Kling 4.0 extends its maximum single video length to 30 seconds, set to launch in October.

Beating AI Express News: Kuaishou’s Kling teases Kling 4.0, with the official version set to launch in October. Kling 4.0 Flash is now available for experience exclusively to Black Gold Annual Card members. The new version has increased the maximum length of a single native video to 30 seconds, up from Kling 3.0’s previous maximum of 15 seconds. Its control capability has also been further enhanced: Kling 4.0 supports up to 10 keyframes, allowing users to pre-set character states, scene changes, and plot nodes. Images, videos, and subjects can be mixed as inputs, with a maximum of 15 multimodal references per generation. Video editing has been refined: users can directly modify characters, backgrounds, weather, colors, textures, and camera angles in the original video, or use another video as a reference to reuse its camera movement, actions, and narrative rhythm to generate new content. Audio-visual capabilities have also been upgraded: Kling 4.0 supports dual-channel stereo, and improves complex camera movements, lip-sync, and multilingual dialogue. 4K and 1080p 10-bit HDR outputs are planned but not yet available. The video also supports multiple retakes, extending up to 2 minutes, a feature that has not been launched yet. Kling 4.0 Flash prioritizes faster generation and lower cost, though the official has not released specific pricing and speed data. Both the official version and API are scheduled to roll out in October.