The quick tier of Kling 4.0: one take of up to 20 seconds at 720p, with sound, from a prompt, a first frame or reference images and videos. Kling built it for frequent creation, with faster generation at 60% of the Kling 4.0 rate.
The same three ways in as Kling 4.0, shorter and at one resolution: describe the scene, start from a first frame, or hand it the faces, products, places and moves to keep. Kling sets it apart for rapid iteration and short-form video.
One take, in whole seconds. The length is what you pay for.
The one resolution, in 8-bit SDR. Sound is generated with the picture.
Up to ten images, five reference videos and seven elements in one Omni job.
Ultrawide, beside 16:9, 9:16 and 1:1, from the same model.
Characters, setting, camera and the order of events in one prompt. Choose 21:9, 16:9, 9:16 or 1:1.
One image opens the video and the prompt says what happens next. The image sets the shape.
Reference images for characters and products, reference videos for motion and camera, one video to edit, and elements: up to fifteen inputs to keep a scene consistent.
Kling's own Kling 4.0 Flash examples, with the reference images they were made from.
The people and the place come from the images; the shots, the motion and the sound come from the model.
3 reference imagesTwo portraits and a landscape become one scene: the pair meet on the cliff top, and the cut moves from the wide shot to each face and back, with both people kept as they were in the images.
1 reference imageOne still of a high kick turns into a fast exchange of strikes, in the same room and the same light.
Flash keeps text, first frames and Omni references. What it leaves out, Kling 4.0 has.
| Kling 4.0 Flash | Kling 4.0 | |
|---|---|---|
| Length | 3–20 s | 3–30 s |
| Resolution | 720p | 720p, 1080p |
| Price at 720p | $0.0942 a second | $0.157 a second |
| First frame | Yes | Yes |
| Last frame, key frames | No | Up to ten |
| Omni references | Yes, 15 inputs | Yes, 15 inputs |
| Input videos | 3–20 s in total | 3–30 s in total |
| Voice cloning, voices bound to elements | No | Yes |
Twenty seconds covers most social spots, ad variants and story beats.
Iterate on the idea at the Flash rate, then render the keeper on Kling 4.0 at 1080p.
9:16, 1:1 and 16:9 clips up to 20 seconds, with sound, from the same prompt and the same key.
Reference images keep the product and the people steady while the scene around them changes.
A product shot, a key visual or a frame from a storyboard, used as the first frame.
You set the length, so the price is known before the job starts. Aspect ratio and the way in (text, a first frame or images) do not change it. Input videos on Omni change how many seconds are counted.
| 720p | No input video | With input video |
|---|---|---|
| Per billed second | $0.0942 | $0.0628 |
| 10 seconds out | $0.94 | $1.26 |
| 20 seconds out | $1.88 | $2.51 |
With input videos on Omni, a reference or a video to edit: when they are no longer than the output, twice the output length is billed; when they are longer, the input plus the output. The rows above assume input no longer than the output.
Kling's own list price: 0.6 units a second, 0.4 with input video, at $0.157 a unit, read from Kling's API pricing on 4 November 2026. If Kling changes it, the price here follows.
Direct relationships with model providers. Our direct relationships with model providers help us secure better commercial terms for our clients, early access to new models, and access to models that are not publicly available.
On the invoice you already get. Same key, same monthly bill, split by project or team like the rest of the catalogue.
Kling 4.0 Flash is coming to the Sociaro catalogue next to Kling 4.0. With a key already, it will be a new model name in your call. Without one, tell us what you want to run and we come back with a key, usually the same day.
