Evaluating Stable Diffusion 3 Large vs. Medium with Prompt Challenges

Summary

[View all images generated in this test]

In this article I evaluate how well SD3 Medium and SD3 large handle different prompt challenges. My results show that for most challenges they show similar results. But when it comes to Style, Perspective and Imagination SD3 Large is a clear winner.

To conduct the test I used a subset of Parti Prompts (prompts designed by the engineers at Google to evaluate image generation models).

I tested over 100 prompts, each prompt tests a specific challenge. I then rated all images, gathered showcases and here are the results.

List of challenges:

Grid: Challenge: Basic
Insights
SD3 Large
SD3 Medium

SD3 Medium is doing as good as SD3 Large at handling basic prompts and understanding basic world concepts.

The Basic challenge in Parti Prompts primarily tests how effectively image generation models can interpret and execute simple tasks. These tasks often consist of basic shapes, colors, and compositions. They serve as a litmus test on how well a model understands fundamental visual concepts and can replicate them accurately.

Image Size:
seed
z
100
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x
__model
prompt
Stable Diffusion 3 Large
Stable Diffusion 3 Medium
A bowl of Pho
No Image
No Image
Salvador Dalí
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The Starry Night
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U.S. 101
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a fall landscape
No Image
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a kitchen
No Image
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a shiba inu
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a walnut
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an F1
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an espresso machine
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bond
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parallel lines
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Grid: Challenge: Simple Details
Insights
SD3 Large
SD3 Medium

SD3 Large and SD3 Medium are doing good and equal job at handling slightly more intricate prompts.

The Simple Details test in Parti Prompts is designed to evaluate how efficiently an image generation model can handle tasks that are slightly more intricate than the basics. These tasks typically involve rendering detailed objects, textures, or patterns, or carrying out instructions that have different steps or components. The test gives an idea of the models ability to handle complexity while maintaining accuracy in image generation.

Image Size:
seed
z
100
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__model
prompt
Stable Diffusion 3 Large
Stable Diffusion 3 Medium
A bowl of Chicken Pho
No Image
No Image
A green heart
No Image
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A living area with a television and a table
No Image
No Image
A shiny VW van parked on grass.
No Image
No Image
A van parked on grass
No Image
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Siberian husky playing the piano.
No Image
No Image
a baby daikon radish
No Image
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a farm scene with cows, ducks and a tractor.
No Image
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a lavender backpack with a triceratops stuffed animal head on top
No Image
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a team playing baseball
No Image
No Image
Grid: Challenge: Complex
Insights
SD3 Large
SD3 Medium

Although SD3 Large shows a slight improvement, Medium is not too bad at all at handling complex prompts.

This test involves tasks that are highly intricate or require a high level of detail. The complexity could be in terms of intricate designs or complex instructions to replicate.

Image Size:
seed
z
100
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x
__model
prompt
Stable Diffusion 3 Large
Stable Diffusion 3 Medium
A dignified beaver wearing glasses, a vest, and colorful neck tie. He stands next to a tall stack of books in a library.
No Image
No Image
A photo of a hamburger fighting a hot dog in a boxing ring. The hot dog is tired and up against the ropes.
No Image
No Image
A photograph of the inside of a subway train. There are frogs sitting on the seats. One of them is reading a newspaper. The window shows the river in the background.
No Image
No Image
A robot painted as graffiti on a brick wall. The words "Fly an airplane" are written on the wall. A sidewalk is in front of the wall, and grass is growing out of cracks in the concrete.
No Image
No Image
A set of 2x2 emoji icons with happy, angry, surprised and sobbing faces. The emoji icons look like dogs. All of the dogs are wearing blue turtlenecks.
No Image
No Image
A solitary figure shrouded in mists peers up from the cobble stone street at the imposing and dark gothic buildings surrounding it. an old-fashioned lamp shines nearby. oil painting.
No Image
No Image
A wall in a royal castle. There are two paintings on the wall. The one on the left a detailed oil painting of the royal raccoon king. The one on the right a detailed oil painting of the royal raccoon queen. A cute dog looking at the two paintings, holding a sign saying 'plz conserve'
No Image
No Image
Greek statue of a man comforting a cat. The cat has a big head. The man looks angry.
No Image
No Image
Horses pulling a carriage on the moon's surface, with the Statue of Liberty and Great Pyramid in the background. The Planet Earth can be seen in the sky.
No Image
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a photograph of a fiddle next to a basketball on a ping pong table
No Image
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a tree reflected in the hood of a blue car
No Image
No Image
Grid: Challenge: Fine grained detail
Insights
SD3 Large
SD3 Medium

Depending on the prompt SD3 large can do a better job, but overall medium is as good.

