Answer: Kling 4.0 renders clips from 3 to 30 seconds in one job, in one-second steps, at 720p or 1080p. A 30-second take costs 180 credits at 720p ($1.80) and 267 at 1080p ($2.67), and it is billed per output second rather than per clip.
Thirty seconds is the number people search for, and it is genuinely unusual: most video models in this price bracket stop at five or ten, which forces every scene into a montage of short shots.
The duration range, priced
| Duration | 720p | 1080p |
|---|---|---|
| 3 s | 18 credits ($0.18) | 27 ($0.27) |
| 5 s | 30 ($0.30) | 45 ($0.45) |
| 10 s | 60 ($0.60) | 89 ($0.89) |
| 15 s | 90 ($0.90) | 134 ($1.34) |
| 20 s | 120 ($1.20) | 178 ($1.78) |
| 30 s | 180 ($1.80) | 267 ($2.67) |
Two facts follow. The price is linear in duration, so there is no bulk discount for going long. And the 3-second floor is real: you cannot ask for a one-second bumper.
What thirty seconds unlocks
A scene, not a beat. A single take can carry an entrance, a change of state and an exit — which is how the published example works: a courier crosses a bridge, a creature descends, they dive, the camera swings round, the shot ends on the horizon.
Camera moves with room to breathe. A dolly that starts wide and ends close needs time; at five seconds it registers as a jolt.
Sound design that arcs. The audio can move from one environment to another inside one render — bridge cables and waterfall, then the clean rush of wind.
Fewer joins. Every cut is a place where continuity can break. One thirty-second take has no joins.
What thirty seconds costs you
- Drift. The model must hold the subject, the camera direction and the light for thirty seconds; failure shows as slow drift rather than a broken frame.
- Review time. Watching thirty seconds critically, three times, is a real cost.
- Re-render price. A wrong thirty-second take is 180 credits, not 30.
That is why the practical workflow is staged: five seconds for blocking, fifteen for the middle, thirty for the take. You pay 300 credits for one clean shot, which is cheaper than two failed long renders.
When a long take is the wrong answer
- The deliverable is a montage. Six five-second shots at 720p cost the same 180 credits and cut faster.
- The scene has dialogue. Long takes with scripted lines need sync you will place in post anyway.
- You are exploring. Nothing about exploration needs thirty seconds of a camera move you have not validated.
- You need 4K. Kling 4.0 tops out at 1080p.
Chaining beyond thirty seconds
Each render is a separate job, so a sixty-second piece is two takes joined in the edit. Use a keyframe pair to make the join land where you want: the last frame of take one as @first_frame of take two, and the move continues instead of restarting.
FAQ
Can I extend a take after the fact? No. Extension is a new render; the edit is where takes are joined.
Is 30 seconds available at 1080p? Yes — the range is 3–30 at both resolutions.
Does a longer clip cost more per second? No. The rate is flat; only the seconds change.
Why does my 1-second request fail? The floor is 3 seconds.
The duration steps and the per-second price are on Callirra's Kling 4.0 page. If you have a thirty-second take that holds without drift, the beat sheet behind it is the useful thing to publish.