How much does one video cost?

It depends on the settings. The exact price is on the button before you start, and it updates with every change.

What if it doesn't work out?

If the run fails at the provider, no credits are charged. If the result is ready but you don't like it, press “Edit and retry”: the prompt and settings stay.

Which frame shapes are there?

16:9, 9:16, 1:1, 21:9. 9:16 suits Reels, Shorts and stories; 16:9 suits YouTube and websites.

from 3s to 30s. Pick the length in the settings before you start.

Can I use my own picture?

Yes: add up to 21 — from your computer, from the Library or as an element. The model takes them as a base or a reference.

How is Kling 4.0 different from Kling 3.0?

Both are in the Kuaishou line-up. Switch between them in the line-up at the top of the page — the price of each is on its card.

Where are the results kept?

Every finished result goes to your Library. From there you can download it, publish it in the Community or use it as the base for the next one.

Models

Kuaishou20 models

Kuaishou's Kling family — video across several tiers, plus motion transfer, talking avatars and its own image models.

Kling 4.0New

Kuaishou · Video · 3–30s · 720p, 1080p

API

Video

Image

Audio

Open model page →

Saved

Example

Your video will appear here

Fill in the settings and press Run. The result is also saved to your library.

Price

Reference price

No published price yet - this model is not in the public price list.

What the price depends on

This model is billed per second of output, so length is the biggest lever on the price.
Resolution and quality settings change the price. Change one and the number above follows.
A generation the provider fails is not charged. A chat answer is charged for what the model wrote and thought, even if you stop it.

Prices for every model Top up

Prices are in credits. What a credit costs is on the pricing page.

Which one to pick

Model	Key specs	Price from
Kling 4.0New· you are here	3–30s · 720p, 1080p	—
Kling 3.0	3–15s · 1:1, 16:9, 9:16	—
Kling 3 Turbo	3–15s · 16:9, 9:16, 1:1	—
Kling O3 Video	3–15s · 1:1, 16:9, 9:16	—
Kling 3 Motion Control	720p, 1080p	—
Kling 2.6	5, 10s · 1:1, 16:9, 9:16	—
Kling 2.6 Motion Control	720p, 1080p	—
Kling 2.5 Turbo Pro	5, 10s · 16:9, 9:16, 1:1	—
Kling O1 Video	3–15s · 16:9, 9:16, 1:1	—
Kling 2.1 Master	5, 10s · 16:9, 9:16, 1:1	—
Kling 2.1	5, 10s	—
Kling Avatar 2	—	—
Kling Multi-Image	5, 10s · 16:9, 9:16, 1:1	—
Kling 1.6	5, 10s · 1:1, 16:9, 9:16	—

About the model

Kuaishou Kling 4.0: 3 to 30 seconds at 720p or 1080p, always with stereo sound — from a prompt, up to ten frames, or up to fifteen references: pictures, clips and sound.

Produces: Video
Takes: text, pictures, sound, video
Length: from 3s to 30s
Frame shape: 16:9, 9:16, 1:1, 21:9
Resolution: 720p, 1080p

What you can set

Every setting of this model and the choices it allows — the same as in the form.

Last frame
one file
Input images
up to 10 files
Sound reference
up to 3 files
Style references
up to 10 files
Motion reference
up to 5 files
Clip to edit or continue
one file
Aspect ratio
16:99:161:121:9
Duration
from 3s to 30s
Resolution
720p1080p
Source audio
Keep originalAuto
What to do with the clip
Edit itContinue it

For developers

Run this from your own code

The same request the Generate tab sends, with the settings you have chosen.

Model id:kling-4

curl -X POST https://seedara.ai/api/v1/generate \
  -H "Authorization: Bearer $SEEDARA_API_KEY" \
  -H "Content-Type: application/json" \
  --data '{
  "model": "kling-4",
  "prompt": "Describe the shot: subject, action, camera move, lighting...",
  "params": {
    "aspect_ratio": "16:9",
    "duration_seconds": 5,
    "resolution": "720p"
  }
}'

This snippet updates as you change the form. Copy it once the settings are the ones you want.

Request parameters

What goes in `params`, by the names the API uses.

Optional

Left out unless you set them - the provider then applies its own default.

Parameter	Type	Accepted values	Default
`end_image_url` Last frame	image	—	—
`image_urls` Input images	images	up to 10 files	—
`reference_audio_urls` Sound reference	audio files	up to 3 files	—
`reference_image_urls` Style references	images	up to 10 files	—
`reference_video_urls` Motion reference	videos	up to 5 files	—
`video_url` Driving video	video	—	—
`aspect_ratio` Aspect ratio	one of a list	`16:99:161:121:9`	16:9
`duration` Duration	whole number	any value from 3 to 30	5
`resolution` Resolution	one of a list	`720p1080p`	720p
`audio_setting` Source audio	one of a list	`originauto`	—
`video_mode` What to do with the clip	one of a list	`editextend`	edit

How a generation runs

POST /v1/generate answers immediately with a job_id - it does not wait for the result.
Poll GET /v1/jobs/{id} until status is completed or failed.
A completed job carries output_url - the finished file.

curl https://seedara.ai/api/v1/jobs/JOB_ID \
  -H "Authorization: Bearer $SEEDARA_API_KEY"

Questions

Frequently asked about Kling 4.0

New

Start now

Your first video —
in a minute

Describe what you want to see — the model does the rest.

Takes you to the settings — prompt, format and price are already there

No auto-charges
Pay only for a finished result
Works are kept in your Library

100credits as a gift

3–30sLength

16:9 · 9:16 · 1:1Frame shape