Kling Video O3 4K Text to Video | Powerful Text-to-Video API

Kling Video O3 4K Text-to-Video

Kling Video O3 4K is Kuaishou's flagship text-to-video model, delivering cinematic 4K video generation from natural language prompts. It combines physics-aware motion simulation, high temporal consistency, and optional synchronized audio generation to produce professional-grade video content.

Need to animate an image? Try Kling Video O3 4K Image-to-Video
Looking for a lower-cost option? Try Kling Video 2.1 Text-to-Video

Why Choose This?

4K cinematic output Produces richly detailed 4K video with professional-grade lighting, composition, and motion rendering.
Physics-aware motion Understands real-world dynamics — fluid movement, fabric, hair, and object interactions behave naturally and believably.
Synchronized audio generation Enable the sound option to generate matching ambient audio, sound effects, and atmosphere alongside your video.
Multi-prompt support Chain multiple prompt segments to guide scene transitions and narrative flow within a single generation.
Element list control Reference specific visual elements to maintain consistency in characters, objects, or stylistic details across the clip.
Flexible duration and aspect ratios Duration from 3 to 15 seconds. Supports 16:9, 9:16, and 1:1 aspect ratios.

Parameters

Parameter	Required	Description
prompt	Yes	Text description of the scene, action, camera style, lighting, and mood.
aspect_ratio	No	Output aspect ratio. Options: 16:9, 9:16, 1:1.
duration	No	Clip length in seconds (3-15, default: 5).
sound	No	Whether to generate synchronized audio for the video. Default: off.
shot_type	No	Editing mode: customize (default) or intelligent.
multi_prompt	No	Additional prompt segments to guide scene progression and transitions.
element_list	No	List of specific visual elements to maintain across the generation.

How to Use

Write your prompt — describe the scene, characters, camera movement, lighting style, and mood in detail.
Select aspect ratio — choose 16:9 for cinematic/landscape, 9:16 for portrait/social, or 1:1 for square formats.
Set duration — choose 3 to 15 seconds based on your scene length.
Enable sound (optional) — check the sound option to generate matching audio alongside the video.
Select shot_type (optional) — use intelligent for automatic scope, or customize for manual control.
Add multi-prompt segments (optional) — click Add Item to guide scene transitions with additional prompts.
Add element list items (optional) — specify visual elements to maintain consistency throughout the clip.
Submit — generate, preview, and download your video.

Pricing

$0.42 per second of video, regardless of whether audio is on or off.

Duration	Cost
3s	$1.26
5s	$2.10
10s	$4.20
15s	$6.30

Best Use Cases

Cinematic Storytelling — Render rich, narrative-driven scenes from detailed prompts with 4K output.
Commercial & Brand Video — Produce premium marketing footage without a film crew.
Social Media Content — Generate portrait or square clips with synchronized audio for maximum engagement.
Concept Visualization — Bring creative directions, moods, and visual concepts to life quickly for client review.
Music & Audio-Visual Projects — Use sound generation for immersive, atmosphere-driven clips.

Pro Tips

The more specific your prompt, the better — include camera angle, lighting era, character behavior, and atmosphere.
Use multi_prompt to create smooth narrative progressions across a single clip.
Enable sound when generating scenes with ambient environments, crowds, or action for a more immersive result.
Start with a short duration to validate your prompt before committing to a longer run.
Use element_list to lock in key visual details that must remain consistent throughout the video.

Notes

Only prompt is required; all other parameters are optional.
Duration range: 3 to 15 seconds.
Audio does not affect pricing — $0.42 per second regardless.
Please follow Kuaishou's content usage policies when crafting prompts.

Related Models

Kling Video O3 4K Image-to-Video — Animate a still image into a cinematic 4K video.
Kling Video O3 4K Reference-to-Video — Generate video from reference images with identity consistency.
Kling Elements — Create reusable visual elements for consistent character and object rendering.

