Kling 4.0 Flash Video Generator
Fifteen Omni Reference inputs, ten keyframes and synced multilingual audio — the Kling 4.0 Flash Video Generator builds a 4K scene up to 30 seconds long.
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What Sets This Text to Video Model Apart
Give it a written brief, a still frame or a voice clip — the Kling 4.0 Flash Video Generator keeps faces, motion and spoken lines aligned throughout.
- The Kling 4.0 Engine, Built by KuaishouKuaishou's follow-up to Kling 3.0 and 3.0 Turbo takes written prompts, still frames and reference material as its starting point, then builds the shot from there.
- One Pass, Three Seconds to Half a MinuteEach run lands anywhere between three and thirty seconds, delivered in 720p, 1080p or 4K, with as many as ten keyframes and fifteen Omni Reference inputs steering the result.
- Omni Reference Holds Sight and Sound TogetherVisual assets and voice samples share a single workspace, which is why dialogue in any language lands on the right beat of the action.
From First Idea to Finished Clip in Three Steps
Bring in your references, spell out what happens on screen, and review the draft before you extend the story.
Where This AI Video Generator Pulls Ahead
Long takes, one shared pool of reference inputs, and spoken lines that never drift from the action on screen.
Scenes That Run to 30 Seconds
One run holds a complete beat — the setup, the main action and the payoff. If the story needs more room, extend it rather than squeezing the idea into a shorter cut.
Output All the Way to 4K
Choose 720p, 1080p or 4K and match the frame to where it will run: 21:9, 16:9, 1:1, 9:16 or Auto, whether that's a vertical social cut or a widescreen product reel.
Fifteen Reference Slots to Work With
Stills, footage, voices and character elements all draw from the same pool of fifteen. Inside that budget you can spend up to ten images, five clips totalling thirty seconds, or seven subject elements.
Voices That Match the Picture in Any Language
Hand each speaker a voice sample and the render comes back in two-channel stereo, with the delivery timed to the action no matter which language you use.
Ten Keyframes for the Beats That Matter
Pin the turning points — a shift in expression, a new angle, the opening and closing frame — using as many as ten stills spread across a three-to-thirty-second run.
Reshape Footage You Already Have
Send in up to five clips, naming one as the primary, to rework a face, a gesture, a background or a colour grade. Each source runs three to thirty seconds and the combined total stays under thirty.
Straight Answers About the Kling 4.0 Flash Video Generator
What the model can do, how the input limits add up, and what to check before you press Generate.
How long can a single Kling 4.0 clip be?
One pass covers three to thirty seconds. Anything longer comes from the extension flow, so check which continuation options your plan includes instead of treating a stitched sequence as a single run.
How do the reference limits actually add up?
Fifteen is the overall cap. Within it, stills top out at ten, footage at five clips totalling thirty seconds, and subject elements at seven — these are slices of the same fifteen, not extras layered on top.
Can a voice sample drive dialogue in other languages?
Yes. A voice sample shapes how a subject sounds, takes up one of the fifteen slots, and works with cross-language lip and audio matching. Play the render back to confirm where each line lands.
Can it rework footage I already own?
It can. Up to five clips go in with one marked as primary, each between three and thirty seconds, and together they have to stay inside the thirty-second ceiling.
How many keyframes am I allowed to place?
Ten at most. Use them on the beats that matter — a pose, a scene change, a new expression — and keep the subject and the lighting consistent from one frame to the next.
Where can I see what a render will cost?
The generator draws on the Kling Motion Control credits already in your account. The amount shows on the Generate button and updates as you change settings, so read it before you commit.
Your First Kling 4.0 Scene Is One Prompt Away
Open the panel above, drop in your references, and check the credit estimate and usage terms before you export the final cut.