What Is Kling 4.0? Features, Specs and Access

Kling 4.0 is Kuaishou's new AI video model, officially launched on October 15, 2026, according to Kuaishou, and its headline feature is length: up to 30 seconds generated in a single pass. On VerseIn, it turns a text prompt or a reference image into a silent 3- to 30-second clip at 720p or 1080p. Everything here comes from Kling's and Kuaishou's pages and VerseIn's model page; we have not generated clips with Kling 4.0, so nothing below judges output quality.

Key Takeaways

• Kling says Kling 4.0 generates 3- to 30-second videos "in a single pass," up from the 3 to 15 seconds it lists for Kling 3.0.
• On VerseIn, Kling 4.0 runs text to video and reference to video, with lengths of 3 to 30 seconds, 720p or 1080p quality, and 16:9, 9:16, 1:1 or 21:9 frames.
• VerseIn's page lists Kling 4.0 output as silent; Kling documents stereo audio for its own app.
• Up to 10 keyframes, 15-asset Omni Reference, video editing and extension to 2 minutes are features Kling documents for its own app. VerseIn's Kling 4.0 page does not list them.

Kling 4.0 specs on VerseIn

These are the options VerseIn's Kling 4.0 model page showed on October 27, 2026. The page sums the model up as "Stable motion through complex camera moves, with 30-second takes in one pass at up to 1080p."

The page does not list an image-to-video or first-frame mode, and it does not give a maximum number of reference images. Kling's own blog states its prompt limit as up to 8,000 tokens, which is a different unit; on VerseIn, the prompt box currently allows up to 8,000 characters.

Neither of the other Kling pages on VerseIn lists 21:9: Kling 3 offers 16:9 and 9:16, and Kling 3.0 Turbo adds 1:1. For prompt-first work across VerseIn's video models, see the Text to Video page.

What Kling 4.0 is

Kling 4.0 is the next generation of Kuaishou's Kling video models, following Kling 3.0. On its Kling 4.0 feature page, Kling says the model brings "more stable dynamic motion, realistic physical interactions, and stronger cinematic camera control." A Kling launch post describes it as a model that "brings video generation, multimodal references, and editing into a unified creative model."

The rollout came in two stages. Kling's Kling 4.0 vs 3.0 post, dated September 30, 2026, says a Kling 4.0 Flash version opened in early access for "a limited group of users" from September 28. A press release issued by Kuaishou Technology then said Kling 4.0 "officially launched on October 15." We did not find a separate spec sheet for the Flash version on Kling's pages.

Features Kling documents for Kling 4.0

The features below come from Kling's own pages and describe Kling's app. Apart from the 3 to 30 second length in the table above, VerseIn's Kling 4.0 page does not show them, so read them as background on the model, not settings you can pick on VerseIn.

Up to 10 keyframes

Kling says you can place up to 10 keyframe images on a timeline to guide how a clip develops. Kling's comparison post says Kling 3.0 supported start and end frames only.

Omni Reference

Kling's Omni Reference accepts up to 15 combined reference assets, "subject to individual input limits." Kling lists those limits as up to 10 images, up to 5 reference videos (30 seconds combined) and up to 7 subject elements, plus voice references.

Editing and Creative Recreation

Kling's FAQ lists Creative Recreation and targeted video editing alongside text, image and reference generation. Kling says editing can change characters, products, backgrounds, camera angles or visual style, with up to 5 input clips (one primary) and 30 seconds of footage combined.

Video extension up to 2 minutes

Kling describes forward and backward extension across multiple passes, up to 2 minutes in total.

Audio and languages

Kling says Kling 4.0 produces two-channel stereo audio, up from single-channel audio in Kling 3.0, with improved lip sync and support for voice references. Its comparison post adds Portuguese, German, French and Hindi "and more" to the Chinese, English, Japanese, Korean and Spanish it lists for 3.0, along with multilingual on-screen text, logos and emojis.

4K and 10-bit HDR: announced as coming soon

Kling's feature page says "native 4K and 1080p output coming soon," featuring 10-bit HDR. Other parts of Kling's pages describe 4K differently, so this article treats 4K and HDR as announced, not shipped. On VerseIn, Kling 4.0 outputs up to 1080p.

What changed from Kling 3

Kling's comparison post sums up the update as "longer generation, finer timeline control, richer multimodal input, and more flexible editing."

Kling also says Kling 4.0 adds a 21:9 aspect ratio.

On VerseIn the two models differ in other ways too. VerseIn's Kling 3 page (Kling 3.0 in Kling's naming) lists text to video, image to video and first and last frame modes, clips of 3 to 15 seconds, 16:9 and 9:16 frames, a 5,000-character prompt limit, and audio generated with the video. Kling 4.0 on VerseIn offers longer clips, more frame shapes and a longer prompt, but VerseIn lists its output as silent and does not list a first and last frame mode.

If you need sound from the same generation or want to fix the opening and closing frames, the Kling 3 page lists both. If you need a single take longer than 15 seconds, or a 21:9 frame, Kling 4.0 is the Kling option on VerseIn that lists them.

How to use Kling 4.0 on VerseIn

VerseIn's model page lists three steps.

1. Open the studio. From the Kling 4.0 page, click through to the studio. The model arrives preselected, so the form only offers what Kling 4.0 supports.
2. Write a prompt or add a reference image. Type a scene description (the box takes up to 8,000 characters), attach a reference image or pull in a saved character, or combine them. Set any length from 3 to 30 seconds, then choose 720p or 1080p and a frame shape.
3. Generate. Kling 4.0 works in the background; the finished clip appears in your library, ready to upscale or reframe with tools like the AI Video Upscaler.

Since Kling's pitch centers on camera control and motion, it can help to spell out the camera move (a slow push-in, an orbit, a tracking shot) and what the subject does at each stage of a long take.

Because the clip comes out silent, sound is a second step. VerseIn's page notes you can add voice-over or music afterward, using tools such as AI Voice Over and the AI Music Generator. If you need sound generated with the picture, see AI video generators with audio.

Every Kling 4.0 run spends credits, and the amount changes with the model and the settings you choose. VerseIn's pricing page says "You'll always see the total cost before you confirm," and a run that fails has its credits returned automatically.

Where Kling 4.0 fits

VerseIn's page suggests Kling 4.0 for product videos, UGC ads, marketing videos, social media videos and anime videos. With up to 30 seconds per generation, a product walk-around or a full ad script can fit in one clip instead of several joined ones.

For step-by-step workflows, see how to make a product video from one photo and how to make UGC video ads with AI. VerseIn's other video models start from the AI Video Generator page.

FAQ

Is Kling 4.0 out yet?

Yes. Kuaishou's press release says Kling 4.0 officially launched on October 15, 2026, after Kling 4.0 Flash opened in early access to "a limited group of users" on September 28, according to Kling. It is available on VerseIn as a text-to-video and reference-to-video model.

How long can Kling 4.0 videos be?

On VerseIn, you can set any length from 3 to 30 seconds in 1-second steps. Kling says its own app can extend clips across multiple passes to as long as 2 minutes, but VerseIn's Kling 4.0 page does not list that extension.

Does Kling 4.0 generate sound on VerseIn?

No. VerseIn's page lists Kling 4.0 output as silent video. Kling documents stereo audio and lip sync in its own app, but on VerseIn you add voice-over or music after generating.

Does Kling 4.0 support 4K?

Not on VerseIn. Kling describes native 4K and 10-bit HDR output as coming soon. On VerseIn, Kling 4.0 offers 720p and 1080p.