bytedance/seedvr/upscale/image/seamless

Name: SeedVR2
Author: Bytedance

Seedvr Upscale Image is Bytedance's intelligent image editing model. Transform, retouch, and reimagine existing images using text prompts - from background replacement to artistic style conversion.

Input

Image URL or upload(string)

Upload

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

The input image to be processed

This field is required.

Output Format(string)

The format of the output image. Allowed values: png, jpeg.

Noise Scale(number)

The noise scale to use for the generation process. Range: 0 to 1.

Target Resolution(string)

The target resolution to upscale to when `upscale_mode` is `target`. Allowed values: 720p, 1080p, 1440p, 2160p.

Upscale Mode(string)

The mode to use for the upscale. If 'target', the upscale factor will be calculated based on the target resolution. If 'factor', the upscale factor will be used directly. Allowed values: target, factor.

Upscale Factor(number)

110

Upscaling factor to be used. Will multiply the dimensions with this factor when `upscale_mode` is `factor`. Range: 1 to 10.

Seed(integer)

The random seed used for the generation process.

Idle

Example output — click Run to generate your own

Production endpoint

Send your first request

OpenAI-compatible endpoint with unified authentication and usage tracking.

POSThttps://api.sandbase.ai/v1/run

Model IDbytedance/seedvr/upscale/image/seamless

Input Schema

7 parameters · 1 required · 6 optional

Parameter	Type	Required	Description
`image`	string	Required	The input image to be processed
`seed`	integer	Optional	The random seed used for the generation process.
`noise_scale`	number	Optional	The noise scale to use for the generation process. · Min: 0 · Max: 1 · Default: 0.1
`upscale_mode`	string	Optional	The mode to use for the upscale. If 'target', the upscale factor will be calculated based on the target resolution. If 'factor', the upscale factor will be used directly. · Options: target, factor · Default: "factor" targetfactor
`output_format`	string	Optional	The format of the output image. · Options: png, jpeg · Default: "png" pngjpeg
`upscale_factor`	number	Optional	Upscaling factor to be used. Will multiply the dimensions with this factor when `upscale_mode` is `factor`. · Min: 1 · Max: 10 · Default: 2
`target_resolution`	string	Optional	The target resolution to upscale to when `upscale_mode` is `target`. · Options: 720p, 1080p, 1440p, 2160p · Default: "1080p" 720p1080p1440p2160p

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, or timeout
Retrieve — Read outputs from 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": "bytedance/seedvr/upscale/image/seamless",
  "image": "https://static.sandbase.ai/examples/bytedance/seedvr/upscale/image/seamless/input_image_0.png",
  "noise_scale": 0.1,
  "upscale_mode": "factor",
  "output_format": "png",
  "upscale_factor": 2,
  "target_resolution": "1080p",
  "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"

← Back to SeedVR2

API README

SeedVR2 Seamless Image Upscaler

bytedance/seedvr/upscale/image/seamless restores and enlarges a still image while suppressing seams, tiling boundaries, and texture discontinuities that become obvious at higher resolution. SeedVR2 combines detail reconstruction with identity and composition preservation, so faces, typography, edges, and repeated patterns remain connected instead of looking independently sharpened. This combination makes the model a practical choice when the creative outcome depends on those qualities rather than on a generic media conversion.

For production work, Its seamless mode is particularly useful for large canvases and texture-rich artwork, where ordinary upscalers can reveal patch borders or inconsistent grain. The result is most reliable when the source material and creative brief clearly describe the intended subject, progression, visual or sonic character, and the qualities that must remain unchanged.

Highlights

Seam-aware enlargement minimizes patch boundaries across broad, continuous surfaces.

Detail reconstruction recovers fine texture without simply increasing edge contrast.

Content preservation keeps the source composition and recognizable subjects stable.

Restoration handles compression softness and low-resolution degradation during the upscale.

Pricing

Billing unit	Price
Per request	$0.0025

When to Use

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

Prompt Guide

For image-conditioned 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.

{
  "image": "https://static.sandbase.ai/examples/bytedance/seedvr/upscale/image/seamless/input_image_0.png",
  "output_format": "png"
}

Technical Specs

Spec	Value
Model ID	`bytedance/seedvr/upscale/image/seamless`
Inputs	image, noise_scale, output_format, seed, target_resolution, upscale_factor, upscale_mode
Required inputs	image
Output fields	content_type, url
Execution	Async (submit, then poll for result)
Output Format	png / jpeg