This test deals with tasks that require the model to generate an image with a high level of detail. This could be in terms of creating very realistic images, replicating detailed textures, or creating images with a lot of elements.

Image Size:
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100
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__model
prompt
Stable Diffusion 3 Large
Stable Diffusion 3 Medium
A bare kitchen has wood cabinets and white appliances
No Image
No Image
A punk rock squirrel in a studded leather jacket shouting into a microphone while standing on a stump
No Image
No Image
A sunken ship becomes the homeland of fish.
No Image
No Image
A table full of food. There is a plate of chicken rice, a bowl of bak chor mee, and a bowl of laksa.
No Image
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A teddy bear wearing a motorcycle helmet and cape is standing in front of Loch Awe with Kilchurn Castle behind him
No Image
No Image
a baby daikon radish in a tutu walking a dog
No Image
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a kids' book cover with an illustration of white dog driving a red pickup truck
No Image
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a photograph of the mona lisa drinking coffee as she has her breakfast. her plate has an omelette and croissant.
No Image
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a young badger delicately sniffing a yellow rose, richly textured oil painting
No Image
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fairy cottage with smoke coming up chimney and a squirrel looking from the window
No Image
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purple lego dollhouse with a pool and a swing
No Image
No Image
Grid: Challenge: Imagination
Insights
SD3 Large
SD3 Medium

We can say both models are imaginative equally but SD3 Large outputs quality is superior

This test involves imaginative tasks where the image generation model needs to create unique, non-existing concepts based on the instruction given.

Image Size:
seed
z
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__model
prompt
Stable Diffusion 3 Large
Stable Diffusion 3 Medium
A giant cobra snake made from corn
No Image
No Image
A group of farm animals (cows, sheep, and pigs) made out of cheese and ham, on a wooden board. There is a dog in the background eyeing the board hungrily.
No Image
No Image
A horse sitting on an astronaut's shoulders.
No Image
No Image
A large city fountain that has milk instead of water. Several cats are leaning into the fountain.
No Image
No Image
A shiny robot wearing a race car suit and black visor stands proudly in front of an F1 race car. The sun is setting on a cityscape in the background. comic book illustration.
No Image
No Image
A television made of water that displays an image of a cityscape at night.
No Image
No Image
A tornado made of sharks crashing into a skyscraper. painting in the style of Hokusai.
No Image
No Image
The 1970s logo for a london-area football club called "The Rumbury Wanderers"
No Image
No Image
The collision of two black holes in the center of a galaxy.
No Image
No Image
a baby daikon radish in a tutu
No Image
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a dump truck filled with soccer balls scuba diving in a coral reef.
No Image
No Image
a small kitchen with a white goat in it
No Image
No Image
Grid: Challenge: Linguistics
Insights
SD3 Large
SD3 Medium

Both models don't yet understand the concept of NO, so you better use the negative prompt wisely.

This test involves tasks that require understanding of language. The model would need to recognize words, phrases or even sentences and generate relevant images accordingly.

Image Size:
seed
z
100
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x
__model
prompt
Stable Diffusion 3 Large
Stable Diffusion 3 Medium
A bird gives an apple to a squirrel
No Image
No Image
An aerial view of Ha Long Bay without any boats
No Image
No Image
The raft floated down the river sank.
No Image
No Image
a bookshelf without any books on it
No Image
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a concert without any fans
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a kitchen without a refrigerator
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a plate that has no bananas on it. there is a glass without orange juice next to it.
No Image
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a street without vehicles
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a summer tree without any leaves
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supercalifragilisticexpialidocious
No Image
No Image
Grid: Challenge: perspective
Insights
SD3 Large
SD3 Medium

Huge win for SD3 Large, SD3 Medium is doing poorly.

This test involves tasks that require understanding of perspective and depth. The image generation model would need to generate images that show a clear understanding of dimensions, distance and perspective.

