bytedance/seedream-5-flash/image-to-image

Image to Image

ByteDance Seedream 5.0 Flash Edit transforms images with text instructions and up to 10 references for product visuals and creative edits. Change backgrounds, materials, colors or visual styles, and combine references to guide a new composition. Specify what should change and what should stay consistent with the source. MuseSpan offers this image editing API with 1K and 2K presets, custom dimensions, and JPEG or PNG output for design workflows and content production.

Try it Get API keyOpenAPI llms.txt

Prompt *

Image URLs *

1 *

Image size

More settings (2)

Num Images

Output Format

ResultExampleSign in to try

$0.027 / image · ~37 images per $1

Example — generated from this input

Edit the supplied nautilus sculpture photograph. Change only the translucent amber-orange glass section into deep cobalt-blue optical glass, preserving its transparency, curved ribs and fine internal details. Keep the ivory ceramic section, spiral silhouette, object scale, camera angle and framing unchanged. Shift the studio background to a pale cool blue and replace the warm golden light with clean cool daylight. Update the glass reflections and caustics to match the blue material, with realistic contact shadows. Keep this a polished product photograph. Do not add text, logos, new objects or a split-screen layout.

Pricing

Unit price $0.027 / image

Billed by the number of images actually generated.

~37 images per $1

Each request temporarily reserves $0.027; you are charged for actual usage, usually within a minute: any unused amount is released and any usage above it is charged to your balance, even if that takes it below zero; while your balance is below zero, new requests are paused until a top-up covers it.

Failed generations are not charged.

API

Submit generation requests with this model ID.

POST/v1/model-tasks

bytedance/seedream-5-flash/image-to-image

Request body

{
  "model": "bytedance/seedream-5-flash/image-to-image",
  "input": {
    "prompt": "Edit the supplied nautilus sculpture photograph. Change only the translucent amber-orange glass section into deep cobalt-blue optical glass, preserving its transparency, curved ribs and fine internal details. Keep the ivory ceramic section, spiral silhouette, object scale, camera angle and framing unchanged. Shift the studio background to a pale cool blue and replace the warm golden light with clean cool daylight. Update the glass reflections and caustics to match the blue material, with realistic contact shadows. Keep this a polished product photograph. Do not add text, logos, new objects or a split-screen layout.",
    "image_urls": [
      "https://pub-a7287c8d5de944d984e22a5bd3ab9bbe.r2.dev/uploads/capability-demo-554bb0cea2bed9c335c456764daa276f.png"
    ],
    "image_size": "auto_2K",
    "num_images": 1,
    "output_format": "png"
  }
}

Input schema

Parameter	Type	Requirement	Default
image_urls	array	Required	—
prompt	string	Required	—
image_size	object \| string	Optional	auto_2K
num_images	integer	Optional	1
output_format	string	Optional	jpeg

Response

The API returns a result or a pollable asynchronous task. See the examples and Schema below for the response mode and result fields.

Asynchronous task

Submit response

HTTP 202

/v1/model-tasksapplication/json

{
  "id": "task_example",
  "model": "bytedance/seedream-5-flash/image-to-image",
  "status": "queued"
}

Status response

HTTP 200

/v1/model-tasks/{id}application/json

{
  "id": "task_example",
  "model": "bytedance/seedream-5-flash/image-to-image",
  "status": "completed",
  "output": {
    "images": [
      {
        "url": "https://api.musespan.com/v1/model-tasks/task_example/artifacts/0"
      }
    ]
  }
}

File download

HTTP 200

/v1/model-tasks/{id}/artifacts/{index}Generated image (e.g. image/png)

When the task completes, file URLs in output point to this endpoint, numbered from 0. Send the same API key (Authorization header) when downloading.

Error response

HTTP 400

/v1/model-tasksapplication/json

{
  "error": {
    "code": "invalid_input",
    "message": "The input does not match this model's input schema. Check the model's API documentation.",
    "type": "invalid_request_error"
  }
}

Code examples

Async submission returns a task ID. Poll until status is completed, then retrieve the generated content from the result. Get your API key in the console.

# Use a new directory for each new generation. Rerunning here continues this task.
set -eu
test -s model-task-id.txt || python3 -c "import uuid; print(uuid.uuid4())" > model-task-id.txt
REQUEST_ID=$(cat model-task-id.txt)
# Idempotent: resending the same bytes with the same ID never charges twice.
curl --fail-with-body --retry 3 --retry-connrefused --request POST 'https://api.musespan.com/v1/model-tasks' \
  --header "Authorization: Bearer $MUSESPAN_API_KEY" \
  --header "X-Request-Id: $REQUEST_ID" \
  --header "Content-Type: application/json" \
  --data '{"model":"bytedance/seedream-5-flash/image-to-image","input":{"prompt":"Edit the supplied nautilus sculpture photograph. Change only the translucent amber-orange glass section into deep cobalt-blue optical glass, preserving its transparency, curved ribs and fine internal details. Keep the ivory ceramic section, spiral silhouette, object scale, camera angle and framing unchanged. Shift the studio background to a pale cool blue and replace the warm golden light with clean cool daylight. Update the glass reflections and caustics to match the blue material, with realistic contact shadows. Keep this a polished product photograph. Do not add text, logos, new objects or a split-screen layout.","image_urls":["https://pub-a7287c8d5de944d984e22a5bd3ab9bbe.r2.dev/uploads/capability-demo-554bb0cea2bed9c335c456764daa276f.png"],"image_size":"auto_2K","num_images":1,"output_format":"png"}}'
# Poll every 5 seconds for up to 25 minutes until status is completed or failed.
# Still queued (with queue_position) 5 minutes after submission: failed with queue_timeout, not charged.
# No result 15 minutes after acceptance (or no confirmation 15 minutes after submission): failed with generation_timeout, not charged.
# Any failure is final: generate again in a new directory (a new X-Request-Id).
# A 404 means the POST did not arrive: rerun this script to resend it with the same ID.
curl --fail-with-body 'https://api.musespan.com/v1/model-tasks/'"$REQUEST_ID"'' --header "Authorization: Bearer $MUSESPAN_API_KEY"