Kling 4.0 Flash Video Generator
Generate cinematic 3–30 second clips in up to 4K from any text or photo. Kling 4.0 Flash Video Generator syncs multilingual voice to every frame.
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What the Kling 4.0 Flash Video Generator Brings to the Table
Hand the Kling 4.0 Flash Video Generator a written brief or a still image, and clips land anywhere between three and thirty seconds, with speech matched to the action in any language.
- Built by Kuaishou on the Kling LineageThis generation model comes from Kuaishou and accepts written briefs, still photos and reference clips as starting points, following on from Kling 3.0 and 3.0 Turbo.
- One Run, Three to Thirty Seconds, Up to 4KA single job returns clips from three seconds to half a minute at 720p, 1080p or 4K, steered by as many as 10 keyframes and 15 Omni Reference inputs.
- Omni Reference Unites Image and Voice InputsPicture assets and spoken assets sit inside the same pipeline, which lets dialogue in any language sync tightly with whatever happens on screen.
Three Steps With the Kling 4.0 Flash Video Generator
Add your assets, describe the shot you want, then review the first pass before extending the story.
Capabilities Packed Into the Kling 4.0 Flash Video Generator
Half-minute scenes, a single shared reference budget, and speech that keeps pace with every frame — all inside the Kling 4.0 Flash Video Generator.
Clips Up to Thirty Seconds Long
One job can hold a complete beat — the setup, the key action and the payoff. When a story runs longer, extend it rather than squeezing the idea into less time.
Output at Up to 4K Resolution
Choose 720p, 1080p or 4K, and frame for wherever it lands — 21:9, 16:9, 1:1, 9:16 or Auto, whether that is a tall social cut or a wide product reel.
A Shared Pool of Up to 15 Reference Assets
Photos, clips, voices and subject items all draw on one cap of 15. Inside it you can mix as many as 10 stills, 5 clips totalling 30 seconds, or 7 subject elements.
Multilingual Speech With Voice References
Assign a voice sample to every speaker and the result comes back in two-channel stereo, with lines matched to the moving image no matter the language.
Pin Down as Many as 10 Keyframes
Lock the beats that count — a shift in expression, a twist in the scene, the opening and closing frame — using up to 10 stills across a 3–30-second clip.
Surgical Video Editing
Supply as many as 5 clips, one marked as primary, to reshape a face, a gesture, a background or a visual style. Each clip lasts 3–30 seconds and the sum stays under 30.
Answers to Common Kling 4.0 Flash Video Generator Questions
What the model can do, how the input limits add up, and what to verify before you submit a job.
What is the maximum length of one Kling 4.0 clip?
A single run spans three to thirty seconds. Longer pieces come from the extension flow, so check the continuation options your provider offers instead of treating an extended video as a single pass.
What are the limits on reference inputs?
The overall cap is fifteen. Photos max out at 10, video clips at 5 for a combined 30 seconds, and subject items at 7 — all drawn from the same fifteen rather than added on top.
Do voice references support dialogue in multiple languages?
Yes. A voice sample shapes how a subject sounds, uses one of your fifteen slots, and works with cross-language lip and audio matching. Play it back to confirm where each line lands.
Can Kling 4.0 edit footage I already have?
It can. You may add up to 5 clips with one set as primary, each running between three and thirty seconds. Their combined length still has to stay within thirty seconds.
What is the keyframe image limit?
Ten at most. Use them to flag the moments that matter — a pose, a scene transition, a change of expression — while keeping the subject and the lighting consistent from frame to frame.
Where can I check the credit cost?
This generator draws on the Kling Motion Control credits already in your account. The amount shows on the Generate button and updates as you adjust settings, so read it before confirming.
Start Creating With the Kling 4.0 Flash Video Generator
Head to the panel above, load your references into the Kling 4.0 Flash Video Generator, and review the credit cost and usage terms shown before exporting a finished clip.