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Kling 4.0 AI Video Generator
Feed the Kling 4.0 AI Video Generator a prompt, a photo or a reference clip and get cinematic 4K footage with language-matched audio.
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A Closer Look at the Kling 4.0 AI Video Generator
Developed by Kuaishou, Kling 4.0 converts typed briefs, single frames and uploaded reference assets into finished footage. Omni Reference processes sight and sound in one pass, so dialogue and imagery stay aligned no matter which language is spoken.
- One-Pass Omni ReferenceStills, clips, voice recordings and character elements can be combined freely as Omni Reference inputs, drawing on one shared pool of fifteen items per project.
- Stereo Sound in Any LanguageSpoken lines land on the beat with the picture, while two-channel stereo output gives every character a voice you can pick out.
- Clips from 3 to 30 SecondsOne generation covers anywhere from three to thirty seconds; anything longer is added afterwards as its own extension pass rather than in the same run.
Three Steps with the Kling 4.0 AI Video Generator
Move from raw reference files to a checked, downloadable video in three short stages with Kling 4.0 — no editing background required.
What the Kling 4.0 AI Video Generator Can Do
Longer runtimes, stacked reference inputs and sound-and-picture control in any language — all inside one browser workspace.
Half-Minute Clips in One Pass
A single generation can reach thirty seconds, giving you space for an opening, a middle beat and a payoff.
720p, 1080p or 4K Delivery
Choose 720p, 1080p or 4K and pick a frame that fits — 21:9, 16:9, 1:1, 9:16 or Auto — covering vertical social cuts through to widescreen product films.
Fifteen Omni Reference Slots
Stills, footage, voice samples and character elements share one budget of fifteen — say ten images, or five clips totalling 30 seconds, or seven subjects.
Voices in Any Language
Uploaded voice samples shape how each speaker sounds, while the picture and the stereo mix remain locked together regardless of language.
Steer Up to 10 Keyframes
Pin the moments that matter with as many as ten keyframe stills, guiding a character's look, the point where the scene turns and how the shot opens and closes.
Precise Video Touch-Ups
Adjust expressions, motion, surroundings or overall style by supplying up to five clips — one serving as the main take — each 3–30 seconds and 30 seconds combined at most.
Kling 4.0 AI Video Generator: Common Questions
Answers on clip length, output quality, reference limits, editing, credits and API access for the Kling 4.0 AI Video Generator.
Which clip lengths, resolutions and aspect ratios can I choose?
Footage runs from three to thirty seconds, and you can export at 720p, 1080p or 4K. HDR sits outside the resolution setting, so check what your delivery channel actually needs.
Is there a cap on Omni Reference inputs?
Fifteen items in total, covering images, video, voice samples and character elements alike. Every category draws from that same pool, so the allowances cannot be stacked.
Do voice clips eat into the fifteen-item allowance?
Yes — they come out of the same pool of fifteen. Speech and picture stay in sync across languages, so it is worth listening back to each line once the render finishes.
What does targeted video editing actually do?
You may upload up to five clips, one of which is treated as the main take. Each must run between three and thirty seconds and the combined total cannot pass thirty; simply state which expression, movement, setting or style should change.
How does Kling 4.0 stack up against Kling 3.0 and Seedance 2.5?
Compare runtime, output quality, accepted inputs and the level of control on offer. Kling 4.0 stretches to thirty seconds where Kling 3.0 stops at fifteen, and brings ten keyframes plus fifteen Omni Reference slots.
What credits are required, and is there an API?
Credits already sitting in your Kling Motion Control account work here, and the figure on the generate button updates as you change settings. Web access does not guarantee API access — confirm model IDs, accepted inputs and billing with your provider.
Put the Kling 4.0 AI Video Generator to Work
Any Kling Motion Control credits you hold work here as-is. Watch the cost readout while you adjust settings, then save the prompts that gave you the best result.