Kling 4.0 — maximum duration: 30 s; input photos: up to 8.
Updated
| Spec | Kling 4.0 | Kling 2.1 |
|---|---|---|
| Model variants | Reference / Keyframes | Standard / Pro / Master |
| Generation modes | from text / from first and last frames / from references | from text / from first and last frames |
| First frame | Yes | Yes |
| Last frame | Yes | Yes |
| Input photos | up to 8 | No |
| Input videos | up to 5 | No |
| Input audio files | up to 3 | No |
| Input video length | 2–30 s | No |
| Minimum duration | 3 s | 5 s |
| Maximum duration | 30 s | 10 s |
| Resolutions | 720p / 1080p | No separate selector |
| Aspect ratios | 9:16 / 16:9 / 1:1 / auto / 21:9 | 9:16 / 16:9 / 1:1 |
| Prompt limit | 8,000 characters | 5,000 characters |
| Price (different settings) | 101 coins · 5 s · 720p | 112 coins · 5 s · No separate selector |
There is no shared resolution for a direct price comparison, so each price includes its setting and is not highlighted as cheaper.
For a fair A/B test, use the same scene and, where both modes allow it, the same first frame. Inspect motion continuity, character and object consistency, physics and contacts, camera behavior, temporal deformation, in-clip cuts and audio synchronization.
A clip of up to 30 seconds from text and references or from a chain of keyframes: named characters, voice samples and exact frames.
Turn a photo into a short moving shot, or start from text with Master.
Prices, availability and specifications come from the Mixer AI catalog. This is not an independent test: try both models on the same task before choosing.
Kling 4.0: 101 coins · 5 s · 720p. Kling 2.1: 112 coins · 5 s · No separate selector. The models use different settings, so a direct price comparison would be misleading: compare for the mode you need.
Kling 4.0 — maximum duration: 30 s; input photos: up to 8; input videos: up to 5.
Fix the scene, first frame, duration and resolution. Watch the motion across the whole clip and listen to the sound separately. Price the finished clip, not one second.
Yes. Both models are in the Mixer AI video catalog; the launch button on the page opens Canvas on a computer and the Studio on a phone. The page exists only for models in the current catalog.
There is no single winner. First rule out the model that lacks the duration, first or last frame, sound or resolution you need, then compare clips on your own scene. The table highlights only measurable differences.
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