled text for the main title
- − Failed the 'exploded' request as burger components are mostly stacked together
Imagen 4.0 Fast Generate 001
- + Perfect text rendering for all requested phrases
- + Accurately represents the 'exploded' view with suspended components
- + Strong adherence to the fiery, glowing text style requested
- − Slightly lower fidelity on the patty texture compared to model A
- − The lettuce looks a bit less realistic
Verdict: Imagen 4.0 Fast Generate 001 followed the prompt requirements much better, successfully rendering all requested text and the 'exploded' burger layout. In contrast, FLUX.2 [klein] 4B produced gibberish text for the main title and failed to separate the burger components in mid-air.
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.”
FLUX.2 [klein] 4B
Imagen 4.0 Fast Generate 001
AI Judge Analysis
FLUX.2 [klein] 4B
- + Excellent chalk texture with realistic smudges and dust on the board.
- + Consistently elegant cursive style for the menu items as requested.
- + Realistic wood frame with age and texture.
- − Several spelling errors including 'Truffel', 'Musheram', 'Otrpous', and 'daly'.
- − The title has a spacing error in 'S PECIALS'.
Imagen 4.0 Fast Generate 001
- + Perfect spelling on the primary title and first menu item.
- + Clean, legible handwriting style that remains consistent across the board.
- + Properly included the full text of the third item that was cut off in the prompt.
- − The 'Octupus' spelling is incorrect.
- − The handwriting looks a bit more like a digital font than genuine, irregular chalk strokes.
- − Repeated the third menu item twice with slightly different phrasing.
Verdict: FLUX.2 [klein] 4B captures a much more authentic 'chalkboard' aesthetic with believable textures and smudges, though it struggles significantly with spelling. Imagen 4.0 Fast Generate 001 provides much clearer text and fewer typos, but the overall look feels more digitized and less like a physical object in a cozy café. FLUX.2 is preferred for visual realism, while Imagen is better for legible information.
The Reversed Rodeo
Text-to-Image“Horse riding astronaut in space — horse on top, not vice versa. Surreal, highly detailed, cinematic.”
FLUX.2 [klein] 4B
Imagen 4.0 Fast Generate 001
AI Judge Analysis
FLUX.2 [klein] 4B
- + Excellent anatomical detail on the space suit and horse.
- + Strong composition with a sense of scale and atmosphere.
- + Follows the positioning instructions perfectly with the horse on the bottom.
- − The transition between the horse's hooves and the 'dust' on the orbital plane is slightly blurry.
Imagen 4.0 Fast Generate 001
- + Dynamic and powerful pose for the horse.
- + Crisp lighting that creates a cinematic glow behind the subjects.
- + Clean rendering of the nebula and background stars.
- − The astronaut's right leg is anatomically confusing, appearing to blend into the horse's side.
- − Minor artifacts on the horse's back right leg.
Verdict: Both models followed the prompt correctly, producing high-quality cinematic images with the astronaut on top of the horse. FLUX.2 [klein] 4B is the preferred choice because it demonstrates more realistic lighting and better anatomical coherence, whereas Imagen 4.0 Fast Generate 001 has minor issues with leg placement and subject-object blending.
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.”
FLUX.2 [klein] 4B
Imagen 4.0 Fast Generate 001
AI Judge Analysis
FLUX.2 [klein] 4B
- + Excellent photorealism in the lighting and textures of the jacket and fur.
- + Accurately places the passenger in the back seat as requested.
- + Captures a very natural and believable 'bored' expression on the human's face.
- − The vehicle interior feels narrow, more like a hatchback than a professional NYC taxi.
Imagen 4.0 Fast Generate 001
- + The taxi driver cap is more stylized and professional-looking.
- + Strong perspective and depth with the side-on composition.
- + High level of detail in the capybara's fur and the leather upholstery.
- − The passenger appears to be sitting in the front passenger seat or a very cramped middle position, rather than clearly in the back.
- − The capybara's hands/paws look slightly elongated and less natural.
Verdict: FLUX.2 [klein] 4B is the winner because it correctly places the passenger in the back seat, creating a more realistic taxi layout. It also achieves a higher level of photorealism specifically in the lighting on the subjects' faces and the convincing expression of the businesswoman.
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.”
FLUX.2 [klein] 4B
Imagen 4.0 Fast Generate 001
AI Judge Analysis
FLUX.2 [klein] 4B
- + Excellent atmospheric lighting and cinematic quality
- + Highly detailed thorns and spiderweb border
- + Rich, moody textures in the sky and background
- − Severe spelling errors in the main title
- − Omitted 'Time' in the event details and misspelled 'Location'
Imagen 4.0 Fast Generate 001
- + Clearer text rendering with fewer spelling errors
- + Accurately includes all requested prompt components including date, time, and location
- + Clean layout that is easy to read as an invitation
- − Slight spelling error in the word 'Invitation' and banner text
- − Visual style feels more like a 2D illustration than a cinematic cinematic poster
- − Less intricate detail in the thorns and trees compared to Model A
Verdict: FLUX.2 [klein] 4B produces a much more atmospheric and visually compelling image with great textures, but it fails significantly on text accuracy and completeness. Imagen 4.0 Fast Generate 001 adheres much better to the prompt's informational requirements (date, time, location) and maintains a cleaner layout, even though the artistic style is less sophisticated. Imagen 4.0 is the preferred choice for a functional invitation, while FLUX.2 is better purely as a piece of art.
