Kuaishou has previewed Kling 4.0, with the full release and API both scheduled for October. Ahead of that launch, Kling 4.0 Flash has already been opened to Black Gold annual membership users for early access. The update raises the maximum length of a single native video generation to 30 seconds, up from the 15-second cap in Kling 3.0.
The new version also expands control options. It supports up to 10 keyframes, allowing users to preset character states, scene transitions, and plot beats. Image, video, and subject inputs can be combined, with support for as many as 15 multimodal references in one generation. Editing tools have also been extended, letting users change people, backgrounds, weather, colors, materials, and camera shots in an existing video, or use another clip as a reference for camera movement, motion, and narrative pacing.
Kling 4.0 adds dual-channel stereo and improves handling of complex camera movement, lip sync, and multilingual dialogue. Kuaishou said 4K and 1080p 10-bit HDR output are planned but not yet available. Multi-step continuation, which could extend a video to as long as two minutes, has also not gone live. The company has not disclosed pricing or speed figures for Kling 4.0 Flash.
Kuaishou has previewed Kling 4.0, with the official release set for October. Kling 4.0 Flash has already been opened for early access to Black Gold annual membership users.
The update lifts the maximum length of a single native video generation to 30 seconds. In Kling 3.0, the previous cap was 15 seconds.
Longer clips and more control options
Kling 4.0 supports up to 10 keyframes, giving users a way to preset character states, scene changes, and plot points. It also allows mixed inputs across images, video, and subjects, with up to 15 multimodal references in a single generation.
More granular video editing tools
Users can directly modify people, backgrounds, weather, colors, materials, and camera shots in an original video. They can also use another video as a reference and reuse its camera movement, motion, and narrative pacing to generate new content.
Audio and visual upgrades
Kling 4.0 adds dual-channel stereo and strengthens support for complex camera movement, lip sync, and multilingual dialogue.
Kuaishou said 4K and 1080p 10-bit HDR output are in the pipeline, but those options are not yet available. The platform also plans to support repeated continuation of a video, extending total length to as much as two minutes, though that feature has not launched either.
Flash version focuses on speed and lower cost
Kling 4.0 Flash is positioned around faster generation and lower cost, but the company has not released specific pricing or speed figures. The full version and the API are both scheduled to arrive in October.
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