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Kling 4.0 AI Video Generator
Turn a written prompt, a still or a reference clip into polished footage with the Kling 4.0 AI Video Generator — clips reach 30 seconds with synced audio.
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Kling 4.0 AI Video Generator: How It Works
Developed by Kuaishou, this model converts written prompts, photos and uploaded references into completed clips. Omni Reference processes visuals and voices side by side, so sound and image stay aligned whatever the language.
- Unified Omni Reference InputsStills, clips, voice samples and character elements can all be blended as Omni Reference inputs, capped at 15 items in total per project.
- Synced Speech in Any LanguageDialogue lands on the right beat against the picture, while two-channel stereo output keeps each speaker's voice separate and easy to follow.
- 3 to 30 Seconds Per PassOne run produces anything from three to thirty seconds; extra length is added afterwards as a separate extension step, not within the same job.
Using the Kling 4.0 AI Video Generator in Three Steps
Move from raw reference files to a finished, export-ready clip in three simple stages.
Core Capabilities of the Kling 4.0 AI Video Generator
Longer runtimes, stacked reference inputs and synchronized multilingual sound-and-picture control — all delivered through the Kling 4.0 AI Video Generator.
Clips Up to 30 Seconds Long
One run can reach half a minute, enough space for an opening, a middle turn and a closing shot.
720p, 1080p and 4K Options
Choose 720p, 1080p or 4K and match the frame to the channel — 21:9, 16:9, 1:1, 9:16 or Auto span vertical social clips through to widescreen product films.
15 Omni Reference Slots
Combine photos, video, voice samples and character elements inside a single pool of 15 — say 10 images, 5 clips totalling 30 seconds, or 7 characters.
Voice References in Many Languages
Audio samples shape how each speaker is voiced, while picture and two-channel stereo remain in step across languages.
Up to 10 Keyframe Controls
Pin the moments that matter with as many as 10 keyframe images, guiding a character's look, the timing of scene shifts and how the shot opens and closes.
Precision Video Editing
Rework expressions, movement, surroundings or overall style by supplying up to 5 clips — one acting as the main take — each lasting 3–30 seconds and capped at 30 seconds combined.
Kling 4.0 AI Video Generator: Frequently Asked Questions
Answers on runtime, resolution, reference limits, editing, credits and API access for the Kling 4.0 AI Video Generator.
Which durations, resolutions and aspect ratios can I use?
Footage lasts from three to thirty seconds, and you can export at 720p, 1080p or 4K. HDR is configured separately from resolution, so check what your final delivery actually needs.
What is the maximum number of Omni Reference assets?
Fifteen items is the overall ceiling, shared across photos, video, voice samples and character elements. Each category draws from that one pool, so the counts do not add up separately.
Are voice references included in the 15-asset cap?
Yes — they come out of the same pool of fifteen. Sound and image stay synchronized across languages, so review how each line lands once rendering finishes.
How does precision video editing function?
You may supply up to five clips, with one serving as the main take. Each must last 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 control options across the three. Kling 4.0 goes to thirty seconds while Kling 3.0 caps at fifteen, and it adds ten keyframes plus fifteen Omni Reference slots.
What credits are required, and is an API available?
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, supported inputs and billing with your provider.
Try the Kling 4.0 AI Video Generator Today
Your existing Kling Motion Control credits carry straight over — review the price shown before you generate, and keep the prompts that delivered the best results.