Flux Fast
flux-fastThis is the fastest Flux endpoint in the world.
- Price
- $0.0060/image
- Aspect ratios
- 1:1, 16:9, 21:9, 3:2, 2:3, 4:5, 5:4, 3:4, 4:3, 9:16, 9:21
- Input β output
- Text β Image
- Developer
- Community
- Updated
- September 24, 2026
Playground
Try Flux Fast
Input & output
This run
$0.006 Β· 0.6 credits
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. Enough for 16 runs of this model.
Examples
Open full sizePrompt
a man staring into the sunset
Settings
- aspect_ratio
- 1:1
Open full sizePrompt
a cat
Settings
- aspect_ratio
- 1:1
Open full sizePrompt
black forest gateau cake spelling out the words "FLUX DEV", tasty, food photography, dynamic shot
Settings
- aspect_ratio
- 1:1
About Flux Fast
Flux Fast is a model by Community in the Image generation category. On Railwail, Flux Fast costs $0.0060 per image. Supported aspect ratios: 1:1, 16:9, 21:9, 3:2, 2:3, 4:5, 5:4, 3:4, 4:3, 9:16, and 9:21.
Pricing
| Per image | $0.0060 per image |
|---|
- 1 credit = $0.01
Cost calculator
Price calculator
Total
$0.60
60 credits
Per run
$0.006 Β· 0.6 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": "flux-fast",
"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="flux-fast",
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: "flux-fast",
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("flux-fast", "A lighthouse on a rocky coast at sunset, photorealistic");
console.log(res.data[0].url);Specifications
- Model ID
flux-fast- Developer
- Community
- Category
- Image generation
- Input
- Text
- Output
- Image
- Aspect ratios
- 1:1, 16:9, 21:9, 3:2, 2:3, 4:5, 5:4, 3:4, 4:3, 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, 3:4, 4:3, 9:16, or 9:21
Tags
- replicate
- prunaai
- text-to-image
Use cases
Frequently asked questions
What is Flux Fast?
Flux Fast is a model by Community in the Image generation category. On Railwail you can call it with an API key through the Railwail API.
How much does Flux Fast cost on Railwail?
On Railwail, Flux Fast costs $0.0060 per image. The price is known before the run starts. Usage is paid from prepaid credits; 1 credit equals $0.01.
Which settings does Flux Fast support?
According to its input schema, Flux Fast knows these parameters: prompt and aspectRatio (1:1, 16:9, 21:9, 3:2, 2:3, 4:5, 5:4, 3:4, 4:3, 9:16, or 9:21).
How fast is Flux Fast?
There are not enough measured runs of Flux Fast on Railwail yet to state a run time. It depends on the input, the settings and the load at the provider.
Is Flux Fast better than FLUX 1.1 Pro?
That depends on the task. Flux Fast (Community) 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 Flux Fast and FLUX 1.1 ProHow do I use Flux Fast through the API?
Create a Railwail API key and send your request with the model ID flux-fast. 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 Flux Fast via the API
One API key for every model on Railwail. Usage is charged from prepaid credits, 1 credit = $0.01.