H3 Max Recast on a 5-second video: person swap price

H3 Max Recast (h3-max-recast) replaces the people in a source video with the people from 1 to 4 photos, one photo per person. On a 5-second source it costs $1.8750 at 768p and $2.8125 at 1080p on Sume.

It accepts 5 to 30 seconds, the prompt is optional, and the duration is the source length (Sume's Video Router docs, read 2026-10-06).

What is the price per source second?

Provider list is $0.30 per second at 768p and $0.45 at 1080p; Sume bills that times 1.25 and rounds source seconds up.

How do I send it?

Put the source in video_url and the people in reference_image_urls.

curl -X POST https://api.sume.com/v1/video-router/generate \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: recast-5s-001" \
  -d '{
    "model": "h3-max-recast",
    "video_url": "https://example.com/source.mp4",
    "reference_image_urls": ["https://example.com/person.jpg"],
    "resolution": "768p",
    "mode": "async"
  }'