Mixer AI
Kling 3.0 vs HeyGen Video: specs and price
Kling 3.0 — resolutions: 720p / 1080p / 4K; first frame: Yes.
When to choose Kling 3.0 and when HeyGen Video
Kling 3.0
- Resolutions: 720p / 1080p / 4K vs 768p for HeyGen Video
- Generation modes: from text / from first and last frames / from references vs from text for HeyGen Video
- First frame: Yes vs No for HeyGen Video
- Last frame: Yes vs No for HeyGen Video
HeyGen Video
- Prompt limit: 32,000 characters vs 2,500 characters for Kling 3.0
- Aspect ratios: 6 vs 3 for Kling 3.0
Key differences
Specifications
| Spec | Kling 3.0 | HeyGen Video |
|---|---|---|
| Model variants | Standard / Pro / 4K | HeyGen Video |
| Generation modes | from text / from first and last frames / from references | from text |
| First frame | Yes | No |
| Last frame | Yes | No |
| Input photos | up to 3 elements, 2–4 photos each | up to 1 |
| Shot changes in one clip | Separate scenes: up to 5, each with its own prompt and duration | No separate mode |
| Output audio | Can be enabled or disabled | No |
| Minimum duration | 3 s | 5 s |
| Maximum duration | 15 s | 15 s |
| Resolutions | 720p / 1080p / 4K | 768p |
| Aspect ratios | 9:16 / 16:9 / 1:1 | 9:16 / 16:9 / 1:1 / 4:3 / 3:4 / 21:9 |
| Prompt limit | 2,500 characters | 32,000 characters |
| Price, 1 s (different quality) | — coins · 720p | — coins · 768p |
There is no shared resolution for a direct price comparison, so each price includes its setting and is not highlighted as cheaper.
Price at the same settings
What to compare visually
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.
What to inspect with Kling 3.0
Multiple shots, reference-based characters and optional sound for scenes that need more than an attractive camera move.
- Regular generation starts from text or a first frame with an optional last frame. Duration ranges from 3 to 15 seconds.
- Multi-shot supports up to five scenes with individual prompts and durations. Their durations must add up to the total; a last-frame image is not used in this mode.
- Cuts do not guarantee perfect continuity. Check clothing, hands, product placement and eye lines between shots.
- 4K increases output size; it does not fix misdirected action or anatomical mistakes.
What to inspect with HeyGen Video
Creates videos with sound from a text prompt or a single source image.
- Text: the result is created from a written description.
- Every available setting is shown in the Studio form before launch, and the price follows them.
- The result length is 5 to 15 seconds.
- At most 1 photo as input.
How to run a fair comparison
- Fix the scene, the first frame (if both models accept one), the duration and the resolution.
- Judge motion, not stills: faces, hands and objects should hold across the whole clip and at cuts.
- If sound matters, listen to it separately: dialogue, effects and lip sync differ between models.
- Price a finished clip, not a second: the per-second rate times your real duration, rounded up once.
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
Which is cheaper: Kling 3.0 or HeyGen Video?
The models use different settings, so a direct price comparison would be misleading: the prices of Kling 3.0 and HeyGen Video are in the table, so compare for the mode you need.
How does Kling 3.0 differ from HeyGen Video?
Kling 3.0 — resolutions: 720p / 1080p / 4K; first frame: Yes; last frame: Yes.
How should I compare Kling 3.0 and HeyGen Video fairly?
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.
Are both models available in Mixer AI?
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.
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.