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When did Kling 4.0 come out?
Kling AI announced full availability on October 15, 2026. The lighter Kling 4.0 Flash had been in limited early access since September 28.
Kling 4.0 Free:30 Seconds, 10 Keyframes
Kling 4.0 generates up to 30 seconds with stereo audio and lip-sync in one pass, and accepts up to 10 keyframes and up to 15 references. Try Kling 4.0 online for free!
Specifications
What Kling 4.0 does
Kling’s own published specs for the full model. Items Kling marks as coming soon are labelled that way.
| Release | Kling 4.0 Flash opened to a limited group on September 28, 2026. The full Kling 4.0 became available on October 15, 2026. |
|---|---|
| Modes | Text to video, image to video, first and last frames, multi-keyframes, Omni Reference and video editing. |
| Clip length | 3 to 30 seconds in a single generation. |
| Keyframes | Up to 10 keyframe images to pin character states, scene changes and story beats. |
| References | Up to 15 assets per generation: up to 10 images, up to 5 videos (30 seconds combined), and up to 7 subjects, which can carry a voice reference. |
| Resolution | 720p, 1080p and 4K. 10-bit HDR at 1080p and 4K is marked coming soon. |
| Aspect ratios | 21:9, 16:9, 1:1, 9:16 and auto. |
| Audio | Two-channel stereo with lip-sync; dialogue in Chinese, English, Japanese, Korean, Spanish, Portuguese, German, French and more, including regional accents. |
| Prompt length | Up to 8,000 tokens. |
| Video extension | Repeated extension up to 2 minutes — marked coming soon. |
Official Kling sources
The background clip on this page is Kling 3.0 showcase footage, not a Kling 4.0 sample.
Last updated:
Straight answers
Before you spend a credit
Release date, plan and cost, Flash versus full, and what Kling still marks as coming soon.
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Is Kling 4.0 free here?
No. Kling 4.0 is a paid-plan model and each generation is metered in credits; the composer shows the quote before you submit. The free plan covers Seedance 2.0 Mini.
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Kling 4.0 or Kling 4.0 Flash?
Flash is the fast, cheaper tier: 3–20 seconds, 720p, 8-bit SDR, with text, image and Omni Reference input. The full model adds 30 seconds, keyframes, 1080p and 4K.
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What is not live yet?
Kling lists 10-bit HDR at 1080p and 4K and video extension up to 2 minutes as coming soon.
Workflow
From prompt to Kling 4.0 clip
Same four steps for text, for keyframes, and for reference-led generation.
- 01
Select Kling 4.0
Open the composer on this page, or the full generator, and pick Kling 4.0 from the model menu under the Kling filter.
- 02
Write the story beats
Lead with what moves and when: the subject, the action, the camera, and the moment each beat lands. Prompts run to 8,000 tokens.
- 03
Add keyframes or references
Up to 10 keyframes to pin the beats, or references: up to 10 images, 5 videos (30 seconds combined) and 7 subjects.
- 04
Set length, then submit
Choose anything from 3 to 30 seconds, pick the aspect ratio, check the credit quote, and submit.
Comparison
Kling 4.0 vs Seedance 2.5
Both reach 30 seconds in one pass and both take mixed references. Keyframe count, reference mix and resolution are the real dividers.
| Feature | Kling 4.0 | Seedance 2.5 |
|---|---|---|
| Clip length | 3 to 30 seconds | Up to 30 seconds in a single generation |
| Frame control | First and last frames, plus up to 10 keyframes | First frame, or first and last frames |
| References | Up to 15: 10 images, 5 videos, 7 subjects | Up to 30 reference images and 10 reference videos |
| Resolution | 720p, 1080p and 4K (10-bit HDR coming soon) | 480p, 720p and 1080p |
| Aspect ratios | 21:9, 16:9, 1:1, 9:16 and auto | 16:9, 9:16, 1:1, 4:3, 3:4, 21:9 and adaptive |
| Editing the result | Edit an existing clip; extension to 2 minutes coming soon | Localized edit and extend on an existing video |
Vendor reference: Kling AI official site
Where it fits
What Kling 4.0 is built for
Long single takes, story beats pinned by keyframes, and remaking a proven ad with your own product.
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Single 30-second takes
A long one-shot — a walk-through, a chase, a product reveal — without stitching two clips together.
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Story beats you control
Up to 10 keyframes fix where a character stands and what the scene looks like at each beat.
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Remaking a proven ad
Use a reference video for pacing and camera moves, then swap in your own product, character or setting.
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Multilingual dialogue
Stereo audio with lip-sync and on-screen text that stays legible as the camera moves.
Also on this platform
If Kling 4.0 is not the right fit
Same account, same credits, same asset library.
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Motion transfer and shorter clips
Kling 3.0, Kling O3 and the Motion Control variants cover 4 to 15 second clips and moving a character with a reference video.
Use Kling 3.0 online02
More references per shot
Seedance 2.5 also runs to 30 seconds, takes up to 30 reference images and 10 videos, and can edit a region of a finished video or extend it.
See Seedance 2.5 for 30-second video03
Testing on the free plan
Kling models need a paid plan. Seedance 2.0 Mini is included on the free plan for cheap iteration.
Try Seedance 2.0 Mini free onlineFAQ
Kling 4.0 questions
Release, upgrades over Kling 3.0, Flash, the Kling models here, and how this platform relates to Kuaishou.
Kling 4.0 is the video generation model Kuaishou’s Kling AI released on October 15, 2026. It generates 3 to 30 seconds per pass, takes up to 10 keyframes and up to 15 reference assets, and outputs two-channel stereo audio.
Clip length doubles from 15 to 30 seconds, multi-keyframe control (up to 10) is new, Omni Reference takes up to 15 assets, prompts run to 8,000 tokens, and audio moves to stereo with lip-sync.
The fast tier of the 4.0 lineup, opened to a limited group on September 28, 2026. It makes 3–20 second clips at 720p in 8-bit SDR and supports text, image and Omni Reference input.
Kling 4.0, Kling 3.0, Kling O3, Kling 3.0 Motion Control and Kling 2.6 Motion Control, all under the Kling filter in the model menu.
No. SeedVideo AI is an independent platform that runs Kling models through an upstream API. It is not operated by, endorsed by or affiliated with Kuaishou or Kling AI.
Kling 4.0 on SeedVideo AI
Generate your first Kling 4.0 shot
Prompt, keyframes, references, length, submit. Every generation lands in the same asset library as your Seedance work.
Open the generator