Kling 4.0 Flash Video Generator
Create cinematic 4K clips with the Kling 4.0 Flash Video Generator — start from text or a photo, add 15 references, and get synced multilingual voices.
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Kling 4.0 Flash Video Generator: Built for Real Scenes
Feed it a written idea or a still image, choose a length between three and thirty seconds, and let the model keep every spoken line aligned with the action.
- The Engine Behind the Tool: Kling 4.0 from KuaishouDeveloped by Kuaishou, this engine reads written prompts, stills and reference material, and follows on from the earlier Kling 3.0 and Kling 3.0 Turbo releases.
- One Run, Three Seconds to Thirty, in 720p, 1080p or 4KA single render delivers between three seconds and half a minute, with as many as 10 keyframes and 15 Omni Reference inputs steering the result.
- One Omni Reference Flow for Pictures and VoicesVisual assets and voice samples share a single workspace, which keeps dialogue in any language matched to the on-screen action.
Three Steps with the Kling 4.0 Flash Video Generator
Add your assets, describe the moment you want, then review the first render before extending the story.
Core Capabilities of the Kling 4.0 Flash Video Generator
Half-minute scenes, a single pool of reference material and speech that tracks the moving image.
Scenes Up to 30 Seconds Long
One render covers a complete beat — the setup, the action and the payoff. When the story demands more room, keep going through the extension flow instead of squeezing the idea.
Output as High as 4K
Choose 720p, 1080p or 4K, then frame for the destination — 21:9, 16:9, 1:1, 9:16 or Auto, whether that is a vertical social cut or a wide product showcase.
As Many as 15 Reference Assets
Stills, footage, voices and subject elements all come out of a single pool of 15. Inside that limit you can load up to 10 images, 5 clips totalling 30 seconds, or 7 subject elements.
Voice Clips in Any Language
Assign a sample to every speaker and the render comes back in two-channel stereo, with each line synced to the picture no matter which language it is spoken in.
Pin Down as Many as 10 Keyframes
Lock the beats that matter — an expression shift, a turn in the scene, the opening and closing frame — using up to 10 stills across a 3–30-second render.
Precise Edits to Existing Footage
Bring in up to 5 clips, one marked as primary, to rework a face, a gesture, a backdrop or a colour grade. Each clip lasts 3–30 seconds and the combined total must stay under 30.
Kling 4.0 Flash Video Generator: Common Questions Answered
What the model can do, how the input limits add up, and what to check before you hit generate.
What is the longest clip I can make in one go?
A single render covers anything from three to thirty seconds. Longer stories belong to the extension flow, so check which continuation options your plan includes instead of treating an extended sequence as one pass.
How are the reference limits counted?
Everything shares one ceiling of 15. Images top out at 10, footage at 5 clips totalling 30 seconds, and subject elements at 7 — those figures are drawn from the same 15 rather than added on top of it.
Will voice samples produce dialogue in other languages?
Yes. A sample shapes how a subject sounds, uses one of the fifteen slots, and works together with cross-language lip and audio matching. Watch the render back to confirm each line lands where you expect.
Can I edit video I already own?
It can. You may supply up to 5 clips with one flagged as primary, and each has to run between three and thirty seconds. Combined, they still have to fit inside the thirty-second total.
What is the maximum number of keyframes?
Up to ten. Place them on the moments that matter — a pose, a shift in the scene, a change of expression — and keep the subject and the lighting reading consistently from frame to frame.
How do I know what a render will cost?
This tool draws on the Kling Motion Control credits already sitting in your account. The amount shows on the Generate button and updates whenever you change a setting, so check it before you commit.
Your Next Scene Starts with the Kling 4.0 Flash Video Generator
Head to the panel above, drop in your references, and confirm the credit cost and usage terms shown before you export a finished clip.