In plain words
Veo 3.1 Fast makes short videos, 4, 6 or 8 seconds long. You describe a scene, or upload a photo, and it turns that into a clip. The clip comes with sound, so a beach can sound like waves.
It can also start from two pictures: a first one and a last one. It works out the movement in between.
How to get the most out of it
- Use it to explore. Make a first version, then change one thing at a time: the light, the weather, what the camera does.
- Name the sounds. “Crackling wood”, “quiet chatter”, “a church bell far away”.
- Keep one moment per clip. Eight seconds is short. One or two actions work better than a whole story.
- Start from a picture when you want a particular look. The image library has ideas for making one first.
How it compares with its siblings
Its only sibling in chatmodel is Veo 3.1. Both make the same lengths, the same sizes (up to 4K) and both add sound. Fast is the one built for speed, so many people try ideas with Fast and switch to Veo 3.1 for the version they keep.
When to pick another model
If you want longer clips, Seedance 2.0 goes up to 15 seconds and Wan V3.0 up to 30. If you want to change a clip you already have, look at Grok Imagine Video. Not sure where to start? See which model should I use.