Flux Fast

Image generationNewAvailable
by CommunityModel ID: flux-fast

This 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
01

Playground

Try Flux Fast

Input & output

$0.0060/image
Try Flux Fast
Advanced settings (1)
Output
Your image appears here.

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.

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 Flux Fast: a man staring into the sunsetOpen full size

    Prompt

    a man staring into the sunset

    Settings

    aspect_ratio
    1:1
  • Example output 2 from Flux Fast: a catOpen full size

    Prompt

    a cat

    Settings

    aspect_ratio
    1:1
  • Example output 3 from Flux Fast: black forest gateau cake spelling out the words "FLUX DEV", tasty, food photography, dynamic shotOpen full size

    Prompt

    black forest gateau cake spelling out the words "FLUX DEV", tasty, food photography, dynamic shot

    Settings

    aspect_ratio
    1:1
03

About Flux Fast

TL;DRAs of September 24, 2026

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.

04

Pricing

Prices in US dollars. Usage is charged from prepaid credits.
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.

05

API

Call Flux Fast with your Railwail API key. Use this model ID in the request:
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"
  }'
Set your key as RAILWAIL_API_KEYCreate API key
06

Specifications

Model ID
flux-fast
Developer
Community
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.

  • promptrequired
    Type: Text
    Default: –
    Allowed values: –
  • aspectRatio
    Type: Choice
    Default: –
    Allowed 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
07

Use cases

08

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 Pro

How 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.

09

Comparable models

All in this category

Use Flux Fast via the API

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