Kling 4.0 vs Veo 3.1: which to pick
Kling 4.0 and Veo 3.1 are the strongest video models with sound right now. Both work from text and images. They differ in clip length, sound handling and price.
Short answer: if people speak in the clip, pick Veo 3.1. For a long scene or many keyframes, pick Kling 4.0.
Key differences
USD at the Basic rate: $5 = 150,000 tokens.
| Kling 4.0 | Veo 3.1 | |
|---|---|---|
| Length | 3 to 30 seconds | 4, 6 or 8 seconds |
| Sound | always | lip-synced speech, ambience, music |
| Quality | 720p and 1080p | 720p, 1080p, 4K |
| Input images | up to 10 keyframes | first and last frame, references |
| 8 seconds, 720p | 28,000 tokens, ≈ $0.93 | Lite 7,500 tokens, ≈ $0.25, Fast 15,000 tokens, ≈ $0.50 |
When Veo 3.1 wins
Veo 3.1 is stronger at speech. Put a line in quotes and the character says it with lip sync. Its price does not depend on length, so 8 seconds cost the same as 4.
When Kling 4.0 wins
Kling 4.0 renders up to 30 seconds in one run, and you can script the scene by seconds and set keyframes with images. It handles human and animal motion well.
Bottom line
Speech and dialogue: Veo 3.1. Long scenes and keyframes: Kling 4.0. Both share one balance, so you can test the same prompt in each.