Bytedance Seedream V5.0 Lite Edit Sequential API Documentation

Bytedance Seedream V5.0 Lite Edit Sequential API Documentation

Playground

Seedream 5.0 Lite Edit Sequential performs multi-image editing while locking character and object identity across shots. It detects main subjects, preserves continuity, and applies controlled edits with up to 4K output. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

Features

Seedream V5.0 Lite Edit Sequential creates a series of images from reference pictures and a text prompt. Explore variations in scenes, styling, and composition for storyboards, product concepts, and visual campaigns.

Why Choose This?

• Reference-guided creation — Use up to 10 images to guide subjects, styles, and compositions.
• Natural language editing — Describe the changes you want in plain text.
• Multiple variations — Explore several scenes or looks in one request.
• Flexible output — Choose custom dimensions and JPEG or PNG output.

Parameters

How to Use

1. Add reference images — Provide clear pictures of the subjects or elements you want to use.
2. Set the image count — Choose max_images and state the same number in your prompt.
3. Write your prompt — Describe each image in order and specify a shared style.
4. Choose the output settings — Optionally set size, then choose JPEG or PNG.
5. Generate — Submit your request and download the results.

Pricing

Price = $0.035 × max_images. Billing is based on the selected max_images value, not the number of images ultimately returned.

Supported output sizes, output formats, and reference image count do not add separate charges.

Best Use Cases

• Storyboards — Explore a sequence of scenes for a project.
• Visual campaigns — Develop related images with a shared theme.
• Character concepts — Explore outfits, settings, and compositions.
• Social media series — Create images for multi-image posts.

Pro Tips

• Use clear reference images and describe their roles in the prompt.
• Refer to images by their upload order, such as “Figure 1” and “Figure 2”.
• Specify both the changes you want and the details you want to retain.
• Separate scene descriptions with “First,” “Second,” and so on, while keeping shared details consistent.

Notes

• Both prompt and images are required. Supply image URLs that the service can access.
• Omit size for automatic sizing; this does not guarantee the same pixel dimensions as the reference image.
• max_images is an upper limit, not a guarantee of the number of images returned. State the desired count clearly in your prompt.
• Reference images and requested output images must total no more than 15. For example, 10 references allow up to 5 outputs.
• Custom sizes must contain between 3,686,400 and 16,777,216 total pixels, with a width-to-height ratio between 1:16 and 16:1. Both conditions must be met.
• Total pixels are calculated as width × height. Not every combination shown by the size controls meets these limits.
• Specify dimensions through size; separate width and height parameters are not supported.

Related Models

• Seedream V5.0 Lite Text-to-Image — Generate a single image from a text prompt.
• Seedream V5.0 Lite Edit — Edit images using text instructions.
• Seedream V5.0 Lite Sequential — Generate multiple images from one prompt.

Authentication

For authentication details, please refer to the Authentication Guide.

API Endpoints

Submit Task & Query Result

set -euo pipefail

export WAVESPEED_API_KEY="your-api-key"

REQUEST_BODY=$(cat <<'JSON'
{
  "prompt": "A cinematic ocean wave at sunrise, highly detailed",
  "images": [
    "https://interactive-examples.mdn.mozilla.net/media/cc0-images/painted-hand-298-332.jpg"
  ],
  "max_images": 1,
  "output_format": "jpeg"
}
JSON
)

# 1. Submit the prediction once. Never retry this request automatically:
# a retry after an unclear failure can create a second, billed task.
CHECK='The task may already exist. Check History or the predictions list before submitting again.'
if ! SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
  --connect-timeout 10 --max-time 60 \
  -X POST "https://api.wavespeed.ai/api/v3/bytedance/seedream-v5.0-lite/edit-sequential" \
  -H "Authorization: Bearer ${WAVESPEED_API_KEY}" \
  -H "Content-Type: application/json" \
  -d "${REQUEST_BODY}"); then
  printf 'Submit failed. %s\n' "${CHECK}" >&2
  exit 1
fi

TASK=$(printf '%s' "${SUBMIT_RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
PREDICTION_ID=$(printf '%s' "${TASK}" | jq -r '.id // empty')
if [ -z "${PREDICTION_ID}" ]; then
  printf 'Submission response did not contain a prediction id. %s\n' "${CHECK}" >&2
  exit 1
fi
RESULT_URL="https://api.wavespeed.ai/api/v3/predictions/${PREDICTION_ID}/result"

# 2. Poll until the prediction reaches a final status.
BODY_FILE=$(mktemp)
trap 'rm -f "${BODY_FILE}"' EXIT
while true; do
  # Transient errors (429, 5xx) are retried, honoring Retry-After.
  HTTP_CODE=$(curl --silent --show-error --fail-with-body \
    --connect-timeout 10 --max-time 60 --retry 5 --retry-delay 2 \
    --output "${BODY_FILE}" --write-out '%{http_code}' \
    "${RESULT_URL}" \
    -H "Authorization: Bearer ${WAVESPEED_API_KEY}" || true)
  case "${HTTP_CODE}" in
    2??) ;;
    000|429|5??)  # dropped connection or temporary error: keep polling
      printf 'Task %s: HTTP %s, polling again in 10s\n' "${PREDICTION_ID}" "${HTTP_CODE}" >&2
      sleep 10; continue ;;
    *) printf 'Task %s: HTTP %s\n' "${PREDICTION_ID}" "${HTTP_CODE}" >&2
      cat "${BODY_FILE}" >&2; exit 1 ;;
  esac
  RESULT=$(jq 'if type == "object" and has("data") then .data else . end' "${BODY_FILE}")
  STATUS=$(printf '%s' "${RESULT}" | jq -r '.status // empty')

  case "${STATUS}" in
    completed) printf '%s\n' "${RESULT}" | jq '.outputs'; break ;;
    failed|cancelled|timeout|deleted)
      printf 'Task %s ended with status %s\n' "${PREDICTION_ID}" "${STATUS}" >&2
      printf '%s\n' "${RESULT}" | jq . >&2; exit 1 ;;
    *) sleep 2 ;;
  esac
done

Parameters

Task Submission Parameters

Request Parameters

Every model also accepts the global request options enable_sync_mode and enable_base64_output; see their pages for details.

Response Parameters

Result Request Parameters

Result Response Parameters