Four different labs, four different bets on what "good" AI video looks like. You can generate with any of them directly from their own tool page β Kling, Veo 3.1, Sora 2 and Seedance β and it's genuinely useful to know what each one is actually good at before you pick one and burn credits finding out.
Kling β from Kuaishou
Kling pairs sharp motion detail with precise, dramatic camera control: sweeping orbits, crash zooms, drone-style passes. Its 2.6 generation introduced simultaneous audio-visual generation β dialogue, sound effects and ambient noise generated in the same pass as the picture, including different voice types (speaking, narration, singing) and multi-language support. Motion control got a real upgrade too: full-body movement, fast action like dance or martial arts, and hand detail that used to be a weak point for every video model.
- Clip lengths: 5 or 10 seconds
- Resolution: up to 1080p
- Aspect ratios: 16:9, 9:16, 1:1
- Native audio: yes
- Best for: product cinematography, dramatic reveals, anything relying on precise, intentional camera movement
Veo 3.1 β from Google DeepMind
Veo 3.1 is built for realism and fidelity first. It generates synchronized 48kHz audio by default β dialogue, sound effects and ambience arrive already matched to the picture, with lip-sync accurate enough to survive a close-up. Output goes up to full 4K, and Veo 3.1 added portrait (9:16) support and the ability to extend a sequence past its base length, on top of the landscape format Veo shipped with originally.
- Clip lengths: 4, 6 or 8 seconds
- Resolution: up to 4K
- Aspect ratios: 16:9, 9:16
- Native audio: yes
- Best for: hero assets and anything where visual fidelity is non-negotiable
Sora 2 β from OpenAI
Sora 2's specialty is holding a long, coherent shot together. Liquids pour the way liquids should, crowds don't dissolve into noise, and multiple subjects interacting with each other and the environment stay physically plausible across the whole clip β the exact scenarios that make most video models fall apart. It also generates synchronized audio natively rather than layering sound on afterward.
- Clip lengths: 4, 8 or 12 seconds
- Resolution: 720p
- Aspect ratios: 16:9, 9:16
- Native audio: generated, not available as a toggle on this platform's integration
- Best for: narrative sequences and complex-physics shots other models tend to break on
Seedance β from ByteDance
Seedance (1.5 Pro) generates picture and sound together in a single pass β dialogue, sound effects and ambience arrive natively synced to the motion, with support for multiple dialects. It's tuned for fast turnaround on expressive, high-energy content: dance, action, and social-first clips that need to render quickly without losing coherence.
- Clip lengths: 5 or 10 seconds
- Resolution: 480p or 720p
- Aspect ratios: 21:9, 16:9, 4:3, 1:1, 3:4, 9:16
- Native audio: yes
- Best for: social-first content, dance and action, fast iteration
Side-by-side
| Kling | Veo 3.1 | Sora 2 | Seedance | |
|---|---|---|---|---|
| Studio | Kuaishou | Google DeepMind | OpenAI | ByteDance |
| Clip lengths | 5s / 10s | 4s / 6s / 8s | 4s / 8s / 12s | 5s / 10s |
| Max resolution | 1080p | 4K | 720p | 720p |
| Aspect ratios | 16:9, 9:16, 1:1 | 16:9, 9:16 | 16:9, 9:16 | 21:9, 16:9, 4:3, 1:1, 3:4, 9:16 |
| Native audio | Yes | Yes | Yes | Yes |
| Signature strength | Camera control | Realism & fidelity | Physics & continuity | Speed & expressiveness |
What it costs
Credits work the same way regardless of which model you pick: 4 credits per second of output, so the model choice doesn't change your budget math β only the clip length does.
- A 5-second clip costs 20 credits
- An 8-second clip costs 32 credits
- A 10-second clip costs 40 credits
- A 12-second clip costs 48 credits
See our credits guide for the full breakdown, including how image generation is priced.
How to actually choose
If you're not sure, this is a reasonable default order to try:
- Need the shot to look flawless and you have a fixed, short beat? Veo 3.1.
- Need precise, deliberate camera movement β an orbit around a product, a slow reveal? Kling.
- Need a longer, physically complex shot to hold together β liquid, crowds, multiple people interacting? Sora 2.
- Need fast, expressive, social-native content and want to iterate quickly? Seedance.
None of these are locked in β you can generate the same prompt across two or three models and compare, which is often the fastest way to learn which engine matches your particular shot. For the prompt-writing side of this, see our AI video prompting guide.