Shortest Omni Flash clip is 3 seconds: stingers and loops

Gemini Omni Flash outputs clips from 3 to 10 seconds, so a 3 second stinger is a single request, while Sora's guide lists 4 seconds as its shortest length. A 3 second 720p clip costs 3 x $0.10 = $0.30 at Google's list price and 3 x $0.125 = $0.375 on Sume at list x 1.25.

Sources: the Gemini Omni Flash model page, OpenAI's Sora 2 Prompting Guide and the Gemini API pricing page, read on 2026-10-03.

Where 3 seconds is enough

Brand stingers, a product reveal, a reaction cut-in, a transition shot between two longer clips, a loopable background for a text card. All fit in 3 seconds, and the short length makes instruction-following easier, as the Sora guide notes for short clips.

Make it loop

The model does not document a loop mode. For a loop, ask for a static camera, a repeating motion and matching first and last frames: send image_url and end_image_url as the same image. Test that the seam is not visible before you rely on it.

Request

Use 360p to check the idea.

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: stinger-001" \
  -d '{
    "model": "gemini-omni-flash-1.1",
    "prompt": "A glass logo-less product cube spins once and settles, static camera, soft studio light, a single soft chime.",
    "resolution": "360p",
    "duration": 3,
    "aspect_ratio": "9:16",
    "mode": "async"
  }'

Join and ship

Join stingers into longer pieces with Timeline 1.0. The Video Router docs list the model limits.