bfl/flux-1/krea/redux
Flux 1 Krea Redux is BFL's intelligent image editing model. Transform, retouch, and reimagine existing images using text prompts - from background replacement to artistic style conversion.
PNG, JPEG, WebP, or GIF · 20 MiB maximum
Example output — click Run to generate your own
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OpenAI-compatible endpoint with unified authentication and usage tracking.
https://api.sandbase.ai/v1/runbfl/flux-1/krea/reduxInput Schema
6 parameters · 1 required · 5 optional
| Parameter | Type | Required | Description |
|---|---|---|---|
image | string | Required | The URL of the image to generate an image from. |
seed | integer | Optional | The same seed and the same prompt given to the same version of the model will output the same image every time. |
aspect_ratio | string | Optional | The aspect ratio of the generated image. · Options: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16 21:916:93:24:35:41:14:53:42:39:16 |
output_format | string | Optional | The format of the generated image. · Options: jpeg, png · Default: "jpeg" jpegpng |
guidance_scale | number | Optional | Min: 1 · Max: 20 · Default: 4.5 |
num_inference_steps | integer | Optional | Min: 1 · Max: 50 · Default: 28 |
Output Schema
| Field | Type | Description |
|---|---|---|
id | string | Unique identifier for the generation task |
status | string | Task status: pending, running, completed, failed, timeout |
model | string | Model used for the generation |
outputs | array | Array of output items |
outputs[].url | string | URL of the generated artifact |
outputs[].content_type | string | MIME type (e.g. image/png, video/mp4) |
error | object | null | Error details if failed, null on success |
error.type | string | Machine-readable error type code |
error.message | string | Human-readable error description |
Async Workflow
This model uses asynchronous execution. Submit a request and poll for the result.
- Submit — POST to /v1/run, receive an
id - Poll — GET /v1/run/{id} until status is
completed,failed, ortimeout - Retrieve — Read
outputsfrom the completed response
Code Examples
Ready-to-run snippets
# Step 1: Submit
curl -X POST https://api.sandbase.ai/v1/run \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "bfl/flux-1/krea/redux",
"image": "https://static.sandbase.ai/examples/bfl/flux-1/krea/redux/output_url_0.jpg",
"output_format": "jpeg",
"guidance_scale": 4.5,
"num_inference_steps": 28,
"prompt": "a beautiful sunset over mountains"
}'
# Step 2: Poll result (replace <id>)
curl https://api.sandbase.ai/v1/run/<id> \
-H "Authorization: Bearer YOUR_API_KEY"API README
FLUX.1 Krea [dev] Redux
FLUX.1 Krea [dev] Redux is a reference-driven FLUX.1 workflow that combines the aesthetic character associated with Krea’s FLUX variant and Redux visual conditioning. A supplied image becomes the starting language for color, composition, texture, and mood, allowing creators to develop a related visual rather than reproduce the source literally or rebuild its direction from text alone.
Use this route for mood-board expansion, campaign variations, style exploration, and alternate treatments of an approved visual. Choose a reference with the composition or art direction worth carrying forward, then judge the result by how well it preserves those high-level cues while introducing a fresh subject treatment, rendering choice, or visual interpretation.
Highlights
- Krea-oriented aesthetics. Produces a distinctive polished visual treatment associated with the Krea FLUX family.
- Redux reference conditioning. Extracts composition, palette, texture, and style direction from a supplied image.
- Creative visual variation. Generates a related alternative rather than a pixel-identical reconstruction of the reference.
- Prompt-light exploration. Supports visual ideation led primarily by reference imagery when a long written brief is not the best input.
Pricing
| Configuration | Billing unit | Price |
|---|---|---|
| Base generation | Per request | $0.025 |
When to Use
| ✅ Good fit | ❌ Consider alternatives |
|---|---|
| The project needs this exact generation or editing route | The intended task belongs to video, audio, or 3D media |
| Available references match every required local field | Required source assets or rights are unavailable |
| The brief can specify composition, color, and finish | Output must be deterministic at pixel level |
| Supported dimensions and formats fit final placement | Delivery requires unsupported canvas specifications |
| An asynchronous generated image fits production | A live frame-synchronous response is mandatory |
Prompt Guide
Write a complete visual brief: identify the subject and references, define composition and viewpoint, describe lighting, palette, materials, typography, and finish, then list exact preservation constraints. FLUX.2 Klein does not rely on prompt upsampling, so use clear descriptive sentences rather than sparse keywords.
{
"image": "https://example.com/reference.jpg",
"seed": 1,
"aspect_ratio": "21:9",
"output_format": "jpeg"
}
Technical Specs
| Spec | Value |
|---|---|
| Model ID | bfl/flux-1/krea/redux |
| Input fields | seed (integer)<br>image (string)<br>aspect_ratio (string; 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16)<br>output_format (string; jpeg, png)<br>guidance_scale (number; 1–20)<br>num_inference_steps (integer; 1–50) |
| Required input | image |
| Output fields | url, content_type |
| Execution | Asynchronous job |
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