Kuaishou’s Kling AI Launches Kling 4.0 Video Model With 30-Second Native Clips

The jump to 30-second native generation, rather than stitched shorter clips, is the substantive shift here: longer single-pass output is what makes AI video usable for narrative or commercial work rather than novelty loops. The 8,000-token prompt window and 4K/21:9/HDR output set point toward professional post-production workflows, where Kling competes with other generative video tools for creator and studio budgets. Whether longer native clips translate into consistent quality across complex motion remains the open question — that, not the spec sheet, determines adoption.