Updates·September 30, 2026, 02:00

Kling 4.0 can generate 30-second AI video in 4K, but pricing is unknown

AI-generated from the sources listed, with automated source checks.

Kling AI has announced its new video model Kling 4.0, which according to fal.ai can generate up to 30 seconds of video in a single pass. The full model is planned for October 2026, and pricing has not been published.

The Chinese company Kling AI, which is part of Kuaishou, announced its new AI video model, Kling 4.0, on September 28, 2026. According to the platform fal.ai, the full launch is planned for October 2026, but no firm date has been set.

The information here comes from fal.ai and WaveSpeedAI, both of which are platforms that offer, or will offer, access to the model themselves. It is not based on the company's own announcement.

Longer videos and more control

According to fal.ai, Kling 4.0 can generate videos of up to 30 seconds in a single pass. The lighter version, Kling 4.0 Flash, can generate up to 20 seconds.

The model supports 4K resolution and stereo audio, and the 21:9 format, familiar from widescreen film, is a new option. Users can set up to 10 keyframes per generation. These are images or points in the video that you define yourself, so the AI knows how the sequence should look.

The Omni Reference feature can use up to 15 references in total, of which at most 10 can be images and 5 can be videos. It can be used, for example, to maintain a specific look. When editing an existing video, up to 5 input clips can be used.

Some features are not ready yet

10-bit HDR output at 1080p and 4K, as well as video extension of up to 2 minutes, are marked as "coming soon." In other words, they are not available at launch.

On September 28, the Flash version was opened for limited early access. According to the search results, access was reserved for subscribers to the Ultra Yearly plan.

Leaks before the announcement

Before the announcement, there were reports of leaked developer settings, which WaveSpeedAI wrote about on September 24. They mentioned two variants, Preview and Flash, around 10 keyframes and an experimental 120-second mode. WaveSpeedAI itself stressed that these were reports and not documentation from Kuaishou.

What has been announced is therefore 30 seconds, while the 2 minutes remain an upcoming feature.

What does it mean?

For regular users, there is not much to weigh in on yet. Pricing has not been published, and according to fal.ai it will be announced when the model goes live. The sources also do not say how the model performs in independent tests.