Kling Video O3 4k Text To Video API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/kwaivgi/kling-video-o3-4k/text-to-video with your input as JSON. The endpoint returns a prediction id; poll the prediction endpoint until status flips to completed, then read the output URL from data.outputs[0]. Examples for Kling Video O3 4k Text To Video below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/kwaivgi/kling-video-o3-4k/text-to-video" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY" \
  -d '{
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "aspect_ratio": "16:9",
    "duration": 5,
    "sound": false,
    "shot_type": "customize"
}'

# Response includes a prediction id. Poll for the result:
curl -X GET "https://api.wavespeed.ai/api/v3/predictions/{request_id}/result" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY"

# When status is "completed", read the output from data.outputs[0].

Node.js example

// npm install wavespeed
const WaveSpeed = require('wavespeed');

const client = new WaveSpeed(); // reads WAVESPEED_API_KEY from env

const result = await client.run("kwaivgi/kling-video-o3-4k/text-to-video", {
        "prompt": "A cinematic shot of a city at sunset, soft golden light",
        "aspect_ratio": "16:9",
        "duration": 5,
        "sound": false,
        "shot_type": "customize"
});

console.log(result.outputs[0]); // → URL of the generated output

Python example

# pip install wavespeed
import wavespeed

output = wavespeed.run(
    "kwaivgi/kling-video-o3-4k/text-to-video",
    {
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "aspect_ratio": "16:9",
    "duration": 5,
    "sound": false,
    "shot_type": "customize"
}
)

print(output["outputs"][0])  # → URL of the generated output

Kling Video O3 4k Text To Video API — Frequently asked questions

What is the Kling Video O3 4k Text To Video API?

Kling Video O3 4k Text To Video is a Kuaishou model for video generation, exposed as a REST API on WaveSpeedAI. Kling Video O3 4K generates cinematic 4K videos from text prompts with subject consistency, natural physics simulation, and precise semantic understanding. Supports multi-prompt scene transitions, element references, and optional audio generation. Ready-to-use REST API, best performance, no coldstarts, affordable pricing. You can call it programmatically or try it from the playground above.

How do I call the Kling Video O3 4k Text To Video API?

POST your input parameters to the model's REST endpoint (shown in the API tab of this playground) with your WaveSpeedAI API key in the Authorization header. Submission returns a prediction ID; poll the prediction endpoint until status flips to "completed", then read the output URL from the result. The playground generates a ready-to-paste code sample in Python, JavaScript, or cURL for whatever inputs you've set. Full request/response shape is documented at https://wavespeed.ai/docs/docs-api/kwaivgi/kwaivgi-kling-video-o3-4k-text-to-video.

How much does Kling Video O3 4k Text To Video cost per run?

Kling Video O3 4k Text To Video starts at $2.10 per run. That figure is the base price — the final charge scales with the parameters you set in the form (output size, length, count, references, or whatever knobs this model exposes), so a higher-quality or larger output costs more than a minimal one. The exact cost for your current input is shown live next to the Generate button before you submit, and the actual per-call charge is recorded on the prediction afterwards.

What inputs does Kling Video O3 4k Text To Video accept?

Key inputs: `prompt`, `aspect_ratio`, `duration`, `element_list`, `multi_prompt`, `shot_type`. The full JSON schema (types, defaults, allowed values) is rendered above the Generate button and mirrored in the API reference at https://wavespeed.ai/docs/docs-api/kwaivgi/kwaivgi-kling-video-o3-4k-text-to-video.

How do I get started with the Kling Video O3 4k Text To Video API?

Sign up for a free WaveSpeedAI account to claim starter credits, copy your API key from /accesskey, then call the endpoint shown in the API tab of the playground. The playground also auto-generates a code sample in Python, JavaScript, or cURL for the parameters you've set.

Can I use Kling Video O3 4k Text To Video outputs commercially?

Commercial usage rights depend on the model's license, set by its provider (Kuaishou). The license summary appears on the model card above; see WaveSpeedAI's Terms of Service for platform-level conditions.

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