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Kling 4.0 AI Video Generator
Type a prompt, drop a photo or a reference clip — the Kling 4.0 AI Video Generator returns 4K footage up to 30 seconds with voice and picture locked together.
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A Closer Look at the Kling 4.0 AI Video Generator
Kuaishou's Kling 4.0 model converts typed prompts, photographs and uploaded reference assets into completed footage. Omni Reference processes sight and sound in one pass, keeping speech locked to the visuals no matter which language is spoken.
- One Shared Reference PoolStills, moving footage, voice recordings and subject elements mix freely as Omni Reference inputs — the whole project is capped at 15 items.
- Dialogue Locked to the FrameEach spoken line lands on the beat it belongs to, while two-channel stereo keeps every character audibly distinct.
- 3–30 Seconds, Then ExtendOne render covers anything from three to thirty seconds — pushing past that becomes its own extension job, handled apart from the first generation.
Three Steps with the Kling 4.0 AI Video Generator
Go from raw reference material to a checked, export-ready video in three short steps.
Standout Capabilities of the Kling 4.0 AI Video Generator
Longer runtimes, stacked reference inputs and voice-plus-vision control in any language — all delivered by Kling 4.0.
Runs as Long as 30 Seconds
A single render stretches to half a minute, enough space for an opening, a middle beat and a payoff.
Output in 720p, 1080p or 4K
Choose 720p, 1080p or 4K, then frame for the channel — 21:9, 16:9, 1:1, 9:16 or Auto handle everything from vertical social cuts to widescreen product films.
As Many as 15 Omni Reference Items
Stills, clips, voice samples and subject elements share one budget of 15 — say 10 pictures, or 5 clips totalling 30 seconds, or 7 subjects.
Voice Cues in Any Language
Sample recordings shape how each speaker sounds, while the picture and two-channel stereo hold together whatever language is spoken.
Up to 10 Keyframes for Precision
Pin the moments that matter with as many as 10 still keyframes, dictating a character's appearance, the timing of a scene change and how a shot opens or closes.
Surgical Edits to Existing Footage
Rework a face, a movement, a location or the overall grade by supplying up to 5 clips — one acting as the main take — each 3–30 seconds and 30 seconds in total at most.
Kling 4.0 AI Video Generator: Your Questions Answered
Answers on clip length, output quality, reference limits, editing, credit costs and API access for Kling 4.0.
Which clip lengths, resolutions and aspect ratios can I choose?
Footage runs from three up to thirty seconds and renders at 720p, 1080p or 4K. HDR sits in a separate setting from resolution, so double-check what your final delivery actually needs.
What is the cap on Omni Reference assets?
Fifteen entries in total, and that single pool covers pictures, footage, voice samples and subject elements alike. Because each category draws from the same fifteen, the limits cannot be stacked on top of one another.
Are voice references included in the 15-asset ceiling?
Yes — they come out of the same pool of fifteen. Speech and visuals stay aligned across languages, so it pays to listen closely to how each line lands once rendering finishes.
What does targeted video editing actually do?
Supply up to five clips, one of which serves as the main take. Each must run between three and thirty seconds and the group cannot exceed thirty in total; then state which expression, motion, setting or look should change.
Where does Kling 4.0 sit next to Kling 3.0 and Seedance 2.5?
Weigh runtime, output quality, accepted input types and the degree of control each model gives you. Kling 4.0 stretches to thirty seconds where Kling 3.0 tops out at fifteen, and it adds ten keyframes along with fifteen Omni Reference slots.
What credits are required, and can I call an API?
The Kling Motion Control credits already in your account work here, and the figure on the generate button updates as you change settings. Web access does not guarantee an API — confirm model IDs, supported inputs and billing with your provider.
Put the Kling 4.0 AI Video Generator to Work
Your existing Kling Motion Control credits apply without conversion — review the price on screen before generating, and keep a note of the prompts that worked best.