Kling 4.0 from Kuaishou
Kuaishou's next flagship video model. 30 second clips in 4K with up to 10 keyframes, 15 references, and stereo audio. Launching October 2026.
What you can make with Kling 4.0
Twice the clip length of Kling 3.0
Kling 3.0 stopped at 15 seconds. Kling 4.0 generates 3 to 30 seconds in a single run, enough for a scene with a setup, a turn, and a payoff without stitching takes together.
10 keyframes instead of 2
Kling 3.0 anchored a clip at its first and last frame. Kling 4.0 accepts up to 10 keyframe images along the timeline, so you set every beat and the model animates the motion between them.
15 references in one generation
Omni Reference shares a budget of 15 items: up to 10 images, up to 5 video clips totaling 30 seconds, saved elements, and voice. Up to 7 subjects keep their identity across the scene.
Edit existing footage
Bring up to 5 clips, 30 seconds combined, and describe the change. Kling 4.0 swaps a character, replaces the background, or adjusts an expression while the rest of the shot stays as filmed.
Stereo sound and closer lip sync
Audio now renders in two channel stereo with more accurate lip sync than Kling 3.0. Dialogue covers English, Chinese, Japanese, Korean, Spanish, Portuguese, German, and more, with regional accents.
Inside Kling 4.0
4K resolution output
Render crisp, production-ready footage at up to 4K.
Flexible aspect ratios
Compose in 3 aspect ratios, from square to widescreen and vertical.
Clips up to 15 seconds
Generate variable-length shots without stitching multiple runs.
Frame control
Steer motion with start and end frames for precise, repeatable results.
Native synced audio
Generate video with synchronized sound baked in — no separate scoring or dubbing pass.
Production-ready output
Kling 4.0 renders clean, high-fidelity footage built for real campaigns, products, and client work.
Create with Kling 4.0
- 1
Select Kling 4.0
Choose Kling 4.0 from the model library to start generating cinematic videos.
- 2
Enter prompt and add references
- 3
Generate and download
Frequently asked questions
What is Kling 4.0?
Kling 4.0 is an AI video generation model available on Morphix. Kuaishou's next flagship video model. 30 second clips in 4K with up to 10 keyframes, 15 references, and stereo audio. Launching October 2026.
When does Kling 4.0 launch?
Kuaishou published the Kling 4.0 spec sheet on September 28, 2026 and set the full launch for October 2026 without naming a day. It arrives on Morphix once Kuaishou opens access. Until then Kling 3.0 runs in the video studio.
How is Kling 4.0 different from Kling 3.0?
Maximum clip length doubles from 15 to 30 seconds. Frame control grows from a start and end frame to up to 10 keyframes. References expand to 15 items across images, video, saved elements, and voice. Audio moves to two channel stereo, prompts stretch to 8,000 tokens, and 21:9 joins 16:9, 1:1, and 9:16.
What is Kling 4.0 Flash?
Flash is the lighter variant built for speed and value. It generates 3 to 20 second clips at 720p in standard dynamic range, while the full Kling 4.0 reaches 30 seconds and 4K. Flash opened in early access on September 28, 2026 for Ultra yearly subscribers on Kling's own platform.
Does Kling 4.0 support HDR and video extension?
Both are announced but marked as coming soon. Kuaishou lists 10 bit HDR output at 1080p and 4K, and a video extension feature that lengthens clips up to 2 minutes.
How do I use Kling 4.0 on Morphix?
Open the video studio on Morphix, select Kling 4.0, write a prompt or upload a reference frame, and generate. Every model shares one subscription and credit pool, so there are no API keys or separate sign-ups.
What resolution and duration does Kling 4.0 support?
On Morphix, Kling 4.0 supports 720p, 1080p, and 4k output at durations from 3 to 15 seconds per generation.
Does Kling 4.0 support reference-guided generation?
Yes. Kling 4.0 supports reference-guided workflows on Morphix, so you can use images to steer composition, subject identity, and style.
Can I use Kling 4.0 videos commercially?
Yes. On Morphix paid plans, videos you generate with Kling 4.0 include commercial licensing for campaigns, products, and client deliverables.
Who should use Kling 4.0?
Kling 4.0 is useful for designers, marketers, creative teams, and independent creators who need polished AI-generated videos for concepts, campaigns, client work, and production work.
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