Kling 4.0 Flash Video Generator
Turn a rough idea or a still photo into polished footage — Kling 4.0 Flash Video Generator handles 3–30 second clips in 4K with synced multilingual voices.
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Why the Kling 4.0 Model Stands Apart
Start from a written brief, a still frame or both. Kling 4.0 stretches a single request across three to thirty seconds and keeps every spoken line glued to the action, whatever the language.
- Built by Kuaishou, Landing After Kling 3.0A generation engine from Kuaishou that reads written prompts, stills and reference material, arriving on the scene right after Kling 3.0 and Kling 3.0 Turbo.
- One Run Covers Three to Thirty SecondsWhatever length you need inside that window comes back in a single pass, at 720p, 1080p or 4K, steered by as many as ten keyframes and fifteen Omni Reference inputs.
- Picture and Voice Share One WorkspaceOmni Reference gathers visual assets and recorded speech into a single working space, so multilingual dialogue lands on the right beat of the frame.
Three Steps From Idea to Finished Clip
Bring in your assets, describe what should happen, and review the first cut before you push the story further.
Why Kling 4.0 Flash Video Generator Handles Long, Detailed Shots
Half-minute scenes, a single budget of reference inputs, and speech that lands on the right frame every time.
Half a Minute in One Run
A single run carries a full beat — the setup, the main action and the payoff. When 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 frame for the destination — 21:9, 16:9, 1:1, 9:16 or Auto, whether that means a vertical social cut or a wide product reel.
Fifteen Reference Slots to Share
Stills, footage, voices and subject elements all draw from the same fifteen-slot budget: up to ten images, five clips totalling thirty seconds, or seven subject elements.
Voices That Travel Across Languages
Hand each speaker a voice sample and the render comes back in two-channel stereo, with the delivery matched to the moving image no matter the language.
Ten Keyframes to Anchor the Beats
Pin the moments that matter — a change of expression, a turn in the scene, the opening and closing frame — with as many as ten stills across a 3–30-second run.
Reshape Footage You Already Have
Send in up to five clips, one of them marked primary, to rework a face, a gesture, a backdrop or a look. Each runs 3–30 seconds and the total stays under thirty.
Everything Creators Ask About Kling 4.0 Flash Video Generator
How far the model reaches, how the input limits add up, and what to check before you hit generate.
How long can a single render be?
One pass covers three seconds through thirty. Anything longer belongs to the extension flow, so check the continuation options your plan offers instead of counting an extended piece as one run.
Do the reference limits add up?
Fifteen inputs is the shared ceiling. Stills stop at ten, footage at five clips totalling thirty seconds, subject elements at seven — and each of those numbers comes out of the same fifteen rather than stacking on top.
Will a voice sample carry dialogue in other languages?
It will. A sample shapes how a subject sounds, takes one of the fifteen slots, and pairs with cross-language lip and audio matching. Play the result back to check where each line lands.
Can it rework footage I already own?
Yes. Up to five clips go in, one flagged as primary, each sitting between three and thirty seconds. Added together they must stay inside the thirty-second total.
What is the keyframe allowance?
Ten at most. Use them to mark the beats you care about — a pose, a shift in the scene, a change of expression — and keep the subject and the lighting reading the same from frame to frame.
Where is the credit cost shown?
The generator spends the Kling Motion Control credits already on your account. The figure sits on the Generate button and updates as you change settings, so read it before you commit.
From First Draft to Final Cut With Kling 4.0 Flash Video Generator
Open the panel, drop in your references and check the credit cost shown on the button — then export a clip you can publish as it is.