Sample prompts for Kling 4.0
- Prompt 01
A detective in a trench coat walks through a rainy alley, stops under a flickering sign and lights a match, rain hissing on the pavement
Use this prompt - Prompt 02
Two friends share an umbrella crossing a busy Tokyo crosswalk at night, neon reflections, city noise and laughter
Use this prompt - Prompt 03
A knight removes her helmet on a windswept cliff, banners snapping in the wind, the camera circling around her
Use this prompt - Prompt 04
A toddler takes his first steps toward his father in a sunlit living room, everyone clapping and cheering
Use this prompt
Kling 4.0 always renders stereo sound and takes up to 10 reference images: use one picture per character to keep faces and outfits the same across the clip.
What Kling 4.0 can do on Revana
Kling 4.0 by Kuaishou starts from a text prompt, a starting picture, a first and a last frame, up to 10 reference pictures or a video to edit or continue and makes a video clip. Kling 4.0 is Kuaishou's newest Kling and the only Kling here that reaches 30 seconds; every clip has stereo sound. It works from text, a first and last frame, up to 10 reference images or a video you give it.
- Starts from
- a text prompt, a starting picture, a first and a last frame, up to 10 reference pictures or a video to edit or continue
- Clip length
- 3 to 30 seconds
- Resolutions
- 720p and 1080p
- Shapes
- 16:9, 9:16, 1:1 and 21:9
- Sound
- yes, at no extra cost a second
- Model id
kling-4.0
What Kling 4.0 costs
Kling 4.0 is billed per second of video from prepaid credit (100 credits = $1). The cheapest single request is one 3 second clip at 720p for $0.41; 720p is $0.135 a second, 1080p $0.20. You are charged only when the clip is made.
| Setting | Per second | 3 s clip | 10 s clip | 30 s clip |
|---|---|---|---|---|
| 720p | $0.135 | $0.405 | $1.35 | $4.05 |
| 1080p | $0.20 | $0.60 | $2.00 | $6.00 |
Kling 4.0 and other Kuaishou video models
Compared with Kling 3.0: At 720p Kling 4.0 is $0.135 a second against $0.09 for Kling 3.0; at 1080p Kling 4.0 is $0.20 a second against $0.12 for Kling 3.0; only Kling 3.0 offers 4K; Kling 4.0 goes up to 30 seconds and Kling 3.0 to 15; Kling 4.0 has sound at no extra cost and Kling 3.0 has sound as a paid option; Kling 4.0 takes up to 10 reference pictures and Kling 3.0 none; Kling 4.0 can also edit a video.
| Model | Cheapest clip | Longest | Up to | Sound |
|---|---|---|---|---|
| Kling 4.0 | $0.41 (3 s at 720p) | 30 s | 1080p | Yes |
| Kling 3.0 | $0.27 (3 s at 720p) | 15 s | 4K | Optional |
| Kling 2.1 Pro | $0.35 (5 s at standard) | 10 s | No | |
| Kling 2.1 Standard | $0.20 (5 s at 720p) | 10 s | 720p | No |
| Kling 3.0 Omni | $0.27 (3 s at 720p) | 15 s | 4K | Optional |
How to start
Sign in with Google or an email link, add credit under Billing (packs from $10), then open Generate, pick Kling 4.0, type a prompt (and add up to 10 reference pictures if you like) and press Generate. For code, the Kling 4.0 API page has every option and a request to copy.
Frequently asked questions
Is Kling 4.0 free?
Your first Kling 4.0 request is free with your first $10 top-up: when that payment goes through, we credit the cost of one 3 second clip at 720p ($0.41) to your account. The offer is for new accounts, one per account; you need a card for the top-up, and the $10 stays your credit for any model.
How much does one Kling 4.0 clip cost?
The cheapest is a 3 second clip at 720p for $0.41 ($0.135 a second); the longest, 30 seconds at 1080p, is $6.00.
How long can a Kling 4.0 video be?
Kling 4.0 makes clips of 3 to 30 seconds, at 720p and 1080p. You pay for the seconds you ask for, so a longer clip costs more.
Does Kling 4.0 make sound?
Yes. Kling 4.0 can render sound with the picture, and sound costs nothing extra: it is in the price a second.
Can Kling 4.0 go from a first frame to a last frame?
Yes. Give it a first and a last picture and it makes the motion between them; the prompt describes what happens on the way.
How many pictures can I give Kling 4.0?
Up to 10. Use them as references for characters, products or places, and say in the prompt what each one is for.
Can Kling 4.0 edit a video?
Yes. Give it a clip and a prompt; with a video input the price a second changes (see the Kling 4.0 API page), and the input clip's seconds are counted too.
Is there a waitlist or code needed for Kling 4.0?
Neither. Kling 4.0 runs from the Revana dashboard in your browser, with no subscription; developers send model id kling-4.0 to the API, and AI agents can use it through the Revana MCP server.
Make your first Kling 4.0 clip
Your first video is free. One account for Kling 4.0 and every other model on Revana, billed only for jobs that succeed.