Stable Diffusion 3.5 Large

Image generationAvailable
by Stability AIModel ID: stable-diffusion-3-5-large

Stability AI's 8B MMDiT-based flagship. Open weights at 1MP with improved typography and prompt adherence over SDXL. The largest model in the SD 3.5 release line.

Price
US$0.078/image
Aspect ratios
1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3
Input โ†’ output
Text โ†’ Image
Developer
Stability AI
Updated
September 23, 2026
01

Playground

Try Stable Diffusion 3.5 Large

Input & output

US$0.078/image
Try Stable Diffusion 3.5 Large

0 / 2,000

What to generate

Advanced settings (4)

Optional seed for reproducibility

Output
Your image appears here.

This run

US$0.078 ยท 7.8 credits

For accounts without a purchase: runs above 2 credits need a top-up.

New here?

10 free credits (US$0.10) when you sign up with Google

Usable 24 hours after sign-up, up to 5 runs per day and at most 2 credits per run. Other sign-in methods start without credits.

02

Examples

Real outputs from the public examples of this model on Replicate, with the prompt and settings that produced them. They were not generated live on this page.
  • Example output 1 from Stable Diffusion 3.5 Large: ~*~aesthetic~*~ #boho #fashion, full-body 30-something woman laying on microfloral grass, candid pose, overlay reads Stable Diffusion 3.5, cOpen full size

    Prompt

    ~*~aesthetic~*~ #boho #fashion, full-body 30-something woman laying on microfloral grass, candid pose, overlay reads Stable Diffusion 3.5, cheerful cursive typography font

    Settings

    aspect_ratio
    1:1
  • Example output 2 from Stable Diffusion 3.5 Large: a portrait of a man standing in front of a white wall. His gaze is directed to the right, looking towards something beyond the frameOpen full size

    Prompt

    a portrait of a man standing in front of a white wall. His gaze is directed to the right, looking towards something beyond the frame

    Settings

    aspect_ratio
    1:1
  • Example output 3 from Stable Diffusion 3.5 Large: a captivating anime-style illustration of a young woman in a white astronaut suit. She has long, dark wavy hair. Surrounding the astronaut aOpen full size

    Prompt

    a captivating anime-style illustration of a young woman in a white astronaut suit. She has long, dark wavy hair. Surrounding the astronaut are vibrant orange flowers with yellow centers. The background itself is a mesmerizing night sky filled with countless stars

    Settings

    aspect_ratio
    1:1
03

About Stable Diffusion 3.5 Large

TL;DRAs of September 23, 2026

Stable Diffusion 3.5 Large is a model by Stability AI in the Image generation category. On Railwail, Stable Diffusion 3.5 Large costs US$0.078 per image. Supported aspect ratios: 1:1, 16:9, 9:16, 4:3, 3:4, 3:2 and 2:3.

Stable Diffusion 3.5 Large is an 8 billion parameter Multimodal Diffusion Transformer (MMDiT) from Stability AI. It generates 1 megapixel images, renders text more reliably than earlier SD versions, and ships with open weights under the Stability Community License. It is the quality-first member of the SD 3.5 lineup, paired with a Turbo variant for speed.
04

Pricing

Prices in US dollars. Usage is charged from prepaid credits.
Per imageUS$0.078 per image
  • 1 credit = US$0.01

Cost calculator

Price calculator

Total

US$7.80

780 credits

Per run

US$0.078 ยท 7.8 credits

Fixed price per run, known before the run starts.

05

API

Call Stable Diffusion 3.5 Large with your Railwail API key. Use this model ID in the request:
stable-diffusion-3-5-largeAPI documentationGet an API key
curl https://railwail.com/api/v1/images/generations \
  -H "Authorization: Bearer $RAILWAIL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "stable-diffusion-3-5-large",
    "prompt": "A lighthouse on a rocky coast at sunset, photorealistic"
  }'
Set your key as RAILWAIL_API_KEYCreate API key
06

Specifications

Model ID
stable-diffusion-3-5-large
Developer
Stability AI
Input
Text
Output
Image
Output formats
WEBP, PNG, JPG
Aspect ratios
1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3
Billing
Fixed price, known before the run
Catalog entry updated
September 23, 2026

Input parameters

Inputs and settings from the model's input schema. The example in the API section shows which of them the API accepts.

  • cfg
    Type: Number
    Default: 3.5
    Allowed values: 0 to 20
  • seed

    Optional seed for reproducibility

    Type: Integer
    Default: โ€“
    Allowed values: โ€“
  • steps
    Type: Integer
    Default: 35
    Allowed values: 1 to 50
  • prompt

    What to generate

    Type: Text
    Default: โ€“
    Allowed values: up to 2,000 characters
  • aspect_ratio
    Type: Choice
    Default: 1:1
    Allowed values: 1:1, 16:9, 9:16, 4:3, 3:4, 3:2 or 2:3
  • output_format
    Type: Choice
    Default: webp
    Allowed values: webp, png or jpg

Tags

  • replicate
  • stability-ai
  • stable-diffusion
  • text-to-image
  • open-weights
  • flagship
07

Use cases

08

Frequently asked questions

What is Stable Diffusion 3.5 Large?

Stable Diffusion 3.5 Large is a model by Stability AI in the Image generation category. On Railwail you can call it with an API key through the Railwail API.

How much does Stable Diffusion 3.5 Large cost on Railwail?

On Railwail, Stable Diffusion 3.5 Large costs US$0.078 per image. The price is known before the run starts. Usage is paid from prepaid credits; 1 credit equals US$0.01.

Which settings does Stable Diffusion 3.5 Large support?

According to its input schema, Stable Diffusion 3.5 Large knows these parameters: cfg (0 to 20), seed, steps (1 to 50), prompt (up to 2,000 characters), aspect_ratio (1:1, 16:9, 9:16, 4:3, 3:4, 3:2 or 2:3) and output_format (webp, png or jpg).

How fast is Stable Diffusion 3.5 Large?

There are not enough measured runs of Stable Diffusion 3.5 Large on Railwail yet to state a run time. It depends on the input, the settings and the load at the provider.

Is Stable Diffusion 3.5 Large better than FLUX 1.1 Pro?

That depends on the task. Stable Diffusion 3.5 Large (Stability AI) and FLUX 1.1 Pro (Black Forest Labs) are both models in the Image generation category. The comparison page shows their prices and specifications side by side.

Compare Stable Diffusion 3.5 Large and FLUX 1.1 Pro

How do I use Stable Diffusion 3.5 Large through the API?

Create a Railwail API key and send your request with the model ID stable-diffusion-3-5-large. Code examples for curl, Python and JavaScript are in the API section of this page.

09

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Use Stable Diffusion 3.5 Large via the API

One API key for every model on Railwail. Usage is charged from prepaid credits, 1 credit = US$0.01.