Stable Diffusion 3
stable-diffusion-3A text-to-image model with greatly improved performance in image quality, typography, complex prompt understanding, and resource-efficiency
- Price
- $0.042/image
- Aspect ratios
- 1:1, 16:9, 21:9, 3:2, 2:3, 4:5, 5:4, 9:16, 9:21
- Input β output
- Text β Image
- Developer
- Stability AI
- Updated
- September 24, 2026
Playground
Try Stable Diffusion 3
Input & output
This run
$0.042 Β· 4.2 credits
For accounts without a purchase: runs above 2 credits need a top-up.
New here?
10 free credits ($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.
Examples
Open full sizePrompt
a photo of vibrant artistic graffiti on a wall saying "SD3 medium"
Settings
- aspect_ratio
- 3:2
Open full sizePrompt
an epic logo for "STABLE DIFFUSION 3", depicting a space wizard in the style of a nebula background with blue and purple neon text on a white glowing background floating over a mountain range
Settings
negative_prompt: watermark
- aspect_ratio
- 3:2
Open full sizePrompt
a 3D render of a wizard holding a sign saying "SD3"
Settings
- aspect_ratio
- 1:1
About Stable Diffusion 3
Stable Diffusion 3 is a model by Stability AI in the Image generation category. On Railwail, Stable Diffusion 3 costs $0.042 per image. Supported aspect ratios: 1:1, 16:9, 21:9, 3:2, 2:3, 4:5, 5:4, 9:16, and 9:21.
Pricing
| Per image | $0.042 per image |
|---|
- 1 credit = $0.01
Cost calculator
Price calculator
Total
$4.20
420 credits
Per run
$0.042 Β· 4.2 credits
Fixed price per run, known before the run starts.
API
curl https://railwail.com/api/v1/images/generations \
-H "Authorization: Bearer $RAILWAIL_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "stable-diffusion-3",
"prompt": "A lighthouse on a rocky coast at sunset, photorealistic"
}'import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["RAILWAIL_API_KEY"],
base_url="https://railwail.com/api/v1",
)
image = client.images.generate(
model="stable-diffusion-3",
prompt="A lighthouse on a rocky coast at sunset, photorealistic",
)
print(image.data[0].url)import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.RAILWAIL_API_KEY,
baseURL: "https://railwail.com/api/v1",
});
const image = await client.images.generate({
model: "stable-diffusion-3",
prompt: "A lighthouse on a rocky coast at sunset, photorealistic"
});
console.log(image.data[0].url);// npm install railwail
import railwail from "railwail";
const rw = railwail(process.env.RAILWAIL_API_KEY);
const res = await rw.image("stable-diffusion-3", "A lighthouse on a rocky coast at sunset, photorealistic");
console.log(res.data[0].url);Specifications
- Model ID
stable-diffusion-3- Developer
- Stability AI
- Category
- Image generation
- Input
- Text
- Output
- Image
- Aspect ratios
- 1:1, 16:9, 21:9, 3:2, 2:3, 4:5, 5:4, 9:16, 9:21
- Billing
- Fixed price, known before the run
- Catalog entry updated
- September 24, 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.
promptrequiredType: TextDefault: βAllowed values: βaspectRatioType: ChoiceDefault: βAllowed values: 1:1, 16:9, 21:9, 3:2, 2:3, 4:5, 5:4, 9:16, or 9:21
Tags
- replicate
- stability-ai
- text-to-image
Use cases
Frequently asked questions
What is Stable Diffusion 3?
Stable Diffusion 3 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 cost on Railwail?
On Railwail, Stable Diffusion 3 costs $0.042 per image. The price is known before the run starts. Usage is paid from prepaid credits; 1 credit equals $0.01.
Which settings does Stable Diffusion 3 support?
According to its input schema, Stable Diffusion 3 knows these parameters: prompt and aspectRatio (1:1, 16:9, 21:9, 3:2, 2:3, 4:5, 5:4, 9:16, or 9:21).
How fast is Stable Diffusion 3?
There are not enough measured runs of Stable Diffusion 3 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 better than FLUX 1.1 Pro?
That depends on the task. Stable Diffusion 3 (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 and FLUX 1.1 ProHow do I use Stable Diffusion 3 through the API?
Create a Railwail API key and send your request with the model ID stable-diffusion-3. Code examples for curl, Python and JavaScript are in the API section of this page.
Comparable models
All in this category- FLUX 1.1 ProBlack Forest Labs
Black Forest Labs' flagship text-to-image model. Faster generation than FLUX.1 Pro at higher prompt adherence, with strong photorealism and reliable spatial composition. Runs as a hosted Replicate model.
- Flux 1.1 Pro UltraBlack Forest Labs
FLUX 1.1 Pro in ultra mode. Up to 4 megapixel images with raw mode for photorealism.
- Flux DevBlack Forest Labs
Black Forest Labs' development model. Fast, high-quality image generation with LoRA support.
Use Stable Diffusion 3 via the API
One API key for every model on Railwail. Usage is charged from prepaid credits, 1 credit = $0.01.