Veo 3.1 Fast: Quick AI Video Generation for Websites
Google's speed-optimised video model for rapid iteration and lightweight web video.
Video on websites converts. But video production is slow and expensive. Veo 3.1 Fast changes that equation - generate usable video clips in seconds, not hours.
What is Veo 3.1 Fast?
Veo 3.1 Fast is Google's speed-optimised AI video model. It's the video equivalent of Gemini 2.5 Flash - prioritising speed over maximum quality.
| Spec | Detail |
|---|---|
| Max Duration | 8 seconds |
| Max Resolution | 720p |
| Speed | Fastest video generation |
| Token Cost | 6,000 |
| Native Audio | No |
| Reference Images | No |
When to Use Veo 3.1 Fast
Quick iteration
Testing video concepts before committing to higher-quality generation. Try 5 variations in the time it takes to render one Sora clip.
Lightweight web video
- Background loops
- Subtle hero animations
- Social media clips
- Loading/transition animations
Budget-conscious projects
At 6,000 tokens (vs 20,000 for Sora 2 Pro), you can generate 3x more videos for the same cost.
Mobile-first content
720p is fine for mobile viewing and keeps file sizes manageable.
When NOT to Use It
- Need audio → Use Veo 3.1 (standard) or Sora 2 for native audio
- Need higher resolution → Use Veo 3.1 (1080p) or Sora 2 Pro (1792x1024)
- Need longer clips → Use Sora 2 (up to 20 seconds)
- Need maximum quality → Use Sora 2 Pro
Prompt Examples
// Background loop
Slow-motion abstract fluid animation. Deep blue and purple gradients flowing smoothly. Seamless loop potential. Calm, hypnotic movement.
// Hero section animation
Aerial drone shot slowly moving over a modern city at dusk. Lights beginning to turn on in buildings. Smooth, cinematic movement. No text or people.
// Product teaser
Close-up of hands typing on a sleek laptop keyboard. Soft focus, warm lighting. Modern, professional, tech startup aesthetic.
// Social media clip
Time-lapse of clouds moving across a blue sky. Fast movement, dramatic formations. Perfect for vertical mobile format.
Video Aspect Ratios
| Format | Best For |
|---|---|
| 16:9 (Landscape) | Website backgrounds, YouTube, hero sections |
| 9:16 (Portrait) | Instagram/TikTok Stories, mobile-first sites |
| 1:1 (Square) | Social feeds, universal format |
Tips for Better Results
Think in loops
8 seconds is short. Design for seamless loops where the end connects to the beginning.
Keep it simple
Fast models work better with straightforward prompts. Complex scenes with multiple actions often break down.
Ambient over narrative
Veo 3.1 Fast excels at atmospheric, mood-setting clips rather than story-driven sequences.
Describe movement
Be specific about camera motion: "slow pan left", "gradual zoom in", "static shot with subject movement".
Adding Audio Later
Veo 3.1 Fast doesn't generate audio. For website use:
- Background loops: Often work better silent or with your own music bed
- Social clips: Add music in post using any video editor
- Narrated content: Record voiceover separately and sync
If you need native AI-generated audio, use Veo 3.1 (standard) or Sora 2.
Veo 3.1 Fast in ChilledSites
Select Veo 3.1 Fast from the video model dropdown.
Token cost: 6,000 tokens per video - the most affordable video option.
Best workflow
Generate multiple concepts with Fast, pick the best direction, then optionally re-generate with Veo 3.1 or Sora for higher quality.
Summary
Veo 3.1 Fast is your go-to for:
- Rapid video iteration and testing
- Background loops and ambient clips
- Budget-conscious video generation
- Mobile-first content at 720p
It's not the highest quality, but it's the fastest path from idea to video.