Kling Video O3 4K Reference to Video | Fast Image-to-Video API

Kling Video O3 4K Reference-to-Video

Kling Video O3 4K Reference-to-Video generates premium 4K video from reference images with optional video guidance. Upload reference images to establish character identity and appearance, optionally provide a reference video for motion guidance, and describe the scene — the model produces cinematic 4K video with identity consistency.

Why Choose This?

4K quality The highest visual fidelity and motion realism in the Kling family.
Multi-reference images Upload up to 7 reference images (or up to 4 with a reference video).
Video-guided generation Optional reference video for motion and scene guidance.
Keep original sound Preserve the audio from the reference video in the output.
Sound generation Optional AI-generated sound effects when no reference video is provided.
Multi-prompt and element list support Chain prompt segments for scene transitions and lock in specific visual elements for consistency throughout the clip.

Parameters

Parameter	Required	Description
prompt	Yes	Text description of the video scene, characters, and motion.
images	No	Reference images: up to 4 with video, up to 7 without.
sound	No	Generate AI audio (only when no reference video). Default: disabled.
aspect_ratio	No	Output ratio: 16:9 (default), 9:16, 1:1.
duration	No	Video length in seconds (3-15, default: 5).
shot_type	No	Editing mode: customize (default) or intelligent.
multi_prompt	No	Additional prompt segments to guide scene transitions and progressions.
element_list	No	List of visual elements to maintain consistency throughout the clip.

How to Use

Write your prompt — describe the scene, characters, and action.
Upload reference images — add character or scene references.
Configure audio — keep original sound from the reference video, or enable AI sound generation.
Select aspect ratio — match your target platform.
Set duration — choose any length from 3 to 15 seconds.
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.
Add element list items (optional) — see Notes below for how to use elements effectively.
Run — submit 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

Character Consistency — Generate videos with identity-consistent characters from reference images.
Video Remixing — Use a reference video for motion guidance with new characters or elements.
Marketing & Ads — Create promotional videos featuring specific people or products.
Storytelling — Produce narrative scenes with consistent character appearance across clips.
Long-Form Scenes — Up to 15 seconds for extended scene development.

Pro Tips

Use multiple reference images from different angles for better identity preservation.
When using a reference video, the image limit is 4; without a video, you can use up to 7.
Enable keep_original_sound to preserve audio from your reference video.
Sound generation is only available when no reference video is provided.
Use shorter durations (3-5s) for testing, longer (10-15s) for final production.
Match aspect ratio to your platform: 16:9 for YouTube, 9:16 for TikTok and Reels, 1:1 for Instagram.
Use multi_prompt to build smooth narrative progressions across the clip.

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.
Reference images limit: up to 4 with video, up to 7 without.
When a reference video is provided, sound generation is replaced by keep_original_sound.
Using element_list: First use Kling Elements to generate your element and note its name and ID. Then simply write the element name naturally in your prompt, and enter the corresponding element ID in the element_list field.
Ensure uploaded image and video URLs are publicly accessible.

Related Models

Kling Video O3 4K Text-to-Video — Generate cinematic 4K video from text prompts.
Kling Video O3 4K Image-to-Video — Animate a still image into 4K video.
Kling Elements — Create reusable visual elements for consistent character and object rendering.

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

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/kwaivgi/kling-video-o3-4k/reference-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 Reference To Video below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/kwaivgi/kling-video-o3-4k/reference-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",
    "sound": false,
    "aspect_ratio": "16:9",
    "duration": 5,
    "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/reference-to-video", {
        "prompt": "A cinematic shot of a city at sunset, soft golden light",
        "sound": false,
        "aspect_ratio": "16:9",
        "duration": 5,
        "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/reference-to-video",
    {
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "sound": false,
    "aspect_ratio": "16:9",
    "duration": 5,
    "shot_type": "customize"
}
)

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

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

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

Kling Video O3 4k Reference To Video is a Kuaishou model for video generation from images, exposed as a REST API on WaveSpeedAI. Kling Video O3 4K Reference-to-Video generates creative 4K videos using character, prop, or scene references from multiple viewpoints. Extracts subject features and creates new video content while maintaining identity consistency across frames. Supports multi-reference images, video guidance, and optional audio generation. Ready-to-use REST API, best performance, no cold starts, affordable pricing. You can call it programmatically or try it from the playground above.

How do I call the Kling Video O3 4k Reference 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-reference-to-video.

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

Kling Video O3 4k Reference 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 Reference To Video accept?

Key inputs: `prompt`, `images`, `aspect_ratio`, `duration`, `element_list`, `multi_prompt`. 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-reference-to-video.

How do I get started with the Kling Video O3 4k Reference 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 Reference 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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