Kling 4.0 Flash Video Generator
Kling 4.0 Flash Video Generator turns a written idea or photo into 30-second 4K clips with 15 references, 10 keyframes and synced multilingual voices.
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Kling 4.0: A New Standard for AI Video
Hand it a written brief or a single photo and Kling 4.0 covers anything from three seconds to half a minute, with speech that stays locked to the picture in any language.
- Built by Kuaishou, the Team Behind KlingThis is the next step in the Kling line after 3.0 and 3.0 Turbo, and it takes written briefs, still frames and reference material as its starting point.
- One Pass, Three Seconds to Thirty, Up to 4KA single render can run from three seconds to half a minute at 720p, 1080p or 4K, steered by as many as ten keyframes and fifteen reference inputs.
- One Reference Pool for Both Picture and VoiceVisual material and spoken samples share a single workspace here, which is how dialogue in any language ends up matching the action on screen.
Three Steps to Your First Kling 4.0 Clip
Bring in your references, describe the shot, then review the draft before you build out the rest of the scene.
Core Capabilities of Kling 4.0
Half-minute scenes, a single shared pool of reference inputs, and speech that never drifts out of step with the picture.
Scenes That Run Up to 30 Seconds
One render can hold an entire beat — the setup, the main action and the payoff. If your story needs more room, carry it forward through the extension flow instead of squeezing the idea down.
Output as High as 4K
Choose 720p, 1080p or 4K, then frame for wherever it will live: 21:9, 16:9, 1:1, 9:16 or Auto, whether that's a vertical social cut or a wide product film.
As Many as 15 Reference Assets
Stills, footage, voice samples and subject elements all come out of the same pool of fifteen. Inside it you can place up to 10 images, 5 clips totalling 30 seconds, or 7 subject elements.
Voices and Audio Across Languages
Hand each speaker a voice sample and the finished file comes back in two-channel stereo, with the words tracking the movement on screen no matter the language.
Pin Down as Many as 10 Keyframes
Lock the beats that carry weight — a shift in expression, a turn in the story, the opening and closing frame — using up to ten stills across a run of three to thirty seconds.
Editing Aimed at Specific Details
Bring in up to five clips, with one marked as primary, to rework a face, a gesture, a backdrop or an overall look. Each clip spans three to thirty seconds and the combined length stays under thirty.
Common Questions About Kling 4.0
What the model handles, how the input limits stack up, and what to double-check before you send a job.
How long can a single Kling 4.0 render be?
One render spans three to thirty seconds. Anything longer is handled by the extension flow, so check what continuation options your plan includes instead of treating a stitched result as a single pass.
How are the reference limits counted?
All inputs share one ceiling of fifteen. Images top out at 10, footage at 5 clips totalling 30 seconds, and subject elements at 7 — but those numbers are drawn from the same fifteen rather than added on top of one another.
Can voice samples drive dialogue in other languages?
Yes. A sample shapes how a subject sounds, takes up one of the fifteen slots, and works together with cross-language lip-sync and audio alignment. Watch the clip back to confirm where each line falls.
Can Kling 4.0 rework footage I already own?
It can. You may supply as many as five clips, name one as primary, and each must fall between three and thirty seconds. Combined, they still have to fit inside the thirty-second total.
What's the maximum number of keyframes?
Ten. They are best used to mark the moments that matter — a pose, a turn in the scene, a change of expression — while keeping the subject and the lighting consistent from one frame to the next.
Where can I check the credit cost?
This tool draws on the Kling Motion Control credits already sitting in your account. The amount shows on the Generate button and updates as you adjust settings, so read it before you hit send.
Ready to Put Kling 4.0 Flash to Work?
Head to the panel above, drop in your references, and review the credit cost and usage terms shown before you export a finished clip.