How to Generate Video Clips With Kling 4.0
Kling 4.0 generates 5-10 second video clips from text or a starting image, with credit packs starting around $10 for 66 generations. You describe the shot, it renders, and you can extend or reframe the result.
Text-to-video has gotten good enough to be useful for B-roll and social cuts. It is not good enough to replace a shoot, and knowing the failure modes saves a lot of wasted credits.
What is Kling 4.0?
It is a video generation model from Kuaishou that produces short clips. V4 improved hand articulation and physical plausibility — v3 still melted fingers during fast gestures.
It accepts text prompts, a single reference image, or image-plus-motion control, and outputs up to 1080p depending on tier.
How do you write a prompt that produces usable motion?
Describe camera, subject, action and lighting in that order. Specificity matters more than length.
Weak: “a person walking.” Better: “Medium shot, woman in a beige coat walking toward camera through a rainy Tokyo street at dusk, neon reflections, handheld camera.” The second gives the model a lens choice and a light source.
- Pick text-to-video or image-to-video; image mode holds the subject far more consistently.
- State one primary action. Two simultaneous actions usually produce mush.
- Set duration — 5 seconds is the reliable sweet spot, 10 seconds costs more and risks drift.
- Generate, then use Extend only if the clip is clean.
How much does Kling 4.0 cost?
Credits, not dollars per clip, are how it bills. A standard 5-second generation is roughly 10-20 credits depending on quality mode. The entry pack is around $10 for 66 credits, so a handful of real clips per pack once retries are counted.
Video is expensive compared to image generation. Budget two to three attempts for any shot you actually care about.
Where does it still fail?
Text in frame is unreliable — signage and logos dissolve into gibberish. Complex interactions between two people, like a handshake or a dance, often smear. Long continuous motion past 8 seconds tends to warp the subject’s face.
Fast cuts hide all of this. That is why the tool shines in 3-second social clips and struggles in a continuous dialogue scene.
Who is it for?
Social media editors, indie game trailers and anyone needing filler B-roll without a shoot. It is a poor fit for branded content where a client expects exact product representation, because the model will subtly alter your product’s shape.
Key Takeaways
- Kling 4.0 generates 5-10 second clips; 5 seconds is the most reliable length.
- Prompt order: camera, subject, action, lighting.
- Credits run ~10-20 per 5-second standard clip; entry pack is about $10 for 66 credits.
- Text-in-frame and two-person interactions remain weak points.
Last updated: September 2026.
