Kuaishou's Kling AI lineup has unveiled Kling 4.0 Preview, a major update that extends native video generation to up to 30 seconds per clip and introduces an experimental Long Video mode capable of producing continuous 120-second sequences at 1080p. Generated clips can also be extended to 60 seconds after the fact, addressing a common limitation of earlier versions where shorter runtimes complicated narrative and advertising planning. The update marks one of the largest capability jumps in the model's history, spanning clip length, reference handling, native resolution, and audio.
The centerpiece of the release is Omni Reference, a system that allows a single generation to draw on up to 15 reference elements from a pool of up to 50 uploaded files—30 images, 10 video clips, and 10 audio clips. This enables creators to lock a character's face across multiple shots, match a product's exact color from a reference photo, or carry a specific lighting setup from one scene to the next without re-describing those details in every prompt. Multi-shot generation runs on the same reference system, allowing a single prompt to produce a sequence of shots that maintain spatial continuity—a room stays the same room as the camera moves, and characters keep the same clothing and face across cuts. This continuity has historically been a weak point for AI video tools, where scenes often visibly reset when the camera angle changes.
On the audio front, dialogue, ambient sound, and music are generated in the same pass as the picture rather than layered on afterward, with lip movement synced to spoken lines across multiple languages and accents. Different lines can be assigned to different characters within the same scene, eliminating a manual dubbing step that previously required separate audio software. Native 4K output (3840×2160) rounds out the release, aimed at preserving fine texture, sharp edges, and depth of field through fast-motion shots rather than relying on post-generation upscaling—a distinction creators evaluating AI video tools have increasingly flagged as the real test of whether a clip survives the move from preview window to actual publish.
For those looking to explore the new capabilities, Kling 4.0 provides direct access to its generation modes as they roll out, including standard, Pro, and native 4K tiers. This allows creators, marketers, and small teams to begin testing prompt-to-clip workflows, persistent-character generation, and multi-shot sequencing as the preview becomes more broadly available. Additionally, a Kling 4.0 video prompt library offers practical starting points for creators developing their own scenes. The implications are significant: by integrating longer clips, robust reference handling, and synchronized audio, Kling 4.0 Preview reduces the friction in AI video production, making it more feasible for professional storytelling and advertising. As AI video tools become more capable, they are poised to disrupt traditional content creation workflows, enabling faster iteration and higher-quality outputs that could compete with conventional video production.
