bfl/flux-2-pro/outpaint
Flux 2 Pro Outpaint 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
Send your first request
OpenAI-compatible endpoint with unified authentication and usage tracking.
https://api.sandbase.ai/v1/runbfl/flux-2-pro/outpaintInput Schema
7 parameters · 1 required · 6 optional
| Parameter | Type | Required | Description |
|---|---|---|---|
image | string | Required | The image URL to expand using outpainting. |
auto_crop | boolean | Optional | Whether to automatically crop the reference image when the expanded canvas does not fully contain it. · Default: false |
expand_top | integer | Optional | Pixels to expand at the top of the image. · Min: 0 · Max: 2048 · Default: 0 |
expand_left | integer | Optional | Pixels to expand on the left of the image. · Min: 0 · Max: 2048 · Default: 0 |
expand_right | integer | Optional | Pixels to expand on the right of the image. · Min: 0 · Max: 2048 · Default: 0 |
expand_bottom | integer | Optional | Pixels to expand at the bottom of the image. · Min: 0 · Max: 2048 · Default: 0 |
output_format | string | Optional | The format of the generated image. · Options: jpeg, png · Default: "jpeg" jpegpng |
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-2-pro/outpaint",
"image": "https://static.sandbase.ai/examples/bfl/flux-2-pro/outpaint/input_image_0.png",
"auto_crop": false,
"expand_top": 0,
"expand_left": 200,
"expand_right": 200,
"expand_bottom": 200,
"output_format": "jpeg",
"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 2 Pro
Flux 2 Pro extends a source image beyond its original boundaries with FLUX.2 Pro. The model uses visible context to infer continuing architecture, landscape, objects, perspective, illumination, and texture, creating a wider or taller composition that feels like part of the same captured scene rather than a separately pasted border.
Use it to adapt an approved asset to a new aspect ratio, reveal additional environment, add copy space, or repair an overly tight crop. Describe what should plausibly exist outside each edge and what must remain unchanged inside the source; consistent horizon, camera perspective, light direction, and material continuity are more important than adding unrelated detail.
Highlights
- Contextual canvas extension. Generates plausible scene content outside the source image boundaries.
- Perspective continuation. Extends geometry, horizon, scale, and camera relationships into the added area.
- Lighting and texture continuity. Matches illumination, color, material, and detail across the original edge.
- Composition-aware expansion. Creates useful wider or taller framing while preserving the source’s main subject and visual intent.
Pricing
| Configuration | Billing unit | Price |
|---|---|---|
| Base generation | Per request | $0.03 |
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",
"auto_crop": false,
"expand_top": 0,
"expand_left": 0
}
Technical Specs
| Spec | Value |
|---|---|
| Model ID | bfl/flux-2-pro/outpaint |
| Input fields | image (string)<br>auto_crop (boolean)<br>expand_top (integer; 0–2048)<br>expand_left (integer; 0–2048)<br>expand_right (integer; 0–2048)<br>expand_bottom (integer; 0–2048)<br>output_format (string; jpeg, png) |
| Required input | image |
| Output fields | url, content_type |
| Execution | Asynchronous job |
Related Models
bfl/flux-2-lora-gallery/apartment-stagingbfl/flux-2-lora-gallery/face-to-full-portraitbfl/flux-2-lora-gallery/multiple-angles

