The Flash edition of the video generator is available immediately for Ultra Yearly subscribers, with the standard version arriving in October. The full Kling 4.0 model enables native 30 second video generations, while the Flash version supports up to 20 seconds. Technical specifications include 4K resolution, 10 bit HDR output, stereo audio, and improved lip synchronization, alongside control features allowing up to 10 keyframes and 15 multi modal references across images, video and audio.

The update adds capabilities for video extension and support for multiple languages, accents, and dialects. Users can now modify specific camera movements, visual styles, or backgrounds on existing clips without regenerating the entire video. The Flash model is designed for high frequency production environments that require faster generation speeds and higher cost efficiency.