Image Size:
seed
z
100
200
x
__model
prompt
Stable Diffusion 3 Large
Stable Diffusion 3 Medium
A robot with a black visor and the number 42 on its chest. It stands proudly in front of an F1 race car. The sun is setting on a cityscape in the background. wide-angle view. comic book illustration.
No Image
No Image
A smiling sloth is wearing a leather jacket, a cowboy hat, a kilt and a bowtie. The sloth is holding a quarterstaff and a big book. The sloth is standing on grass a few feet in front of a shiny VW van with flowers painted on it. wide-angle lens from below.
No Image
No Image
Saturn rises on the horizon.
No Image
No Image
Three-quarters front view of a blue 1977 Corvette coming around a curve in a mountain road and looking over a green valley on a cloudy day.
No Image
No Image
Zoomed out view of a giraffe and a zebra in the middle of a field covered with colorful flowers
No Image
No Image
a close up of a handpalm with leaves growing from it
No Image
No Image
a close-up of a bloody mary cocktail
No Image
No Image
a cross-section view of a walnut
No Image
No Image
long shards of a broken mirror reflecting the eyes of a great horned owl
No Image
No Image
Grid: Challenge: Properties and Positioning
Insights
SD3 Large
SD3 Medium

Both models are doing OK here

This test focuses on the models ability to understand the properties of different objects and their positioning in the generated image.

Image Size:
seed
z
100
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x
__model
prompt
Stable Diffusion 3 Large
Stable Diffusion 3 Medium
A photo of a Persian Metal Engraving vase sitting to the left of a bunch of orange flowers.
No Image
No Image
a green pepper to the left of a red pepper
No Image
No Image
a stack of three red cubes with a blue sphere on the right and two green cones on the left
No Image
No Image
a white flag with a red circle next to a solid blue flag
No Image
No Image
Grid: Challenge: Quantity
Insights
SD3 Large
SD3 Medium

SD3 Large doesn't show a clear advantage when it comes to prompts involving quantities

This test involves tasks that check for the models ability to count and distinguish between different quantities.

Image Size:
seed
z
100
200
x
__model
prompt
Stable Diffusion 3 Large
Stable Diffusion 3 Medium
Four dragons surrounding a dinosaur
No Image
No Image
Times Square with thousands of dogs running around
No Image
No Image
a bunch of laptops piled on a sofa
No Image
No Image
ten red apples
No Image
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the hands of a single person holding a basketball
No Image
No Image
three airplanes parked in a row at a terminal
No Image
No Image
three green peppers
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two baseballs to the left of three tennis balls
No Image
No Image
two parallel chemtrails in blue sky
No Image
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two red boxes
No Image
No Image
Grid: Challenge: Style & Format
Insights
SD3 Large
SD3 Medium

SD3 Large is doing just slightly better here and produces better good looking results.

The Style & Format test is designed to check the models ability to understand and replicate various styles and formats in the generated images.

Image Size:
seed
z
100
200
x
__model
prompt
Stable Diffusion 3 Large
Stable Diffusion 3 Medium
A photo of a dragonfly made of water.
No Image
No Image
A photo of a lotus flower made of water.
No Image
No Image
A rusty spaceship blasts off in the foreground. A city with tall skyscrapers is in the distance, with a mountain and ocean in the background. A dark moon is in the sky. realistic high-contrast anime illustration.
No Image
No Image
Oil painting generated by artificial intelligence
No Image
No Image
a painting of a white country home with a wrap-around porch
No Image
No Image
a painting of the food of china
No Image
No Image
a satellite image of a costal french city there is a large park on the west side and a mountain to the north. There is a cloud covering part of the image
No Image
No Image
an abstract oil painting in deep red and black with a thick patches of white
No Image
No Image
close-up portrait of a smiling businesswoman holding a cell phone, oil painting in the style of Rembrandt
No Image
No Image
Grid: Challenge: Writing & Symbols
Insights
SD3 Large
SD3 Medium

Both models are doing good job handling prompts that involve writing text and signs, you might need to generate many seeds until you get your desired results though

This test tasks involve interpretation of written instructions or generation of images containing some form of writing or symbols.

Image Size:
seed
z
100
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x
__model
prompt
Stable Diffusion 3 Large
Stable Diffusion 3 Medium
A glass of red wine tipped over on a couch, with a stain that writes "OOPS" on the couch.
No Image
No Image
A green sign that says "Very Deep Learning" and is at the edge of the Grand Canyon.
No Image
No Image
A sign that says Deep Learning
No Image
No Image
Portrait of a tiger wearing a train conductor's hat and holding a skateboard that has a yin-yang symbol on it. charcoal sketch
No Image
No Image
Two cups of coffee, one with latte art of a lovely princess. The other has latte art of a frog.
No Image
No Image
a boat with 'BLUE GROOVE' written on its hull
No Image
No Image
graffiti spelling BE KIND on white subway tile
No Image
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the saying "BE EXCELLENT TO EACH OTHER" on a rough wall with a graffiti image of a green alien wearing a tuxedo.
No Image
No Image