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FLUX.1 Kontext [pro]

bfl/flux-2/kontext/pro/multi

Flux 2 Kontext Pro by BFL - AI-powered image editing, style transfer, and transformation. Edit photos with natural language instructions, remove backgrounds, change styles, and enhance images effortlessly.

Use in agentGet API key
Base price
$0.04USD / run
Execution
async
Model type
image
Input fields
6

Try the model

Playground

Open playground
Input
The prompt to generate an image from.

PNG, JPEG, WebP, or GIF · 20 MiB maximum each

Image prompt for the omni model.
120
The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt when looking for a related image to show you. Range: 1 to 20.
The format of the generated image. Allowed values: jpeg, png.
The aspect ratio of the generated image. Allowed values: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16.
The same seed and the same prompt given to the same version of the model will output the same image every time.
OutputReady

Your output will appear here

Complete the inputs, then click Run.

Specifications

Pricing

Base price
$0.04 / run

Context & modalities

Input
Schema-defined
Output
image

Capabilities

Chat
Not supported
Vision
Not supported
Reasoning
Not supported
Structured output
Not supported
Function calling
Not supported
Audio input
Not supported

Access

Provider
BFL
Model ID
bfl/flux-2/kontext/pro/multi
Execution
async
API
Unified Run API
Endpoint
/v1/run

API README

FLUX.1 Kontext [pro]

FLUX.1 Kontext [pro] Multi revises and enhances photos through natural-language direction. It accepts multiple image inputs, allowing a creative brief to combine visual references with a written prompt in a single edit.

Guidance is adjustable from 1 to 20, and the output can be framed in ten aspect ratios. JPEG or PNG selection and seed control support repeated production runs after the preferred edit has been chosen.

Highlights

Reference-rich photo editing. Bring multiple images into one revision when the brief depends on more than one visual cue.

Prompt-led changes. Describe the intended edit in natural language while the supplied images anchor the visual context.

Enhancement workflow. Refine an existing asset without discarding the imagery that establishes its subject.

Practical output controls. Set guidance from 1–20, choose among ten aspect ratios, export JPEG or PNG, and preserve a seed.

Pricing

Billing unitPrice
Per request$0.04

When to Use

✅ Good fit❌ Consider alternatives
The model's named workflow matches the source material and intended outputA different input modality or model route is required
A managed asynchronous result is suitable for the production pipelineA synchronous, interactive editor is essential
The documented controls cover the required duration, framing, or formatThe project needs controls outside this endpoint's schema
Creative iteration benefits from a repeatable request structureExact deterministic pixels, frames, geometry, or samples are mandatory
A finished downloadable media asset is the desired deliverableEditable source layers or a native project file are required

Prompt Guide

For generation, state the intended result first, then add the subject or source treatment, progression, style, and delivery constraints. Keep one creative variable per phrase, use the documented field names for controls, and change one setting at a time when comparing results.

{
  "aspect_ratio": "21:9",
  "images": [
    "https://example.com/reference-1.png",
    "https://example.com/reference-2.png"
  ],
  "output_format": "jpeg",
  "prompt": "Put the little duckling on top of the woman's t-shirt."
}

Technical Specs

SpecValue
Model IDbfl/flux-2/kontext/pro/multi
Inputsaspect_ratio, guidance_scale, images, output_format, prompt, seed
Required inputsprompt
Output fieldscontent_type, url
ExecutionAsync (submit, then poll for result)
Aspect Ratio21:9 / 16:9 / 3:2 / 4:3 / 5:4 / 1:1 / 4:5 / 3:4 / 2:3 / 9:16
Output Formatjpeg / png

Related Models

Start building

Send your first request

OpenAI-compatible endpoint with unified authentication and usage tracking.

Production API
Unified Run API endpoint
https://api.sandbase.ai/v1/run
Model ID
bfl/flux-2/kontext/pro/multi
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
  -X POST "https://api.sandbase.ai/v1/run" \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'SANDBASE_JSON'
{
  "model": "bfl/flux-2/kontext/pro/multi",
  "images": [
    "https://static.sandbase.ai/examples/bfl/flux-2/kontext/pro/multi/input_images_0.webp",
    "https://static.sandbase.ai/examples/bfl/flux-2/kontext/pro/multi/input_images_1.webp"
  ],
  "prompt": "Put the little duckling on top of the woman's t-shirt.",
  "output_format": "jpeg",
  "guidance_scale": 3.5
}
SANDBASE_JSON
)
run_id=$(printf '%s' "$result" | jq -r .id)
for attempt in $(seq 1 120); do
  status=$(printf '%s' "$result" | jq -r .status)
  case "$status" in completed|failed|timeout) break ;; esac
  sleep 2
  result=$(curl --fail-with-body --silent \
    -H "Authorization: Bearer $SANDBASE_API_KEY" \
    "https://api.sandbase.ai/v1/run/$run_id")
done
status=$(printf '%s' "$result" | jq -r .status)
[ "$status" = completed ] || { echo "Generation ended: $status" >&2; exit 1; }
printf '%s\n' "$result"

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