Assets

Try a sample
Optional. With one it becomes image-to-video extending from that frame; without, it is pure text-to-video

Prompt

Sora handles narrative prose well: write scene, action, camera and mood as sentences rather than stacked keywords

Settings

Size
The standard model takes only these two; anything else is rejected. Use Sora 2 Pro for 1792×1024 and friends
Duration
Defaults to 4 seconds, billed per second
4s × 720x1280
My generations0