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Kling 4.0 AI Video Generator
Describe the shot or drop in a still — the Kling 4.0 AI Video Generator returns a 4K clip of up to 30 seconds with voices matched to your language.
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A Closer Look at the Kling 4.0 AI Video Generator
Developed by Kuaishou, this model converts plain text, single frames and uploaded references into ready-to-watch footage. Omni Reference handles visuals and speech side by side, keeping sound locked to picture whichever language the dialogue uses.
- Unified Omni Reference InputsPhotos, clips, voice samples and character elements can all be blended as Omni Reference material, sharing one ceiling of 15 items per project.
- Language-Matched Audio in StereoSpoken lines land on the beat with the visuals, while two-channel stereo output gives every character a voice you can tell apart.
- Three to Thirty Seconds per PassOne run produces anything from three to thirty seconds; lengthening the story afterwards happens as a separate extension step, not inside the same generation.
Using the Kling 4.0 AI Video Generator, Step by Step
Follow three short stages to move from raw reference files to a finished clip you have checked and can export.
Kling 4.0 AI Video Generator Feature Highlights
Longer runtimes, stacked reference inputs and language-aware control over both sound and image — every one of them built into the Kling 4.0 AI Video Generator.
Runs of Up to 30 Seconds
A single pass can reach half a minute, which leaves space for an opening, a middle beat and a closing.
Output at 720p, 1080p or 4K
Choose 720p, 1080p or 4K and frame for the platform — 21:9, 16:9, 1:1, 9:16 or Auto span vertical social posts through to widescreen product films.
Up to 15 Omni Reference Items
Blend stills, footage, voice samples and character elements inside one shared budget of 15 — say 10 images, or 5 clips adding up to 30 seconds, or 7 subjects.
Voice References in Any Language
Voice samples shape how each speaker sounds, while picture and two-channel stereo stay locked together across languages.
Up to 10 Keyframes Under Your Control
Mark the moments that matter with as many as 10 keyframe stills, guiding a character's look, the point where the scene turns and how the shot opens and closes.
Precision Video Editing
Adjust facial expressions, motion, settings or overall look by supplying up to 5 clips, one of them the main take, each running 3–30 seconds and no more than 30 seconds combined.
Questions About the Kling 4.0 AI Video Generator
Answers on clip length, resolution, reference limits, editing, credits and API access for the Kling 4.0 AI Video Generator.
What clip length, resolution and aspect ratio can I use?
Footage runs from three to thirty seconds and can be delivered at 720p, 1080p or 4K. HDR is configured separately from resolution, so check what your final delivery actually requires.
How many Omni Reference items am I allowed?
Fifteen is the shared ceiling, and it covers images, footage, voice samples and character elements alike. Per-category figures all come out of that same pool, so they cannot be stacked.
Are voice references included in the 15-item limit?
Yes — they come out of the same pool of fifteen. Audio and picture stay synchronized whatever the language, so it is worth checking how each line lands once rendering finishes.
How does precision video editing work?
You may supply up to five clips, with one acting as the main take. Each has to sit between three and thirty seconds, and together they cannot pass thirty; state which expression, motion, setting or look 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 each model gives you. Kling 4.0 reaches thirty seconds where Kling 3.0 stops at fifteen, and adds ten keyframes plus fifteen Omni Reference slots.
What credits are required, and is there an API?
Credits already held on Kling Motion Control can be used here, and the price shown on the generate button updates as you change settings. Web access does not imply API availability — confirm model IDs, supported inputs and billing with your provider.
Start Creating with the Kling 4.0 AI Video Generator
Your existing Kling Motion Control credits carry over without conversion — glance at the price before you generate, and keep the prompts that worked best.