Kling 4.0 announced: 30-second 4K video, 10 keyframes and 15 references

Kuaishou’s AI video unit Kling AI announced its next-generation video model, Kling 4.0, on 27 September 2026. The model can generate clips ranging from 3 to 30 seconds in a single run, output at up to 4K, and be guided with up to 10 keyframes. The lightweight version, Kling 4.0 Flash, opened as a limited beta for top-tier annual subscribers on 28 September; the full release is planned for October.

What are Kling 4.0’s key features?

Kling 3.0 could generate clips up to 15 seconds long in a single run; the new version extends that limit to 30 seconds. Keyframe control has also expanded from just the start and end frames to up to 10 keyframes. According to sources compiling the announcement, the main technical specifications are:

The reference pool accepts images, video clips, saved elements and audio samples. According to the official technical table reported by Atlas Cloud, it can hold up to 10 images and 5 video clips with a combined duration of up to 30 seconds. Supported aspect ratios are 21:9, 16:9, 1:1, 9:16 and auto. Prompt length can reach up to 8,000 tokens.

For audio, the model generates two-channel stereo sound and lip sync. 10-bit HDR output at 1080p and 4K, as well as video extension for up to 2 minutes, are listed as “coming soon”—meaning they are not yet available.

What changes for architectural animation?

For archviz teams, a major drawback of video models has been the lack of control. It was possible to generate a short camera move from a façade or interior render, but directing the camera path and deciding what the scene shows at each moment was difficult. The limitation to start and end frames meant that longer walkthroughs had to be split into segments.

Kling 4.0’s support for 10 keyframes is significant here. In theory, a studio could create fixed keyframes in its own render engine for key moments along a transition—from the entrance to the living room, from the living room to the kitchen and then to the terrace—and give them to the model to fill in the motion between them. A 30-second duration is long enough to generate a single-piece project promo for social media or a short walkthrough for a client presentation.

Support for numerous references is also useful for maintaining consistency in materials and furniture. When renders of the same project from different angles are provided as references, the model is expected to interpret the scene more consistently. However, there is no guarantee that geometry will be preserved exactly in this kind of generation; video models can still distort architectural proportions and straight lines. For work requiring precise dimensions and proportions, conventional render-based animation should remain the primary method.

Access and pricing

The Flash version is currently available only as a limited beta to users with a top-tier annual subscription. No specific date has been given for the full release beyond October. Official pricing and the API timeline have also yet to be announced. Third-party platforms say they will add the model to their own interfaces after Kuaishou’s full release.

What’s happening on the company side?

According to sources summarizing Bloomberg’s report, the Kling unit raised $2.8 billion in July from Alibaba, Baidu and Tencent, reaching a valuation of around $18 billion. The unit is reportedly preparing for a potential Hong Kong IPO and competing directly with ByteDance’s Seedance model. Annualized revenue is reported to have exceeded $500 million as of March.

In short, Kling 4.0 is aiming to compete with models such as Seedance 2.5 and Wan3.0, which have also reached 30-second video generation. Independent tests accompanying the full release in October will show how useful it is in practice.

What can teams in Turkey expect?

Kling has been offered through a subscription-based web interface since its previous versions; existing subscribers can follow the access terms when the full release is announced. For now, however, the Flash beta is limited to top-tier annual subscribers, so users on monthly plans will have to wait for the full version.

The main points to watch during testing are clear: whether straight lines on walls and windows remain intact throughout the motion, whether material textures drift from frame to frame, and how smoothly the camera moves between keyframes. Since 10-bit HDR support is not available yet, teams that do color grading should also track when this feature is released. Likewise, once video extension for up to 2 minutes becomes available, it will be worth testing whether longer project films can be generated as a single continuous sequence.