Seedance 1.5 Pro
Native audio-visual sync generation
9-language lip sync
4.5B parameters professional-grade
5-12 second video duration
Best for: Short videos with audio sync, multilingual content, marketing ads
Kling
Up to 120-second videos
Powerful camera movements
No audio generation support
Membership pricing
Best for: Long-form content, cinematic shots, narrative videos
Detailed Comparison
| Feature | Seedance 1.5 Pro | Kling |
|---|---|---|
| Developer | ByteDance | ByteDance (Kuaishou) |
| Release Time | December 2025 (1.5 Pro) | 2024 |
| Parameters | 4.5B (4.5 Billion) | Not Public |
| Max Resolution | 1080p | 1080p |
| Max Duration | 5-12 seconds | Up to 120 seconds |
| Audio Generation | ✓ Native audio-visual sync | ✗ Not supported |
| Multi-language Lip Sync | ✓ Supports 9 languages | ✗ Not supported |
| Image-to-Video | ✓ Supports I2V | ✓ Supports I2V |
| API Availability | ✓ Open | ✓ Open |
| Pricing | Pay-as-you-go | Membership |
Conclusion
Seedance and Kling are both excellent AI video models from ByteDance, but with different positioning. Seedance focuses on audio-visual sync and short videos, while Kling excels at long video generation.
If you need dialogue videos with multilingual dubbing, choose Seedance. If you need long-form narrative videos, choose Kling.