Kling 4.0 launches: 30-second single-shot video, tested on motion and omni-reference

可灵 Kling 4.0 上线：支持30秒一镜到底，作者实测动态与全能参考

Kling AI released its Kling 4.0 video model, which generates clips up to 30 seconds in one shot and accepts up to 10 reference frames, with stronger omni-reference and large-scale motion. The author tested city chases, elevator fights and figure skating, and says details like a cardboard box deforming show better grasp of physics. A 30-second 1080P clip costs about 450 credits (roughly 16 yuan); 720P about 9 yuan; Kling 4.0 Flash 720P for 20 seconds is 120 credits. The company says 10-bit 4K HDR output is coming.

Why it matters: The hands-on test lists credit costs by resolution and length, giving a concrete reference for what long-shot video generation actually costs.