Kling 4.0
Kuaishou's Kling 4.0 moves the model from short clips to half-minute scenes: Kling's own guides describe native 30-second videos, 4K 10-bit HDR output and multiple keyframes to steer a shot from start to end. Here is what Kling has published, what 4.0 Flash is, and what you can run in LazyKiwi right now. Specs: up to 4K, 10-bit HDR.
Using it
How to use Kling 4.0
Kling 4.0 is a Kling product; LazyKiwi does not run it yet.
Kling app
Sign in to Kling, pick 4.0 (or 4.0 Flash where offered), set the length up to 30 seconds, add your keyframes in order and generate. Credits and tiers are on Kling's pricing page.
Kling API
Kling's developer platform lists its video models with per-generation pricing; check the release notes for 4.0 availability on the API.
Need a Kling clip now?
LazyKiwi's video generator runs Kling v3 Omni in the browser with free credits on sign-up, next to Veo 3, Wan 2.7 and Seedance 2.5.
What it is
What Kling 4.0 is built for
Kling published "Introducing Kling 4.0: Visual Realism, Creative Control, and Next-Level Storytelling" on September 30, 2026, alongside a keyframes guide titled "How to Control a 30-Second AI Video" and a 4.0 vs 3.0 comparison. The Chinese Kling site sums the release up as stable large-scale motion and an immersive audio-visual experience, moving from frame generation to professional-grade finished scenes.
Length
Native 30-second videos
The headline change: a single generation can run 30 seconds, where 3.0 worked in short clips you had to extend. Kling frames this as going from shots to scenes with one prompt and one set of keyframes.
- 30-second native generation
- Scenes, not just shots
- Built for storytelling and ads
Quality
4K with 10-bit HDR
Kling's own page title for 4.0 is "Create Cinematic 30s Videos with 4K 10-bit HDR". 10-bit colour gives a grade more room than the 8-bit output most models return.
- 4K output
- 10-bit HDR colour
- Stable, large-amplitude motion
Control
Multiple keyframes across one clip
Kling's keyframes guide shows several stills placed along the 30-second timeline so the model hits each one in order, which is how you keep a character and a camera path consistent over a long take.
- Several keyframes per generation
- Character and scene consistency
- Audio-visual generation in one pass
Flash
Kling 4.0 Flash
Kling previewed a lighter Flash variant ahead of the full model: a faster, cheaper tier for iteration, with the full 4.0 following in October 2026. Check Kling's release notes for which tier your plan includes today.
- Faster, cheaper tier
- Released ahead of the full model
- Full 4.0 rolling out in October 2026
Specs
Kling 4.0 specs at a glance
From Kling's blog titles and guides published September 30, 2026 and its product pages, checked October 15, 2026. Kling has not published a full spec sheet; items marked "per Kling" come from its announcement wording.
- Developer
- Kuaishou (Kling AI)
- Announced
- September 30, 2026
- Duration
- Native 30-second videos
- Resolution
- 4K, 10-bit HDR
- Control
- Multiple keyframes along one clip
- Audio
- Audio-visual generation
- Variants
- Kling 4.0; Kling 4.0 Flash
- Where to use
- Kling web app and mobile app; Kling API platform
- In LazyKiwi
- Not yet; Kling v3 Omni is available in the video generator
Versions
Kling 4.0 vs Kling 3.0 vs Kling v3 Omni
What changed, per Kling's September 30, 2026 posts; v3 Omni is the Kling generation you can run in LazyKiwi today.
| Model | Length | What it is for | Where |
|---|---|---|---|
| Kling 4.0 | Up to 30 s native | Long scenes with keyframes, 4K 10-bit HDR, audio-visual output | Kling app and API |
| Kling 4.0 Flash | Short clips | Fast, cheaper iteration before the full model | Kling app |
| Kling 3.0 | Short clips, extendable | Previous generation; 4.0 vs 3.0 is Kling's own comparison | Kling app and API |
| Kling v3 Omni | Short clips | Text and image to video with reference inputs, in the browser | LazyKiwi video generator |
FAQ
Kling 4.0 FAQ
What is Kling 4.0?
Kling 4.0 is Kuaishou's video generation model announced on September 30, 2026. Kling describes it as native 30-second video at 4K with 10-bit HDR, with multiple keyframes to control a whole scene.
What is the Kling 4.0 release date?
Kling announced it on September 30, 2026. Kling 4.0 Flash was released first, with the full model rolling out in October 2026.
How long can a Kling 4.0 video be?
Kling's guide title is "How to Control a 30-Second AI Video": a single generation can be 30 seconds, which is the main change from 3.0's shorter clips.
Does Kling 4.0 make 4K video?
Kling's own page for 4.0 promises cinematic 30-second videos with 4K 10-bit HDR. Check your plan on Kling for which resolutions are included.
What is Kling 4.0 Flash?
A faster, lighter tier of 4.0 that Kling made available before the full model. It is meant for quick iteration; the full 4.0 is the one with the long-form and 4K claims.
What are multiple keyframes in Kling 4.0?
You place several stills along the timeline and the model generates a clip that passes through each one in order, so a character, product or camera path stays consistent over 30 seconds.
Kling 4.0 vs 3.0: what changed?
Per Kling's comparison post: longer native clips (30 seconds), 4K 10-bit HDR, more stable large motion and keyframe control. 3.0 remains available on the platform.
Is Kling 4.0 free?
Kling sells generations by credits with free daily credits on its basic tier; whether 4.0 is included in free credits depends on Kling's current plan rules, so check its pricing page.
Can I use Kling 4.0 in LazyKiwi?
Not yet. LazyKiwi runs Kling v3 Omni today; this page will be updated when 4.0 is added. Veo 3, Wan 2.7 and Seedance 2.5 are also available.
Is Kling 4 the same as Kling 4.0?
Yes. Kling 4, Kling 4.0, Kling AI 4.0 and Kling 4.0 Flash all refer to the same September 2026 generation; Flash is its lighter tier.
Run Kling in the browser today
Kling 4.0 is not in LazyKiwi yet. Kling v3 Omni is, with free credits on sign-up and the same workbench for Veo 3, Wan 2.7 and Seedance 2.5.
More models
Video models you can run in LazyKiwi today.