Text-to-Video · Image-to-Video

Kling 4.0 Flash

The fast, affordable tier of Kling 4.0. Turn a prompt or a single image into 720p video with native audio built in — dialogue, music, and sound effects generated with the picture — in any length from 3 to 20 seconds.

About the model

Kling 4.0 Flash

Kling 4.0 Flash is the speed-focused version of the Kling 4.0 generation. It renders crisp 720p video from a natural-language prompt — or animates a first-frame image — with native audio generated alongside the picture, so you can describe voices, music, and ambience right in your prompt. Choose any whole-second length from 3 to 20 seconds and four shapes, including cinematic 21:9.

Simple per-second pricing. Kling 4.0 Flash bills purely per second with no per-run fee — about 19 credits/second, so a 3-second test is just 57 credits and a 5-second clip is 94. Audio is always included. Need 1080p, clips up to 30 seconds, or last-frame and keyframe control? Try Kling 4.0.

Why choose this?

Native audio, always on

Speech, music, and sound effects generated in sync with the video — just describe them in your prompt.

Built for speed

The Flash tier of Kling 4.0 — quick turnaround for iterating on ideas.

Any length, 3–20 seconds

Pick the exact second count you need instead of fixed steps — and pay only for that length.

Cinematic 21:9 and more

Landscape, portrait, square, or ultra-wide 21:9 — or let image-to-video match your first frame.

Image to video

Upload a first frame and describe the motion, camera move, and sound you want.

No per-run fee

Priced purely per second with no per-run fee, so short tests stay cheap.

Kling 4.0 Flash Pricing (720p)

Duration	Credits	Duration	Credits	Duration	Credits
3s	57	4s	76	5s	94
6s	113	7s	132	8s	151
9s	170	10s	188	11s	207
12s	226	13s	245	14s	264
15s	282	16s	301	17s	320
18s	339	19s	358	20s	376

Cost is 18.8 credits per second, rounded up to the nearest whole credit, with no per-run fee. Output is 720p with audio included. Credits are only charged when a generation starts.

Choose your credit package

$3.00

300 credits

$0.0100 per credit

Buy Credits

$30.00

3,030 credits

$0.0099 per credit +30 bonus

Buy Credits

$100.00

10,300 credits

$0.0097 per credit +300 bonus

Buy Credits

$400.00

41,500 credits

$0.0096 per credit +1,500 bonus

Buy Credits

Transparent, pay-as-you-go

Bigger top-ups earn bonus credits. No subscriptions, no hidden fees — credits never expire.

Ready to create with Kling 4.0 Flash?

Create Account Sign In