What is Kling V3 4K Audio?

Kling V3 4K Audio is an AI video generation model available on UniAll AI for creating short videos from text prompts, reference images, or paired first and last frames. The public model id is `kling-v3-4k-audio`.

It is designed for teams that need higher-resolution video output with audio support, including short-form content teams, ecommerce marketers, product demo creators, creative automation builders, and developers adding AI video generation to an app or workflow.

Core capabilities

Kling V3 4K Audio supports three main generation modes:

| Mode | Use case | Required inputs | |---|---|---| | Text to video | Generate a clip from a written scene description | `prompt` | | Image to video | Animate a reference image into a video | `prompt`, `image_url` | | First/last frame | Guide motion between a start and end frame | `prompt`, `first_image_url`, `last_image_url` |

Supported output settings include durations from 3 to 15 seconds, aspect ratios of `16:9`, `9:16`, and `1:1`, and resolution options including `standard`, `pro`, and `4k`. Each generation returns one video.

How it compares with standard video generation APIs

Kling V3 4K Audio is most useful when visual quality, resolution, and sound matter more than producing the cheapest draft. Compared with standard silent video models, it is better suited for polished campaign assets, product reveal videos, social media clips, and cinematic short-form material.

If you only need quick silent previews, a standard or pro silent variant may be more cost-efficient. If the final output needs 4K delivery and audio in the same workflow, `kling-v3-4k-audio` is the more direct option.

API usage

UniAll AI exposes Kling V3 4K Audio through an async video generation endpoint:

```http POST /v1/videos/generations ```

Example request body:

```json { "model": "kling-v3-4k-audio", "generation_mode": "image_to_video", "prompt": "A cinematic product reveal, soft studio lighting, smooth camera movement.", "image_url": "https://example.com/reference.png", "duration": 5, "aspect_ratio": "16:9", "resolution": "4k", "video_count": 1 } ```

Because generation is async, production integrations should store the task id, poll or listen for completion depending on the application flow, and handle failure states cleanly. UniAll AI supports refund-on-failure behavior for this model, while automatic retry is not enabled by default.

Pricing angle

Kling V3 4K Audio is billed per second. The listed user price for the 4K audio variant is $0.2856 per second, shown in the platform as about ¥2.06 per second. A 5-second 4K audio generation would therefore be estimated from the per-second rate.

There are lower-cost Kling V3 variants for standard, pro, and silent output. For budget-sensitive workflows, compare whether the content truly needs 4K and audio on every run. A common production pattern is to generate drafts with a cheaper tier, then use 4K audio for selected final clips.

Best-fit users

Kling V3 4K Audio is a strong fit for:

  • Marketing teams producing short-form ads, product videos, and launch visuals.
  • Ecommerce teams turning product images into motion assets.
  • Developers building AI video tools with text-to-video or image-to-video features.
  • Agencies that need repeatable, API-driven video production.
  • Creative teams that use first and last frames to control composition and motion.

It is less ideal for long-form video editing, source-video transformation, or workflows that require uploading reference audio, because this interface is focused on generating short clips from prompts and image inputs.

Integration notes

Use `duration` intentionally because it directly affects cost. Choose `9:16` for vertical social clips, `16:9` for web or presentation formats, and `1:1` for square feed assets. For image-to-video, provide clean, high-quality PNG, JPEG, or WebP references. For first/last-frame generation, keep both frames visually coherent so the model has a clearer motion path.

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常见问题

What is the public model id for Kling V3 4K Audio API?

The public model id is `kling-v3-4k-audio`. Use it in the `model` field when calling UniAll AI's video generation endpoint.

What generation modes does Kling V3 4K Audio support?

It supports text-to-video, image-to-video, and first/last-frame video generation. Depending on the mode, you provide a prompt alone, a prompt plus reference image, or a prompt plus first and last frame images.

How is Kling V3 4K Audio priced?

It is billed per second. The listed user price for the 4K audio variant is $0.2856 per second, shown as about ¥2.06 per second on UniAll AI. Final cost depends mainly on duration and selected variant.

官方入口

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