Mixer AI
Kling 4.0 Flash vs Kling 3.0 Motion Control: specs and price
Both models are available in the current Mixer AI catalog, but they solve different jobs within the same media type. This page therefore does not label one as universally better: the table shows compatible inputs, limits and pricing, while the visual section separates valid A/B checks from different workflow stages.
Key differences
Specifications
| Spec | Kling 4.0 Flash | Kling 3.0 Motion Control |
|---|---|---|
| Generation modes | from text / from first frame / from references | Motion Control |
| First frame | Yes | No |
| Input photos | up to 7 | 1, required |
| Input videos | up to 5 | 1, required |
| Input video length | No | 3–30 s |
| Minimum duration | 3 s | 3 s |
| Maximum duration | 20 s | 30 s |
| Resolutions | 720p | 720p / 1080p |
| Aspect ratios | 9:16 / 16:9 / 1:1 / auto / 21:9 | Follows the input |
| Prompt limit | 8,000 characters | 2,500 characters |
| Price, 1 s · 720p | — coins | — coins |
What to compare visually
Do not force tools with different jobs into the same test. First compare the inputs each one accepts and the output it is meant to produce. If they share a workflow, run an A/B test on the same source; otherwise judge each at its own stage: generation, Motion Control, avatar creation or upscaling.
What to inspect with Kling 4.0 Flash
A lighter Kling 4.0: clips of 3–20 seconds in 720p from text and references, or from a start frame.
- Text and references: a prompt up to 8000 characters, up to 7 photos and up to 5 videos totaling up to 20 seconds; the Video sound switch keeps the sound of reference videos.
- Start frame: one optional photo; without it choose 16:9, 9:16, 1:1 or 21:9, with it the format follows the photo.
- Flash gives 720p and up to 20 seconds only; choose Kling 4.0 for 1080p and 30 seconds.
- Start frame mode accepts no video: videos belong to references mode only.
What to inspect with Kling 3.0 Motion Control
Transfer a recorded performance to your character and choose which source supplies the background.
- One character image and one motion video; 720p or 1080p.
- Video orientation supports up to 30 seconds; image orientation up to 10. The background can come from either source.
- A motion video is required; a dance description alone is not enough.
- Clothes and faces can change during occlusions. Inspect intermediate frames, not just the opening.
How to run a fair comparison
- Identify the workflow stage first: create new media, transfer motion, make a talking avatar, or improve an existing file.
- Compare specifications only where they mean the same thing: accepted inputs, limits, available resolution and the real price of the needed mode.
- If a shared workflow exists, use the same source. If it does not, do not infer visual quality from non-equivalent outputs.
- Tools for different stages can be used sequentially rather than as substitutes.
Sources
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.
What we compare
FAQ
How should I compare Kling 4.0 Flash and Kling 3.0 Motion Control fairly?
Compare purpose and inputs first. Test any shared workflow on the same source; evaluate different workflows separately by output quality, constraints and the price of that stage.
Are both models available in Mixer AI?
Yes. Both tools are in the current Mixer AI catalog. They are often used one after the other: for example, one model makes the video and another improves the file.
Which model is better?
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.