Short answer: pick Veo 3.1 when a clip of up to 8 seconds with built-in sound is enough, you want to hold a character with reference images, or you want a low, flat price per clip. Pick Kling 3.0 when the clip needs to run longer, up to 15 seconds, or you want to switch the audio off. Everything else comes down to the details below, all of which come from the settings and prices you will actually see in the generator.
We have not scored the two models on picture quality. Quality depends on your subject and your prompt, so the last section gives you a fair way to test both on your own brief.
The two models in a sentence
Veo 3.1 is Google's video model. It makes short clips and generates dialogue, effects and ambience together with the picture. On BestAIVideo it comes in three tiers: Lite, Fast and Quality.
Kling 3.0 is the video model series from Kling AI, part of Kuaishou. It makes longer clips with native audio, and the generator also offers a faster Kling 3.0 Turbo variant for quick tests.
Side by side
| Veo 3.1 | Kling 3.0 | |
|---|---|---|
| Clip length | 4, 6 or 8 seconds | Any whole second from 3 to 15 |
| Resolution | 720p, 1080p, 4K on every tier | 720p, 1080p, 4K (Turbo: 720p, 1080p) |
| Sound | Always on | On by default, with a switch |
| Start from | Text, first frame, optional last frame | Text, first frame, optional last frame |
| Reference images | 1 to 3 on Lite and Fast | Not offered |
| Aspect ratio | 16:9, 9:16, auto | 16:9, 9:16, 1:1 in text mode |
| Pricing basis | Flat price per clip | Price per second of video |
Length and resolution
Veo 3.1 stops at 8 seconds. That is plenty for a product reveal, a reaction shot or a single camera move, but it means a longer scene has to be built from several clips. Kling 3.0 gives you every second from 3 to 15, with 10 as the default, so one request can hold a full action and a pause at the end.
Both reach 4K. On Veo 3.1 you can choose 4K on any tier. On Kling 3.0 the standard model offers 4K, while Turbo stays at 720p and 1080p.
Sound
Both models generate audio, but you control it differently. Veo 3.1 always generates sound, so any dialogue, effects and ambience you want go into the prompt. Google's own prompting guide suggests putting spoken lines in quotation marks and labelling sounds, for example SFX or ambient noise.
Kling 3.0 has an audio switch that is on by default. Turning it off makes the clip cheaper at 720p and 1080p, which is useful when you plan to score the video yourself. At 4K the price is the same either way.
Starting points and references
Both models can start from text or from a first frame with an optional last frame, which is the right choice when a clip must begin or end on a specific picture.
The difference is references. Veo 3.1 offers Omni Reference with one to three images on its Lite and Fast tiers, which helps when the same person or product needs to appear in several clips. Kling 3.0 in this generator has no reference mode, so consistency has to come from a first frame and a consistent prompt.
What it costs on BestAIVideo
Veo 3.1 charges a flat price per clip, whatever its length. Kling 3.0 charges by the second. The table shows an 8 second clip, which is the longest Veo 3.1 can make.
| 8 second clip | 720p | 1080p | 4K |
|---|---|---|---|
| Veo 3.1 Lite | 24 | 28 | 120 |
| Veo 3.1 Fast | 48 | 52 | 144 |
| Veo 3.1 Quality | 200 | 204 | 304 |
| Kling 3.0 with sound | 128 | 173 | 429 |
| Kling 3.0 without sound | 90 | 116 | 429 |
Prices are in credits. Veo 3.1 Fast is about a third of the cost of Kling 3.0 with sound at 1080p, while Veo 3.1 Quality lands close to Kling 3.0 at the same resolution. Kling 3.0 gets more expensive as clips get longer: a 15 second 1080p clip with sound is 324 credits. The generator always shows the exact figure before you submit, and the Pricing page explains how credits work.
Which one to choose
- You need a clip over 8 seconds: Kling 3.0.
- You need the same character or product across clips: Veo 3.1 on Lite or Fast, with reference images.
- You are drafting many ideas cheaply: Veo 3.1 Lite or Fast.
- You want a silent clip to score yourself: Kling 3.0 with audio off.
- You want one tier for everything from drafts to finals: Veo 3.1, where the same prompt runs on Lite, Fast and Quality.
- You need 4K and a short clip: Veo 3.1 is the cheaper route; for a longer 4K clip, Kling 3.0.
Prompting each model
The two vendors publish slightly different advice, and both work in this generator's single prompt box.
Veo 3.1. Google's guide builds a prompt from five parts: cinematography, subject, action, context, and style and ambiance. Open with the shot type and camera move, put dialogue in quotation marks, and label sounds, for example SFX for an effect and ambient noise for the room or landscape. A prompt can also mark beats with timestamps, such as the first two seconds and the next three.
Kling 3.0. Kling's guide asks for plain film terms for the shot (wide, close-up, tracking, overhead, point of view) and a speaker, a tone and a line for each piece of dialogue. When you attach a first frame, spend the words on movement, camera and sound, because the picture already decides the look.
Common questions
Do both make sound? Yes. Veo 3.1 always does, and Kling 3.0 does unless you switch audio off.
Can I start from a photo? Both can: use frame generation with a first frame, and add a last frame if the clip must end on a specific picture.
Which is cheaper? For clips of 8 seconds or less, Veo 3.1 Lite and Fast are cheaper at every resolution. Past 8 seconds only Kling 3.0 can make the clip.
Can I run the same prompt on both? Yes. Switch the model in the generator and compare the two results in your history.
A fair test on your own brief
- Write one prompt with a single subject, one action and one camera move, and keep it under about 8 seconds of action.
- Run it on Veo 3.1 Fast and on Kling 3.0 at 720p with the same aspect ratio and sound on.
- Compare identity, motion, camera and sound separately, then repeat the winner at 1080p.
Both pages have examples and settings you can open before you spend anything: Veo 3.1 and Kling 3.0. To see every model side by side, open the model overview.