Kling 4.0 by Kuaishou
Kling 4.0 AI video generator: Up to 30 seconds in one take, with sound
Kling 4.0 is the newest Kling model on Viralance and the one with the longest single take: up to 30 seconds at 720p / 1080p, with native audio, from a prompt or a photo. Clips start at 10 credits for 5 seconds at 720p.
Opens the studio with Kling 4.0 selected; the cost shows before you generate. Viralance is an independent platform, not affiliated with Kuaishou.
What Kling 4.0 does
Kling 4.0 generates one continuous shot of 5 / 10 / 15 / 30s, so a scene with several actions, a spoken line and a camera move can play out without a cut. It renders at 720p / 1080p and generates the soundtrack with the picture.
The 30-second length is what sets it apart: most models on Viralance stop at 8 to 15 seconds, and joining shorter clips leaves visible cuts where lighting or a face drift between takes.
It is newer than our production data window, so this page has no success rate for it yet; Kling 3.0’s numbers are on the Kling 3.0 page.
Lengths, resolutions and credits per clip
From the live catalog. The Generate button shows the exact cost before every run.
Kling 4.0
10–89 credits- Input
- Text, Image
- Length
- 5 / 10 / 15 / 30s
- Resolution
- 720p / 1080p
- Audio
- Yes
- In dollars
- $3.00–$26.70 on Mini
A credit costs $0.30 on the $9 Mini pack and $0.18 on the $299 Business pack. Credits never expire. See pricing, or compare the price per clip with every other model in the pricing dataset.
Kling 4.0 vs Kling 3.0 Standard
Kling 3.0 is the version before 4.0. The differences that change what you can make:
| Aspect | Kling 3.0 Standard | Kling 4.0 |
|---|---|---|
| Longest take | 15s | 30s |
| Lengths | 5 / 10 / 15s | 5 / 10 / 15 / 30s |
| Resolution | 1080p | 720p / 1080p |
| Native audio | Yes | Yes |
| Credits, 10 seconds | 14 (1080p) | 20 at 720p, 30 at 1080p |
Per second, Kling 3.0 Standard is cheaper at 1080p. Use Kling 4.0 when the shot needs more than 15 seconds without a cut, or when 720p is enough and you want the newer model.
Prompt tips for Kling 4.0
Plan the 30 seconds like a storyboard
List four or five beats with rough timing ("0–5s the door opens, 5–15s she walks to the window…"). A long take with one vague action looks slow.
Draft at 720p and 5 seconds
Check the look and the subject on a 10-credit 5-second clip before spending 89 credits on 30 seconds at 1080p.
Keep one location
Long takes hold together best in one place with one lighting setup. If the story moves somewhere else, make a second clip and join them in Film Studio.
Give dialogue room
A spoken line takes about as many seconds as it has words divided by three. Leave silence around it in the prompt ("pauses, then says…").
Kling 4.0 prompts to try
Copy one, or open it in the studio with the model already selected.
One continuous shot: a baker opens the shop at dawn, flips the sign, slides a tray of croissants into the window, then smiles at the first customer and says "Fresh out of the oven", street sounds and a door bell
Several beats and a line in one 30-second take.
Use this promptDrone shot follows a red kayak through a narrow canyon river, the walls open to a wide lake at sunset, paddles splash, wind and echo
A long tracking move at 1080p.
Use this promptHow to make a Kling 4.0 video
- 01
Open the studio with Kling 4.0
The link opens the create page with Kling 4.0 selected.
- 02
Pick length and resolution
Choose 5 / 10 / 15 / 30s and 720p or 1080p. The Generate button shows the exact credits before you spend.
- 03
Generate, then extend the story
Download the MP4, or add more shots in Film Studio for a longer film. If a generation fails or the model refuses the prompt, its credits are refunded automatically.
Kling 4.0 questions
How much does Kling 4.0 cost per video?
At 720p: 10, 20, 30 or 59 credits for 5, 10, 15 or 30 seconds. At 1080p: 15, 30, 45 or 89. A 30-second 720p clip is about $17.70 on the Mini pack ($9). Photo input costs the same as text.
How long can a Kling 4.0 video be?
Up to 30 seconds in one generation. For a longer video, join several clips in Film Studio.
Kling 4.0 or Kling 3.0?
Kling 4.0 for single takes over 15 seconds or a cheaper 720p option; Kling 3.0 Standard for 1080p clips of 5 / 10 / 15s, where it costs less per second (14 credits for 10 seconds against 30).
Does Kling 4.0 generate sound?
Yes. Speech, effects and ambience are generated with the picture. Describe them in the prompt; quoted words are spoken.
Is Viralance the official Kling 4.0 site?
No. Viralance is an independent platform that runs Kling 4.0 through fal.ai’s hosted model endpoints and bills per clip. It is not affiliated with or endorsed by Kuaishou.
Can I use Kling 4.0 clips commercially?
Yes. Clips you generate are yours to use commercially. Clips made before your first purchase carry a small Viralance watermark, which any credit pack removes from past and future clips.