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# Kling 4 vs Veo 3.1 — Length, 4K, Audio Compared

> Kling 4.0 vs Veo 3.1: 3–30s at 720p/1080p with 10 references vs 4–8s up to 4K with 3 references. Specs from the Video Lab catalog. Try both online.

Canonical page: https://clipstudio.ai/ai-video-models/kling-4-vs-veo-3-1

## Intent

Kling 4.0 runs 3–30 seconds at 720p or 1080p with audio on every clip and up to 10 references. Veo 3.1 runs 4, 6, or 8 seconds up to 4K with optional audio and up to three references.

## Verdict

Kling 4.0 lists 3–30 seconds at 720p or 1080p in 21:9, 16:9, 1:1, or 9:16, with audio generated on every clip, first/last frames, and up to 10 reference images. Veo 3.1 lists 4, 6, or 8 seconds at 720p, 1080p, or 4K in 16:9 or 9:16, with optional audio, first/last frames, up to three references (reference mode is an 8-second shot), negative prompt, and seed. Choose Kling 4.0 when the shot is long or leans on a reference pack; choose Veo 3.1 when 4K delivery or a silent take matters. Clip Studio does not publish a quality ranking between them.

## Spec table

| Spec | Kling 4.0 | Veo 3.1 |
| --- | --- | --- |
| Duration | 3–30 seconds | 4, 6, or 8 seconds |
| Resolution | 720p, 1080p | 720p, 1080p, 4K |
| Aspect ratios | 21:9, 16:9, 1:1, 9:16 | 16:9, 9:16 |
| Audio | Native audio | Optional generated audio |
| Modes | Text prompt, Animate image, First → last, References | Text prompt, Animate image, First → last, References |
| References | Up to 10 | Up to 3 |
| Advanced controls | None listed | Negative prompt, Seed |

## FAQs

### Which is longer, Kling 4 or Veo 3.1?

Kling 4.0 lists 3–30 seconds in one clip. Veo 3.1 lists 4, 6, or 8 seconds.

### Does Kling 4 output 4K like Veo 3.1?

No. Kling 4.0 lists 720p or 1080p in Video Lab. Veo 3.1 lists 720p, 1080p, or 4K.

### Can I turn audio off?

On Veo 3.1, yes: audio is optional. Kling 4.0 generates audio with every clip in Video Lab.

### How many reference images does each take?

Kling 4.0 takes up to 10. Veo 3.1 takes up to three, and its reference mode is an 8-second shot.

### How are Kling 4.0 and Veo 3.1 priced?

Neither is free. Both are included in every Clip Studio plan and use the plan’s monthly generation allowance, and each setup is quoted before you generate. At each model’s default setup (Kling 4.0: 5 seconds at 1080p with audio; Veo 3.1: 6 seconds at 1080p with audio), Clip Pro’s monthly allowance covers about 5 Kling 4.0 clips or about 2 Veo 3.1 clips. Plan details live on the pricing page.


## Related

- [Kling 4.0](https://clipstudio.ai/ai-video-models/kling-4.md)
- [Veo 3.1](https://clipstudio.ai/ai-video-models/veo-3-1.md)
- [Video Lab](https://clipstudio.ai/video-lab.md)
- [All models](https://clipstudio.ai/ai-video-models.md)
- [Kling 4.0 vs Kling O3](https://clipstudio.ai/ai-video-models/kling-4-vs-kling-o3.md)
- [Veo 3.1 vs Seedance 2.5](https://clipstudio.ai/ai-video-models/veo-3-1-vs-seedance-2-5.md)
- [FLUX 3 Max vs Veo 3.1](https://clipstudio.ai/ai-video-models/flux-3-max-vs-veo-3-1.md)
- [Gemini Omni Flash vs Veo 3.1](https://clipstudio.ai/ai-video-models/gemini-omni-flash-vs-veo-3-1.md)