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Kling 4.0 AI Video Generator
Craft cinematic clips of up to 30 seconds in 4K from a prompt or a still — this Kling 4.0 AI Video Generator keeps voice and picture in sync across languages.
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Getting to Know the Kling 4.0 AI Video Generator
Kuaishou's Kling 4.0 converts typed prompts, still frames and uploaded reference assets into polished footage. Omni Reference processes sight and sound in one pass, so speech stays locked to the picture no matter the language.
- Unified Omni Reference InputsPhotos, video, voice samples and character elements all mix as Omni Reference material, capped at 15 entries for any one project.
- Language-Matched Audio in StereoDialogue hits its cue alongside the action, while two-channel stereo keeps every speaker easy to tell apart.
- Runs of 3–30 Seconds, Extended on DemandOne generation spans three to thirty seconds; any extra length is added afterwards as a separate extension pass.
Using the Kling 4.0 AI Video Generator, Step by Step
Follow three short steps to move from raw reference material to a reviewed clip you can export.
What the Kling 4.0 AI Video Generator Can Do
Longer runtimes, stacked reference layers and voice-and-picture control that works in any language — all built into the Kling 4.0 AI Video Generator.
Clips That Reach 30 Seconds
One run can last half a minute, enough for an opening, a turn in the middle and a payoff.
720p, 1080p or 4K Delivery
Choose your resolution, then frame for where it will live — 21:9, 16:9, 1:1, 9:16 or Auto, from vertical social cuts to widescreen brand films.
15 Omni Reference Slots to Share
Blend photos, video, voice and character elements inside one pool of 15 — say 10 images, or 5 clips totalling 30 seconds, or 7 subjects.
Voice References in Any Language
Sample audio defines how each speaker sounds, and the visuals plus two-channel stereo hold their timing whatever the language.
Steer Up to 10 Keyframes
Pin the moments that matter with up to 10 still keyframes, shaping a character's appearance, the timing of scene changes and how the shot begins and ends.
Precision Edits on Video
Adjust expressions, movement, surroundings or overall style by supplying up to 5 clips — one as the main take — each 3–30 seconds and no more than 30 seconds combined.
Common Questions About the Kling 4.0 AI Video Generator
Straight answers on clip length, resolution, 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?
Anywhere from three to thirty seconds, with output at 720p, 1080p or 4K. HDR sits outside the resolution setting, so double-check what your final delivery really needs.
What is the limit on Omni Reference assets?
Fifteen entries in total, shared across photos, video, voice samples and subject elements. Every category draws from that one pool, so the numbers cannot be added together.
Are voice references included in the 15-asset cap?
Yes — they come out of the same fifteen. Sound and image remain aligned whatever the language, so it pays to review each spoken line after rendering.
What does targeted video editing involve?
Send in up to five clips, one serving as the main take. Each must run three to thirty seconds and the combined total cannot pass thirty; then name the expression, motion, setting or style you want altered.
Where does Kling 4.0 sit next to Kling 3.0 and Seedance 2.5?
Compare them on runtime, output quality, accepted inputs and the level of control each gives you. Kling 4.0 stretches to thirty seconds where Kling 3.0 caps at fifteen, and brings ten keyframes plus fifteen Omni Reference slots.
What credits are required, and can I call an API?
Your existing Kling Motion Control credits work here, and the price shown on the generate button updates as you change settings. Web access does not guarantee an API — confirm model IDs, accepted inputs and billing with your provider.
Put the Kling 4.0 AI Video Generator to Work
Your Kling Motion Control credits transfer without any extra setup — glance at the price before generating, and keep the prompts that worked best.