Coffee shop window screen: 15-second 9:16 clip at 1080p

For a 15-second vertical shop-screen clip at 1080p, Sume prices kling-3 silent at $2.10, minimax-h3-max at $3.00, kling-3 with sound at $3.15, wan-3.0 at $3.75, seedance-2 at $12.76 and seedance-2.5 at $21.33. gemini-omni-flash-1.1 tops out at 10 seconds, so it is not a one-clip answer.

A shop screen plays on a loop and usually has no sound, so the silent Kling row is the sensible benchmark price, and an audio-less render is the one place the generate_audio toggle earns its keep. Source: Video Router, read 2026-10-06.

What does the 15-second clip cost?

9:16, 1080p, 15 seconds.

How do I make it loop?

Send the same photo as the first and last frame so the clip ends where it began; Wan 3.0, Kling 3, H3 and Seedance list end-frame support. The motion between the frames still has to return to the start, so ask for a gentle, repeating action such as steam rising or a ceiling fan turning.

curl -sS -X POST https://api.sume.com/v1/videos \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "wan-3.0",
    "prompt": "Steam rising from a latte on a window counter, slow and steady",
    "duration": 15,
    "resolution": "1080p",
    "aspect_ratio": "9:16",
    "frame_images": [
      {"type": "image_url", "image_url": {"url": "https://example.com/latte.jpg"}, "frame_type": "first_frame"},
      {"type": "image_url", "image_url": {"url": "https://example.com/latte.jpg"}, "frame_type": "last_frame"}
    ]
  }'

What is the cheaper plan?

Render the loop at 720p on Wan 3.0 for $1.88 and check it on the actual screen first. Many shop screens are 1080p panels, but a 720p render is often fine from across the room.