Kling 4.0: 30-second clips, ten keyframes, full launch in October

Kling AI has announced Kling 4.0, the next generation of its video model, on 30 September. Early access to the new creation experience began rolling out to a limited group of users on 28 September, as Kling 4.0 Flash; the full model is due in October 2026.

Longer clips with more control

4.0 generates video natively from 3 to 30 seconds, twice the 15 seconds Kling 3.0 reached. It supports up to ten keyframes — images the clip has to pass through at chosen moments — on top of the start and end frames 3.0 already had.

Picture and sound

Output goes up to 4K, and 4.0 adds the 21:9 ultrawide frame. Kling says 10-bit HDR at 1080p and 4K is coming soon. Audio moves to two-channel stereo, and the spoken languages add Portuguese, German, French, Hindi and others to Chinese, English, Japanese, Korean and Spanish.

References

One generation can take up to fifteen reference assets combined, including up to five reference videos. Text-to-video, image-to-video, references, continuation and editing now live in a single workflow rather than separate tools.