Kling vs Veo vs Hailuo: which AI video engine should you use?
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How do Kling, Veo and Hailuo compare?
These four engines animate your scene images into motion. They differ on resolution, scene length and cost.
| Engine | Resolution | Scene length | Cost | Best for |
|---|---|---|---|---|
| Kling 2.6 Pro | 1080p | 5s, 10s | Mid (default) | Sharp, balanced default for most videos |
| Kling 3 Standard | 1080p or 720p | 5s, 10s | Premium | Stronger, more dynamic motion |
| Google Veo 3.1 | 720p or 1080p | 4s, 6s, 8s | Premium | Cinematic movement and camera work |
| Hailuo 2.3 | 768p | 6s, 10s | Lowest | Stretching credits on longer videos |
Resolutions and scene lengths are the engines' native options on TubeTube. Cost is shown as a tier because the exact per-scene credits depend on engine and scene length, the live quote shows the precise number before you launch.
Which AI video engine is the cheapest?
Hailuo 2.3 is the lowest-cost engine, so it's the value pick when you're paying per scene across a long video. At 768p it trades some resolution for a much lower price, which barely matters for fast-moving or stylised content. If a 10-minute video would be expensive on a premium engine, Hailuo is how you keep it affordable. See how that maps to earnings in YouTube revenue by country.
Which engine gives the most cinematic motion?
Kling 3 and Google Veo 3.1 produce the most dynamic, camera-driven motion, which suits hero shots and pieces where movement carries the story. Kling 2.6 Pro is the balanced default: sharp 1080p that looks great across almost any video at a mid cost. Whichever engine animates the scene, keeping the same character across shots is a separate problem, covered in keeping AI characters consistent.
Do you have to choose one engine?
No. TubeTube lets you choose the engine per video rather than locking your whole channel to one. A practical pattern: Hailuo 2.3 for long, low-RPM uploads, Kling 2.6 Pro as the everyday default, and Kling 3 or Veo 3.1 when a specific video needs premium motion. The quote updates with your choice before you launch, so you always see the trade-off. This per-video engine choice is one of the things that sets TubeTube apart in the long-form AI video tool comparison.
How do scene length and resolution affect cost?
You're billed per generated scene, so two levers move the price: the engine (its per-scene rate) and the scene length (a 10s scene costs more than a 5s one). Higher resolution generally costs more too. A short, fast-cut video on Hailuo 2.3 is the cheapest end. A long video with 10s scenes on Veo 3.1 is the most expensive. Most creators land in the middle with Kling 2.6 Pro. Learn the full workflow in how to make faceless YouTube videos with AI.
Methodology
Engine names, resolutions and scene lengths reflect the lineup available on TubeTube as of June 2026 (Kling 2.6 Pro, Kling 3 Standard, Google Veo 3.1, Hailuo 2.3). Cost is presented as a relative tier rather than a fixed number because per-scene credits depend on the engine and the chosen scene length, and the app shows the exact, itemized quote before you launch. Model versions move quickly, so re-check the in-app options before committing.
Frequently asked questions
Which AI video engine is the cheapest?
Hailuo 2.3 is the lowest-cost engine, which makes it the value pick for longer videos where you are paying per scene. Kling 2.6 Pro sits in the middle as the default, and Kling 3 and Google Veo 3.1 are the premium options.
Which engine has the best motion and quality?
For the most dynamic, cinematic motion, Kling 3 and Google Veo 3.1 lead. Kling 2.6 Pro is the balanced 1080p default that looks great for most content. Hailuo 2.3 (768p) trades some resolution for a much lower price.
What resolution and scene length does each engine support?
Kling 2.6 Pro renders 1080p in 5s or 10s scenes. Kling 3 does 1080p or 720p in 5s or 10s. Google Veo 3.1 does 720p or 1080p in 4s, 6s or 8s. Hailuo 2.3 renders 768p in 6s or 10s. Scene length and resolution both affect the per-scene cost.
Do you have to choose one engine for the whole channel?
No. On TubeTube you pick the engine per video, so you can use Hailuo 2.3 to keep a long, low-RPM video cheap and switch to Kling 3 or Veo 3.1 when a piece needs premium motion. The quote updates with your choice before you launch.
Why does the engine change the price so much?
You are billed per generated scene, and each engine has its own per-scene rate. A higher-resolution or premium-motion engine costs more per scene, and longer scene durations cost more than shorter ones, so engine plus scene length together set most of a video's cost.
Which engine should a beginner pick?
Start with Kling 2.6 Pro, the default. It is sharp 1080p at a balanced cost and works for almost any video. Move to Hailuo 2.3 when you need to cut cost on long videos, or to Kling 3 / Veo 3.1 when motion quality matters most.