Flux Kontext Pro

Image generationNewAvailable
by Black Forest LabsModel ID: flux-kontext-pro

A state-of-the-art text-based image editing model that delivers high-quality outputs with excellent prompt following and consistent results for transforming images through natural language

Price
$0.048/image
Aspect ratios
1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 4:5, 5:4, 21:9, 9:21, 2:1, 1:2
Input โ†’ output
Text โ†’ Image
Developer
Black Forest Labs
Updated
September 24, 2026
01

Playground

Try Flux Kontext Pro

Input & output

$0.048/image
Try Flux Kontext Pro
Advanced settings (1)
Output
Your image appears here.

This run

$0.048 ยท 4.8 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 Kontext Pro: Make this a 90s cartoonOpen full size
    InputInput

    Prompt

    Make this a 90s cartoon

    Settings

    aspect_ratio
    match_input_image
  • Example output 2 from Flux Kontext Pro: Using this style, a panda astronaut riding a unicornOpen full size
    InputInput

    Prompt

    Using this style, a panda astronaut riding a unicorn

    Settings

    aspect_ratio
    match_input_image
  • Example output 3 from Flux Kontext Pro: Using this style, a bunny, a dog and a cat are having a tea party seated around a small white tableOpen full size
    InputInput

    Prompt

    Using this style, a bunny, a dog and a cat are having a tea party seated around a small white table

    Settings

    aspect_ratio
    match_input_image
03

About Flux Kontext Pro

TL;DRAs of September 24, 2026

Flux Kontext Pro is a model by Black Forest Labs in the Image generation category. On Railwail, Flux Kontext Pro costs $0.048 per image. Supported aspect ratios: 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 4:5, 5:4, 21:9, 9:21, 2:1, and 1:2.

04

Pricing

Prices in US dollars. Usage is charged from prepaid credits.
Per image$0.048 per image
  • 1 credit = $0.01

Cost calculator

Price calculator

Total

$4.80

480 credits

Per run

$0.048 ยท 4.8 credits

Fixed price per run, known before the run starts.

05

API

Call Flux Kontext 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-kontext-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-kontext-pro
Input
Text
Output
Image
Aspect ratios
1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 4:5, 5:4, 21:9, 9:21, 2:1, 1:2
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: โ€“
    Allowed values: โ€“
  • aspectRatio
    Type: Choice
    Default: 1:1
    Allowed values: match_input_image, 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 4:5, 5:4, 21:9, 9:21, 2:1, or 1:2

Tags

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

Use cases

08

Frequently asked questions

What is Flux Kontext Pro?

Flux Kontext 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 Kontext Pro cost on Railwail?

On Railwail, Flux Kontext Pro costs $0.048 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 Kontext Pro support?

According to its input schema, Flux Kontext Pro knows these parameters: prompt and aspectRatio (match_input_image, 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 4:5, 5:4, 21:9, 9:21, 2:1, or 1:2).

How fast is Flux Kontext Pro?

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

Is Flux Kontext Pro better than FLUX 1.1 Pro?

That depends on the task. Flux Kontext 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 Kontext Pro and FLUX 1.1 Pro

How do I use Flux Kontext Pro through the API?

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

09

Comparable models

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Use Flux Kontext Pro via the API

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