Grok Imagine video editing: 8.7 s on xAI, Omni edit on Sume

Grok Imagine video editing is in xAI's docs with an 8.7 second cap on the edited video. The Sume Grok row has video_to_video: false; to edit a clip on Sume, send prompt plus video_url to gemini-omni-flash-1.1.

xAI's cap is from its video docs, read 2026-09-30. Sume's edit rules are from the Video Router docs and catalog.

What does xAI say about editing?

Its feature list includes video editing, and it states that edited video is capped at 8.7 seconds.

What is Sume's edit route?

The Video Router lists video_to_video (edit) for gemini-omni-flash-1.1: send video_url, with a prompt that describes the edit. resolution is optional and defaults to 720p. aspect_ratio is rejected and duration is not sent.

What are the input rules?

video_url is the edit source, not a reference: it cannot be combined with image_url, end_image_url or reference_*_urls. Prompting tips are in Gemini Omni video edit prompts.

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: video-router-edit-001" \
  -d '{
    "model": "gemini-omni-flash-1.1",
    "prompt": "Replace the bottle with an apple. Keep everything else the same.",
    "video_url": "https://example.com/clip.mp4",
    "resolution": "720p",
    "mode": "async"
  }'

What should I do?

Do not port a Grok edit call to the Sume Grok row. Rewrite it as an Omni edit, and check the Omni duration limits for your source clip.