Flux Pro

Image generationNewAvailable
by Black Forest LabsModel ID: flux-pro

State-of-the-art image generation with top of the line prompt following, visual quality, image detail and output diversity.

Price
$0.066/image
Aspect ratios
1:1, 16:9, 3:2, 2:3, 4:5, 5:4, 9:16, 3:4, 4:3
Input β†’ output
Text β†’ Image
Developer
Black Forest Labs
Updated
September 24, 2026
01

Playground

Try Flux Pro

Input & output

$0.066/image
Try Flux Pro
Advanced settings (1)
Output
Your image appears here.

This run

$0.066 Β· 6.6 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.

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 Pro: The world's largest black forest cake, the size of a building, surrounded by trees of the black forestOpen full size

    Prompt

    The world's largest black forest cake, the size of a building, surrounded by trees of the black forest

    Settings

    width
    1024
    height
    1024
  • Example output 2 from Flux Pro: Elevated view of a quaint 18th-century German village in the Black Forest, captured with a fisheye lens. The scene shows a group of cheerfulOpen full size

    Prompt

    Elevated view of a quaint 18th-century German village in the Black Forest, captured with a fisheye lens. The scene shows a group of cheerful villagers in period attire gathered in the town square, enjoying slices of Black Forest cake and mugs of beer. The distorted wide-angle view encompasses thatched-roof houses, surrounding forest, and perhaps a church spire, giving a sense of the village nestled in the broader landscape.

    Settings

    width
    1024
    height
    512
  • Example output 3 from Flux Pro: A dark-haired woman in her early thirties playing the piano accordion in the middle of an octagonal wooden dance floor with a wooden roof inOpen full size

    Prompt

    A dark-haired woman in her early thirties playing the piano accordion in the middle of an octagonal wooden dance floor with a wooden roof in the swedish forest, surrounded by dancers dancing in pairs

    Settings

    width
    1024
    height
    1024
03

About Flux Pro

TL;DRAs of September 24, 2026

Flux Pro is a model by Black Forest Labs in the Image generation category. On Railwail, Flux Pro costs $0.066 per image. Supported aspect ratios: 1:1, 16:9, 3:2, 2:3, 4:5, 5:4, 9:16, 3:4, and 4:3.

04

Pricing

Prices in US dollars. Usage is charged from prepaid credits.
Per image$0.066 per image
  • 1 credit = $0.01

Cost calculator

Price calculator

Total

$6.60

660 credits

Per run

$0.066 Β· 6.6 credits

Fixed price per run, known before the run starts.

05

API

Call Flux Pro 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-pro",
    "prompt": "A lighthouse on a rocky coast at sunset, photorealistic"
  }'
Set your key as RAILWAIL_API_KEYCreate API key
06

Specifications

Model ID
flux-pro
Input
Text
Output
Image
Aspect ratios
1:1, 16:9, 3:2, 2:3, 4:5, 5:4, 9:16, 3:4, 4:3
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: custom, 1:1, 16:9, 3:2, 2:3, 4:5, 5:4, 9:16, 3:4, or 4:3

Tags

  • replicate
  • black-forest-labs
  • text-to-image
07

Use cases

08

Frequently asked questions

What is Flux Pro?

Flux Pro is a model by Black Forest Labs in the Image generation category. On Railwail you can call it with an API key through the Railwail API.

How much does Flux Pro cost on Railwail?

On Railwail, Flux Pro costs $0.066 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 Pro support?

According to its input schema, Flux Pro knows these parameters: prompt and aspectRatio (custom, 1:1, 16:9, 3:2, 2:3, 4:5, 5:4, 9:16, 3:4, or 4:3).

How fast is Flux Pro?

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

Is Flux Pro better than FLUX 1.1 Pro?

That depends on the task. Flux Pro (Black Forest Labs) 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 Pro and FLUX 1.1 Pro

How do I use Flux Pro through the API?

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

09

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Use Flux Pro via the API

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