Seedance 2.0 (ByteDance), Veo 3.1 (Google DeepMind) and Kling 3.0 (Kuaishou) are three of the most used AI video models today. All three turn a text prompt or an image into a short clip with sound, so on paper they look interchangeable. In practice they differ a lot in clip length, how many references they accept, how audio works and what a finished video costs.
This guide compares them on the points that actually change your result and your bill. Every number below is what you get when you run the models on SeeVid, where all three are available side by side with the same credits.
The Short Answer
- Pick Seedance 2.0 when you need control: several reference images, a reference video or audio to follow, consistent characters across shots, or clips up to 15 seconds.
- Pick Veo 3.1 for short, polished shots with strong prompt adherence — product beats, cinematic 4–8 second moments, and image-to-video from up to three reference images.
- Pick Kling 3.0 for flexible 3–15 second clips at a lower price, especially when you can skip audio or want 4K at a moderate cost.
Side-by-Side Comparison
| Seedance 2.0 | Veo 3.1 Fast | Kling 3.0 | |
|---|---|---|---|
| Developer | ByteDance | Google DeepMind | Kuaishou |
| Modes | Text, image, reference-to-video | Text, image-to-video | Text, image-to-video |
| Clip length | 4–15 s (any whole second) | 4, 6 or 8 s | 3–15 s (any whole second) |
| Resolution | 480p, 720p, 1080p, 4K | 720p, 1080p, 4K | 720p, 1080p, 4K |
| Aspect ratios | Auto, 16:9, 9:16, 1:1, 4:3, 3:4, 21:9 | Auto, 16:9, 9:16 | 16:9, 9:16, 1:1 |
| Native audio | Yes (can be turned off) | Yes (can be turned off) | Optional (costs more when on) |
| Reference inputs | Up to 9 images, 3 videos, 3 audio clips | Up to 3 images | Start frame + optional end frame |
| 5 s at 720p on SeeVid | 55 credits | — (8 s: 84 credits) | 30 credits (45 with sound) |
Clip Length and Pacing
Seedance 2.0 generates anywhere from 4 to 15 seconds in one pass, and it can cut between several shots inside that clip. A 15-second generation can read like a small edited sequence rather than one continuous take.
Kling 3.0 is similarly flexible at 3–15 seconds, which makes it easy to match a clip to a beat in your edit without trimming.
Veo 3.1 works in fixed lengths of 4, 6 or 8 seconds. That is plenty for a single strong shot, but you will stitch several generations together for anything longer.
Image Quality and Resolution
All three reach 4K on SeeVid. Seedance 2.0 is the only one that also offers 480p, which is useful for cheap drafts while you are still iterating on a prompt. Veo 3.1 and Kling 3.0 start at 720p.
For most social content 720p or 1080p is the sweet spot. Reserve 4K for final deliverables: it costs several times more on every model.
Audio
Each model can generate sound with the video, but they handle it differently:
- Seedance 2.0 produces audio and video together in one pass — dialogue with lip sync, sound effects matched to on-screen action, ambience and music. You can switch audio off, and on SeeVid that does not change the price.
- Veo 3.1 also generates dialogue and ambience natively; turning audio off makes an 8-second 720p clip cheaper (56 instead of 84 credits).
- Kling 3.0 treats sound as an option. With sound on, a 5-second 720p clip goes from 30 to 45 credits.
If audio is central to the clip — a character speaking, a product demo with sound design — Seedance 2.0 and Veo 3.1 are the natural choices.
References and Consistency
This is where the models differ most.
Seedance 2.0 accepts up to nine reference images, three reference videos and three audio clips in a single request. You tag them in the prompt (@image1, @video1, @audio1) to say exactly what each one is for: this face, that outfit, the camera move from this clip, the rhythm of that track. It is the strongest option for keeping a character or product consistent across several shots.
Veo 3.1 takes up to three reference images for image-to-video, which covers most "animate this scene" and "keep this product" use cases.
Kling 3.0 uses a start frame and an optional end frame. That is ideal when you know exactly where a shot should begin and end, such as a transition between two stills.
Cost Per Video
Credits on SeeVid are the same across models, so you can compare directly. Approximate cost per second at 720p:
| Model (720p) | Credits per second |
|---|---|
| Seedance 2.0 | 11 |
| Seedance 2.0 Fast | ~7 |
| Veo 3.1 Fast (with audio) | ~10.5 |
| Veo 3.1 Lite | ~3.8 |
| Kling 3.0 (no sound) | 6 |
| Kling 3.0 (with sound) | 9 |
Seedance 2.0 is not the cheapest per second, but it does the most per generation: longer clips, more references and audio included. When you only need a quick, simple shot, Seedance 2.0 Fast, Veo 3.1 Lite or Kling 3.0 without sound will save credits. See the Seedance 2.0 pricing guide for full price tables.
Which Model for Which Job?
| Use case | Best fit | Why |
|---|---|---|
| Recurring character across several clips | Seedance 2.0 | Multiple reference images and character consistency |
| Recreate a camera move or dance from a clip | Seedance 2.0 | Reference video input |
| Music-driven or dialogue-heavy clip | Seedance 2.0 / Veo 3.1 | Native audio generated with the video |
| Short premium product shot | Veo 3.1 | Strong prompt adherence in 4–8 s |
| Transition between two images | Kling 3.0 | Start and end frame control |
| Lots of drafts on a budget | Seedance 2.0 Fast / Kling 3.0 | Lower cost per second |
| Final delivery in 4K | Any of the three | All support 4K |
How to Try Them Side by Side
The quickest way to decide is to run the same prompt on each model:
- Open the AI Video Generator.
- Write one prompt and generate it with Seedance 2.0.
- Switch the model to Veo 3.1 and then Kling 3.0 and generate again — your prompt stays in place.
- Compare the clips in your history and keep the model that fits the shot.
Start at 720p and a short duration so the comparison stays cheap, then move to 1080p or 4K once you have picked a model.
FAQ
Is Seedance 2.0 better than Veo 3.1? Neither is better at everything. Seedance 2.0 wins on clip length, reference inputs and multi-shot control; Veo 3.1 is excellent for short, polished shots with strong prompt adherence. Many creators use both.
Which model is cheapest? Per second, Veo 3.1 Lite and Kling 3.0 without sound are the cheapest of these options. Within the Seedance family, Seedance 2.0 Fast and Mini cost much less than standard Seedance 2.0.
Which model makes the longest videos? Seedance 2.0 and Kling 3.0 both go up to 15 seconds per generation. Veo 3.1 tops out at 8 seconds. If you need even longer clips, Seedance 2.5 generates up to 30 seconds in one pass.
Can I use all three models with one account? Yes. On SeeVid every model draws from the same credit balance, so you can switch models per shot without separate subscriptions.
Conclusion
There is no single best AI video model — there is a best model for each shot. Use Seedance 2.0 when you need references, consistency, audio and longer takes; Veo 3.1 for short, high-polish moments; and Kling 3.0 for flexible lengths at a lower price.
Try all three with the same prompt on SeeVid and keep the one that fits.