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Kling 4.0 AI Video Generator
Craft 4K video clips up to 30 seconds from text, images, or reference assets — your scenes come alive with synced audio in any language.
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How the Kling 4.0 AI Video Generator Works
Developed by Kuaishou, the Kling 4.0 AI Video Generator takes your written ideas, photos, and reference files and transforms them into polished video. Through Omni Reference, visual and vocal inputs are processed together, keeping sound and imagery aligned no matter the language.
- Omni Reference MixingBlend photos, video clips, voice samples, and subject elements as Omni Reference inputs — up to 15 items shared across a single project.
- Synchronized Multilingual AudioDialogue stays locked to the visuals, while two-channel stereo output gives every speaker a distinct and recognizable voice.
- 3–30 Second Clips with Optional ExtensionOne generation produces a clip between 3 and 30 seconds; extra time is added through a separate extension pass rather than bundled into the original render.
Step-by-Step: Using the Kling 4.0 AI Video Generator
With the Kling 4.0 AI Video Generator, three straightforward steps take your raw material all the way to a review-ready, exportable video.
Inside the Kling 4.0 AI Video Generator: Core Capabilities
The Kling 4.0 AI Video Generator delivers longer runtimes, layered reference handling, and precise multilingual control over both sound and picture in one unified workflow.
Clips Up to 30 Seconds Long
One generation run produces up to thirty seconds of footage — enough time to build an opening, a middle section, and a wrap-up.
Flexible Resolution: 720p, 1080p, 4K
Choose 720p, 1080p, or 4K, and match your frame to the destination — 21:9, 16:9, 1:1, 9:16, or adaptive — spanning vertical social posts through wide-format product videos.
15 Omni Reference Slots Available
Combine photos, clips, voice samples, and subject elements within one 15-item budget — say, 10 images, or 5 clips totaling 30 seconds, or 7 subjects.
Language-Aware Voice References
Voice samples shape how each speaker sounds, while visuals and two-channel stereo remain perfectly synced across every language.
Up to 10 Adjustable Keyframes
Anchor up to 10 keyframe stills at the moments that matter, directing character appearance, scene transitions, and how each shot begins and concludes.
Precision Video Refinement
Adjust facial expressions, movement, environment, or overall style by supplying up to 5 clips — one designated as the primary take — each 3–30 seconds, with a combined total not exceeding 30 seconds.
Kling 4.0 AI Video Generator — FAQ
Answers covering duration, resolution, reference limits, editing options, credits, and API availability for the Kling 4.0 AI Video Generator.
Which clip lengths, resolutions, and aspect ratios can I generate?
Outputs span three to thirty seconds in duration and are available at 720p, 1080p, or 4K. HDR is configured independently of resolution — verify what your final delivery actually requires.
What is the maximum number of Omni Reference assets per project?
Fifteen is the combined maximum, applying equally to photos, video clips, voice samples, and subject elements. Per-category allowances draw from the same shared pool, so they cannot be added on top of one another.
Are voice samples included in the 15-asset quota?
Yes — voice samples consume from the same pool of fifteen. Audio and visuals remain synchronized across all languages, so it's worth reviewing how each line plays out once your clip finishes rendering.
How is targeted video refinement performed?
You can submit up to five clips, with one designated as the primary source. Each clip must be three to thirty seconds, and the total cannot surpass thirty. Specify which expression, movement, environment, or overall style you want altered.
How does Kling 4.0 differ from Kling 3.0 and Seedance 2.5?
Compare runtime limits, output resolution, accepted input types, and available controls. Kling 4.0 extends to thirty seconds while Kling 3.0 caps at fifteen, and it introduces ten keyframe positions alongside fifteen Omni Reference slots.
What credits apply, and is an API offered?
Existing credits from Kling Motion Control are accepted here, and the cost displayed on the generate button updates as you modify settings. Web access does not guarantee API availability — confirm model IDs, accepted inputs, and billing terms directly with your provider.
Start Using the Kling 4.0 AI Video Generator Today
Your existing Kling Motion Control credits work seamlessly here — review the displayed cost before generating, and keep the prompts that gave you the best results.