Kling 4.0 to Launch in October With 10-Bit HDR and 30-Second Video Generation

In action and large-scale scenes, the review found that Kling 4.0 maintained camera movement without twitching or flashing during push-pull, pan-tilt, tracking and high-angle shots. In a wuxia-style bamboo forest sequence at dusk, the model rendered backlit golden light spots, leaves shaken by sword wind, sparks from clashing blades and the breathing feel of a fast lateral camera move, the review said. A rooftop fight test moved from a drone dive to a jump across a building gap and close handheld combat, and Kling 4.0 kept characters consistent through rapid cuts.

The model also adds 10-bit HDR and 4K or 1080P output, a specification the review said is rare among AI video tools. Most AI video models output 8-bit video, which can show banding, lost shadow detail and noise when color graded. Kling 4.0's 10-bit HDR carries four times more color information, with 1,024 gray levels per channel, allowing generated footage to be imported into DaVinci Resolve or Premiere Pro for streaming delivery standards, according to the review.

For dramatic scenes, the review said Kling 4.0 improved micro-expressions, eye movement and breathing. It can natively generate clips up to 30 seconds in a single pass, supporting long takes and continuous narrative so multiple plot points can connect. In a Taiwanese new cinema-style family dinner test, the model handled cold blue-gray natural light through window bars, film grain, Cantonese dialogue and the awkward atmosphere of a family meal. It supports nine languages: Chinese, English, Japanese, Korean, Spanish, Portuguese, German, French and Hindi, along with accents and dialects including Beijing, Taiwan, Northeast China, Sichuan, Cantonese, American English, British English and Indian English. Lip matching, voice and performance were synchronized, with two-channel stereo providing spatial audio, the review said.

Control features are another focus. Kling 4.0 supports up to 15 reference materials per task, combining as many as 10 images, five videos, seven subjects and three video subjects. Users can input subject images, three-view images, grids, keyframes, wireframes and videos to reference character performance, camera movement or narrative rhythm. In a West Coast summer road movie test, the review used up to 10 keyframes to set character states and plot points, with a cream convertible under harsh noon sun, jump cuts of friends laughing, symmetrical street reflections on the windshield and palm trees in the rearview mirror. Kling 4.0 also supports a 21:9 ultra-wide frame close to the 2.35:1 Hollywood widescreen ratio, and covers styles including cinematic, animation, fantasy, pixel, felt, 3D cyber, Vlog and realistic documentary.

Text generation is another upgrade: the model can render multilingual text, emoji and logos clearly and stably, even during motion and scene changes, the review said. Kling 4.0 Flash is aimed at high-frequency creation with faster generation and lower cost. It also offers precise video editing for character expressions, body movements, camera positions, overall style and backgrounds, and creative replication that borrows narrative rhythm and shot arrangement from a reference video while replacing products and characters.

The review places Kling 4.0 in a broader shift toward professional filmmaking. It mentioned that the AI short film Paper Phone, created by two young people from Chaoshan with Kling AI 3.0 Omni, has been viewed more than 100 million times and reposted by CCTV and People's Daily. It also cited comments from film scholar Dai Jinhua that she did not regret not joining the film industry because filmmaking is collective and requires a kind of governance, which she rejects. The review argued that AI reduces communication costs for creators who prefer to work alone, allowing them to build an all-in-one production team with the model and rely less on compromise.

Editor's Summary

Kling 4.0 is set for an October launch with 10-bit HDR, 4K or 1080P output, up to 30-second native generation and multilingual lip-sync, while Kling 4.0 Flash is already in limited trials. The update pushes AI video toward professional post-production and controlled, long-form narrative work. Its adoption will depend on whether creators can use its reference and editing tools to produce consistent, film-grade output.