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Stability AI Stable Diffusion 3.5 Medium

stability-ai/stable-diffusion-3.5-medium

Stable Diffusion 3.5 Medium is a 2.5B-parameter text-to-image model with the improved MMDiT-X architecture for quality images. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

Hint: You can drag and drop a file or click to upload

If enabled, the output will be encoded into a BASE64 string instead of a URL. This property is only available through the API.

Idle

A tumultuous ocean violently crashing against black reefs as a storm approaches. The sky is filled with dark, heavy clouds, and a bolt of lightning tears across the sky, illuminating the churning waves. The painting is full of dramatic power and emotion, in the style of J.M.W. Turner, emphasizing the sublime and awesome power of nature. The oil paint texture is heavy, and the colors are deep and moody.

Your request will cost $0.035 per run.

For $1 you can run this model approximately 28 times.

One more thing::

ExamplesView all

An elaborate Steampunk-style "Merlion" airship hovers over a Victorian-era Boat Quay. The airship's body is constructed from brass, mahogany, and a complex network of gears and pipes, billowing steam. Below, people in 19th-century gowns and top hats look up in amazement. The scene is filled with retro-futuristic details and imagination. --ar 16:9
A tumultuous ocean violently crashing against black reefs as a storm approaches. The sky is filled with dark, heavy clouds, and a bolt of lightning tears across the sky, illuminating the churning waves. The painting is full of dramatic power and emotion, in the style of J.M.W. Turner, emphasizing the sublime and awesome power of nature. The oil paint texture is heavy, and the colors are deep and moody.
An afternoon scene at the Singapore River, by Boat Quay, with its shophouses and crowds. Painted in an Impressionist style, mimicking the brushwork of Monet, with a focus on capturing light. Short, thick brushstrokes and bright colors, with the reflection of the sun creating sparkling spots on the water's surface. The image is vibrant and slightly blurred, evoking a cheerful and lively atmosphere. --ar 16:9
A serene and magnificent tropical rainforest landscape, with mist-shrouded mountains in the distance. A waterfall cascades from a high cliff into a clear stream. Sunlight filters through the dense canopy, casting a soft glow. The style is detailed and realistic, filled with an idealized and reverent depiction of nature, possessing the epic scale and tranquil atmosphere of the Hudson River School. --ar 16:9
On a wooden table covered with a dark velvet cloth, there is a silver platter filled with tropical fruits (rambutans, mangosteens, mangoes), a parrot, and an exquisite glass goblet. The lighting is soft, and the details are rendered with extreme realism, showcasing the texture and reflection of each object. Possesses the intricate detail and symbolic meaning of the 17th-century Flemish school.
Singapore's Gardens by the Bay depicted in the style of a Japanese Ukiyo-e woodblock print. The giant Supertrees are drawn like traditional pine trees from classic prints, with simple yet powerful lines. The background features a flat, graded sky and stylized clouds. A couple in modern, modified kimonos strolls across a bridge. The image blends traditional art with a modern landmark, mimicking the style of Katsushika Hokusai.

README

Stable Diffusion 3.5 Medium

Generate stunning images from text prompts with Stability AI's Stable Diffusion 3.5 Medium. This versatile model delivers high-quality results for both text-to-image and image-to-image generation, with excellent prompt adherence and artistic flexibility.

Why It Looks Great

  • Strong prompt understanding: Accurately interprets complex, detailed descriptions including style, mood, and composition.
  • Dual mode support: Use text-only for pure generation, or add a reference image for guided transformations.
  • Flexible aspect ratios: Supports multiple output formats for any creative need.
  • Prompt Enhancer: Built-in tool to refine and expand your descriptions for richer results.
  • Reproducible outputs: Use the seed parameter to recreate exact images or explore variations.
  • Balanced quality: Medium model offers an optimal trade-off between speed and visual fidelity.

Parameters

ParameterRequiredDescription
promptYesText description of the image you want to generate.
imageNoOptional reference image for image-to-image generation (upload or URL).
aspect_ratioNoOutput aspect ratio (e.g., 16:9, 1:1, 9:16). Default: 16:9.
seedNoRandom seed for reproducibility. Use -1 for random.
enable_base64_outputNoAPI only: Returns base64 string instead of URL.

How to Use

  1. Write your prompt — describe the image in detail, including subject, style, lighting, and mood.
  2. Use Prompt Enhancer (optional) — click to refine your description for better results.
  3. Add reference image (optional) — upload an image for image-to-image transformation.
  4. Choose aspect ratio — select the format that fits your needs.
  5. Set seed (optional) — use -1 for random, or a specific number for reproducible results.
  6. Run — click the button to generate.
  7. Download — preview and save your generated image.

Pricing

Flat rate per image generation.

OutputCost
Per image$0.035

Examples

Images GeneratedTotal Cost
1$0.035
10$0.35
30$1.05
100$3.50

Best Use Cases

  • Concept Art & Illustration — Generate detailed artwork, landscapes, and character designs.
  • Marketing & Advertising — Create custom visuals for campaigns without stock photos.
  • Creative Exploration — Rapidly iterate on visual ideas and artistic directions.
  • Style Transfer — Transform reference images into new artistic interpretations.
  • Storytelling & Storyboarding — Visualize scenes and narratives with consistent styling.

Example Prompts

  • "A tumultuous ocean violently crashing against black reefs as a storm approaches, dark heavy clouds, lightning illuminating churning waves, dramatic oil painting style"
  • "A cozy coffee shop interior with warm lighting, rain on the windows, vintage furniture, soft atmospheric mood"
  • "Portrait of an astronaut in a field of wildflowers, cinematic lighting, photorealistic, golden hour"
  • "Abstract geometric shapes floating in space, vibrant neon colors, minimalist design"
  • "Ancient temple ruins overgrown with jungle vines, misty atmosphere, rays of sunlight breaking through"

Pro Tips for Best Results

  • Be descriptive — include style references, lighting conditions, color palette, and mood.
  • Mention artistic styles or artists for specific aesthetics (e.g., "in the style of impressionism").
  • Use the Prompt Enhancer to add professional-quality details to simple ideas.
  • For image-to-image, the reference strongly guides composition — choose images with the structure you want.
  • Fix the seed when iterating on prompts to isolate the effect of text changes.
  • Negative concepts can be implied by describing what you do want rather than what you don't.

Notes

  • If using a URL for the reference image, ensure it is publicly accessible.
  • The enable_base64_output option is only available through the API, not the web interface.
  • Generation time may vary based on current queue load.