Kling 3.0 Omni API Pricing: Per-Second Cost for All 4 Endpoints

TL;DR

• Kling 3.0 Omni has four endpoints on HiAPI (text-to-video, image-to-video, reference-to-video, and video transformation), and all of them bill per second.
• Text, image, and reference-to-video without a reference video share one rate: $0.10 per second at 720p ($0.129 with sound), $0.129 at 1080p ($0.1645 with sound), and $0.479 at 4K.
• Reference-to-video with a reference video, and transformation, use a second rate: $0.143 at 720p, $0.193 at 1080p, $0.479 at 4K. A 5-second 720p clip without sound costs $0.50, and failed tasks are free.

Price table

Endpoint	Model id	720p / second	1080p / second	4K / second
Text-to-video	kling-3.0-omni/text-to-video	$0.10, $0.129 with sound	$0.129, $0.1645 with sound	$0.479
Image-to-video	kling-3.0-omni/image-to-video	$0.10, $0.129 with sound	$0.129, $0.1645 with sound	$0.479
Reference-to-video (images only)	kling-3.0-omni/reference-to-video	$0.10, $0.129 with sound	$0.129, $0.1645 with sound	$0.479
Reference-to-video (with a reference video)	kling-3.0-omni/reference-to-video	$0.143	$0.193	$0.479
Video transformation	kling-3.0-omni/transformation	$0.143	$0.193	$0.479

Live HiAPI prices, checked October 15, 2026.

How billing works:

• 4K is the same with or without sound: $0.479 per second.
• A reference video turns sound off. With video_urls set, audio must be false, so that tier has a single price.
• Transformation follows the source clip's length (3–15.5 seconds) and doesn't generate sound.
• Text, image, and reference-to-video run 3–15 seconds, and resolution defaults to 720p.

Cost by duration

Text, image, and reference-to-video without a reference video:

Duration	720p	720p + sound	1080p	1080p + sound	4K
3 s	$0.30	$0.387	$0.387	$0.4935	$1.437
5 s	$0.50	$0.645	$0.645	$0.8225	$2.395
10 s	$1.00	$1.29	$1.29	$1.645	$4.79
15 s	$1.50	$1.935	$1.935	$2.4675	$7.185

Reference-to-video with a reference video, and transformation:

Duration	720p	1080p	4K
3 s	$0.429	$0.579	$1.437
5 s	$0.715	$0.965	$2.395
10 s	$1.43	$1.93	$4.79
15 s	$2.145	$2.895	$7.185

$10 covers 100 seconds at 720p without sound, about twenty 5-second clips.

What you get for the money

One paper boat through three endpoints: text-to-video for the first shot, then transformation to turn the rainy night into snow.

A paper boat drifts down a rain-soaked city gutter at dusk, neon signs reflecting and rippling on the water; the camera glides low beside it as raindrops splash around. Cinematic, shallow depth of field, smooth tracking motion.

Generate with this prompt → (3 seconds, 720p)

Text-to-video, 720p, 3 seconds, no sound, $0.30.

Transform the scene into a snowy winter night: the gutter becomes a frozen stream with drifting snowflakes, the paper boat becomes a small glowing paper lantern boat, keep the exact camera motion and water movement from the original video. Cinematic, cold blue tones.

Generate with this prompt → (upload your source video, 720p)

Transformation, 720p, follows the 3-second source, $0.429.

Omni vs the other Kling 3.0 lines

Model	720p / s	720p + sound	1080p / s	1080p + sound	4K / s
Kling 3.0 Omni	$0.10	$0.129	$0.129	$0.1645	$0.479
Kling 3.0	$0.10	$0.143	$0.129	$0.193	$0.479
Kling 3.0 Turbo	— (sound always on)	$0.13 (sound included)	—	$0.16 (sound included)	—

Without sound, Omni and standard Kling 3.0 cost the same. With sound, Omni is cheaper per second ($0.014 less at 720p, $0.0285 less at 1080p). What Omni adds is reference-to-video and transformation; for when to pick which, see Kling 3.0 Omni vs Kling 3.0.

Ways to spend less

• Iterate at 720p, 3 seconds: $0.30 a try. Move to 1080p or 4K once the prompt works.
• Leave sound off unless you need it: audio defaults to false; turning it on adds $0.029 per second at 720p.
• Trim reference videos: the reference-video tier starts at $0.143 per second.
• Set resolution on purpose: the default is 720p; ask for 1080p explicitly.

FAQ

Does the number of reference images change the price?

No. Reference-to-video pricing depends only on resolution, sound, and whether you send a reference video.

How is transformation billed?

Per second of output, and the output length follows the source video (3–15.5 seconds).

Am I charged for failed tasks?

No. You pay only for videos that generate successfully.

Can I get 4K with sound?

Yes. 4K is $0.479 per second either way.

Integration code is in the Kling 3.0 Omni API guide, and ready-made prompts in Kling 3.0 Omni prompt examples. Or generate your first clip on the model page.