Kling 4.0 vs Veo 3.1: Length, Resolution, Audio and Price Compared (2026)

Kling 4.0 and Veo 3.1 are the two video models people compare most this month. Kling 4.0 from Kuaishou makes one take of up to 30 seconds. Veo 3.1 from Google DeepMind makes 8-second clips that go up to 4K. Both generate sound with the picture. This guide compares them on length, resolution, audio, control and price, shows which one fits which job, and gives you prompts to run on both. You can use both models on Veo3 AI with one account.

Specs and prices below were checked on Veo3 AI on November 11, 2026. Veo3 AI is an independent product and is not affiliated with Google or Kuaishou.

Kling 4.0 vs Veo 3.1 at a glance

Length: one long take or short shots

This is the biggest difference. Kling 4.0 makes a single take of up to 30 seconds, so one prompt can carry a whole scene: an opening, an action and an ending. Veo 3.1 makes 8-second clips. For anything longer you plan several shots and join them, or extend a clip.

Pick Kling 4.0 when the moment has to stay in one continuous shot, such as a product demo, a walk-through or a dance. Pick Veo 3.1 when your edit is built from short cuts anyway, as most ads and social videos are.

Resolution and format

Veo 3.1 on Veo3 AI renders at 720p, 1080p or 4K. Kling 4.0 renders at 720p or 1080p here. Kling's own guide describes 4K output, but that is not available on Veo3 AI yet.

Kling 4.0 has more frame shapes: 16:9, 9:16, 1:1 and the cinematic 21:9. Veo 3.1 covers 16:9 and 9:16, which is enough for YouTube, TikTok and Reels.

Audio

Both models generate sound together with the picture: dialogue, effects and ambience. Write what we should hear in the prompt, such as "rain on a tin roof, a dog barking far away, no music". Keep spoken lines short. In 8 seconds Veo 3.1 fits one or two short sentences; Kling 4.0's longer takes leave room for a short exchange.

Control: frames and references

Both models can start from a first frame and end on a last frame, which helps when a shot has to land on a set composition. On Veo3 AI, Kling 4.0 (Media) also accepts reference images and videos to keep a character, product or style consistent, and Veo 3.1 accepts reference images for a consistent character.

Price per clip on Veo3 AI

Veo 3.1 is much cheaper per clip. An 8-second Veo 3.1 clip costs 10 credits at 720p, 14 at 1080p and 20 at 4K. Veo 3.1 Lite costs 6 credits at 720p.

Kling 4.0 costs 7 credits per second at 720p and about 10.25 at 1080p. An 8-second clip is 56 or 82 credits, and a full 30-second take is 210 or 308 credits.

So a 30-second video costs about 40 credits as four Veo 3.1 clips at 720p, or 210 credits as one Kling 4.0 take. You pay more for Kling when the single unbroken take matters.

What about Kling 4.0 Flash?

Kling 4.0 Flash opened in early access on September 28, 2026, for a limited group of Kling's annual subscribers on Kling's own platform, before the full Kling 4.0 model launched on October 15. Flash is not available on Veo3 AI. The Kling 4.0 option here is the full model.

Which one should you use?

• Ads and social clips cut from short shots: Veo 3.1, for the lower price per clip and 4K output.
• A scene that must stay in one take: Kling 4.0, for up to 30 seconds without cuts.
• Ultra-wide cinematic framing: Kling 4.0, for 21:9.
• Testing many ideas cheaply: Veo 3.1 Lite at 6 credits per clip, then rerun the winner.
• Not sure: run the same prompt on both and compare. On Veo3 AI you switch models in the same generator.

Prompts to test both models

Use the same prompt on both models and compare motion, sound and how closely each one follows the brief.

Product shot (8 seconds): "Close-up of a matte black smartwatch on a wet stone. The camera slowly orbits as the screen lights up. Sound: soft rain, a light tap on the glass."

One-take scene (try 20 to 30 seconds on Kling 4.0): "Handheld single take. A chef plates a dish in a busy kitchen, carries it through swinging doors into a warm dining room and sets it in front of an elderly couple. Sound: kitchen clatter, then soft jazz and quiet laughter."

Dialogue (8 seconds): "Medium close-up of a street musician in a red scarf at night. He looks up and says: 'This one's for anyone still out here.' Sound: city traffic, a single guitar chord."

FAQ

Is Kling 4.0 better than Veo 3.1?

Neither is better for every job. Kling 4.0 makes longer single takes, up to 30 seconds. Veo 3.1 makes 8-second clips at up to 4K and costs far less per clip on Veo3 AI. Choose by the shot you need.

How long can Kling 4.0 and Veo 3.1 videos be?

On Veo3 AI, Kling 4.0 makes 3 to 30 seconds per generation and Veo 3.1 makes 8 seconds per generation.

Do Kling 4.0 and Veo 3.1 have audio?

Yes. Both generate dialogue, sound effects and ambient sound together with the video.

Which is cheaper, Kling 4.0 or Veo 3.1?

Veo 3.1. On Veo3 AI an 8-second 720p clip costs 10 credits with Veo 3.1 and 56 credits with Kling 4.0.

Can I use Kling 4.0 Flash on Veo3 AI?

No. Kling 4.0 Flash was opened to a limited group of Kling's annual subscribers on Kling's own platform. Veo3 AI offers the full Kling 4.0 model.

Can I use both models with one account?

Yes. Kling 4.0, Veo 3.1 and Veo 3.1 Lite are all in the Veo3 AI generator, paid with the same credits. The cost is shown before you generate.

Try both on the same prompt

Open the Kling 4.0 page or the Veo 3.1 page, paste one of the prompts above and compare the results. For a model-by-model look at Kling's previous version, see Kling 3.0 vs Veo 3.1.