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.”
FLUX.2 [klein] 4B
Imagen 4.0 Fast Generate 001
AI Judge Analysis
FLUX.2 [klein] 4B
- + High textural realism on the salmon and ceramic plate.
- + Excellent lighting and soft shadows.
- − Failed to include the requested 'diorama base'.
- − Spelling error in the text, showing 'SUSH' instead of 'SUSHI'.
- − The flag icon is incorrect, resembling a red and white stripe.
Imagen 4.0 Fast Generate 001
- + Followed all prompt instructions, including the raised diorama base and specific text.
- + Accurate rendering of the Japanese flag icon.
- + Stronger adheres to the isometric 3D cartoon aesthetic requested.
- − Texture on the sushi rice is slightly less realistic compared to Model A.
- − Includes a white border around the square image.
Verdict: Imagen 4.0 Fast Generate 001 is the clear winner as it successfully incorporated every element of the prompt, including the diorama base and accurate text/flags. FLUX.2 [klein] 4B produced a high-quality render of the food itself, but failed on the specific layout requirements and had a spelling error.
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.”
FLUX.2 [klein] 4B
Imagen 4.0 Fast Generate 001
AI Judge Analysis
FLUX.2 [klein] 4B
- + Excellent depiction of god rays and sunrise lighting
- + Very expressive faces and high fur detail
- + Captures the 'playfully chasing' and 'tumbling' motion well
- − Failed to include the baby bunny
- − Includes two kittens instead of a tabby kitten and bunny
- − Slightly more illustrative than hyper-photorealistic
Imagen 4.0 Fast Generate 001
- + Successfully includes all four requested animal species
- + Better source preservation of the 'photorealistic' style
- + Great textures on the bunny and fox
- − Static composition; animals are sitting rather than chasing/tumbling
- − Failed to include any butterflies
- − The dog looks more like a spaniel or different breed than a golden retriever
Verdict: Imagen 4.0 Fast Generate 001 followed the complex character list much better by including the bunny, which FLUX.2 [klein] 4B missed. However, FLUX.2 [klein] 4B much better adhered to the action and lighting cues of the prompt, creating a more dynamic and joyful scene despite the missing animal.
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.”
FLUX.2 [klein] 4B
Imagen 4.0 Fast Generate 001
AI Judge Analysis
FLUX.2 [klein] 4B
- + Strong minimalist aesthetic with a clean vector feel.
- + Accurate interpretation of 'warm brown and cream tones'.
- + Good implementation of the paper texture background.
- − Significant spelling error in the primary brand name ('FLAXTION').
- − Repetitive 'Est. 1720' text appearing both inside and below the banner.
Imagen 4.0 Fast Generate 001
- + Perfect text rendering for both the brand name and the date.
- + Sophisticated composition with elegant framing lines.
- + Highly accurate adherence to the vintage cloche and banner request.
- − Minor artifacting with random small text ('AFFD CARO') above the main name.
- − The background leans slightly blue/cool compared to the 'cream' prompt.
Verdict: While FLUX.2 [klein] 4B captures the minimalist vector style well, it fails significantly on the requested text, misspelling the brand name. Imagen 4.0 Fast Generate 001 produces a much more professional and accurate logo, successfully rendering all required text elements in a balanced, elegant composition despite minor background noise.
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.”
FLUX.2 [klein] 4B
Imagen 4.0 Fast Generate 001
AI Judge Analysis
FLUX.2 [klein] 4B
- + Stronger vector illustration style with a cohesive horizontal ground plane.
- + Includes recognizable silhouettes of the astronauts and a detailed Lunar Module icon.
- + Adheres well to the requested muted NASA-inspired color palette.
- − Text rendering is very poor with several gibberish headings like 'APLLO 1UT 1J'.
- − The layout of the steps is jumbled and doesn't follow a logical timeline.
Imagen 4.0 Fast Generate 001
- + Text rendering is significantly clearer, even if 'APOLLO' is misspelled as 'APOLO'.
- + The diagrammatic layout is clever and uses arrows to indicate a process flow.
- + Very clean, minimalist aesthetic that fits the modern infographic requirement.
- − Missed the Saturn V icon requested for the launch step.
- − Labels for the steps are repetitive or strangely concatenated (e.g., 'MOO + ON + SURFACE').
Verdict: Both models struggled with the specific text and complex multi-step instructions. FLUX.2 [klein] 4B produced more detailed illustrations and better iconography but failed completely on legible text, while Imagen 4.0 Fast Generate 001 created a more professional diagrammatic layout with mostly readable typography. Imagen 4.0 is the preferred choice for a functional infographic style, despite missing the Saturn V rocket illustration.
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