Kling 4.0 AI Video Generator

Kling 4.0 is Kuaishou’s next-generation AI video model, designed for more realistic motion, stronger creative control, and longer-form storytelling. It supports text-to-video, image-to-video, multi-keyframe control, Omni Reference, stereo audio, and multimodal video editing in a unified workflow.

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The full Kling 4.0 model supports native video generation from 3 to 30 seconds in a single generation. Kling 4.0 Flash supports videos up to 20 seconds. Kling has also announced video extension for longer sequences, with availability depending on the rollout.

Yes. Kling 4.0 supports 720p, 1080p, and 4K output. Check the available settings for your selected mode before generating.

Kling 4.0 expands on Kling 3.0 with native video generation up to 30 seconds instead of 15 seconds, up to 10 keyframes, richer multimodal reference control, two-channel stereo audio, expanded multilingual support, and more integrated multimodal video editing.

Kling 4.0 was announced on September 30, 2026. Kling 4.0 Flash entered early access on September 28, and the full Kling 4.0 model became available on October 15, 2026.

Yes. Kling 4.0 supports both text-to-video and image-to-video generation. Images can also be used as multimodal references to guide subjects, composition, visual style, key moments, and other elements of the generated video.

Yes. Kling 4.0 supports two-channel stereo audio with improved audiovisual synchronization and lip-sync. Its unified workflow is designed to coordinate visual and audio elements within the same video generation process.

Kling 4.0 supports up to 10 flexible keyframes in a single video generation. Keyframes can guide important moments such as character actions, scene transitions, camera movement, product reveals, and other story beats across the timeline.

Kling 4.0 supports up to 10 reference images and up to 5 reference videos, with reference videos totaling up to 30 seconds. A single generation can use up to 15 combined reference assets across supported reference types.

Kling 4.0 supports 21:9, 16:9, 1:1, and 9:16 aspect ratios, plus an Auto option. These formats cover cinematic widescreen, standard landscape, square, and vertical video creation.

Yes. Kling 4.0 supports multimodal video editing for targeted changes to subjects, expressions, body movement, camera position and motion, backgrounds, visual style, and other scene elements. The full model supports up to five input video clips in one editing task, with a combined input duration of up to 30 seconds.

Kling40.app is a multi-model AI video generation platform focused on Kling 4.0 while also offering other AI video models, such as Wan, for different creative needs. Users can choose from available models to generate videos from text or images, compare their capabilities, and select the best option for each project.