HappyHorse vs Kling 3.0 vs SkyReels V4: Which to Pick
HappyHorse vs Kling 3 compared with SkyReels V4: durations, aspect ratios, 4K, filters and real VdoBloom credit costs per second.
HappyHorse 1.1, Kling 3.0 and SkyReels V4 are three different answers to the same question, and the deciding factor is what you start with. HappyHorse 1.1 is text-only and leads on framing, with nine aspect ratios from 21:9 cinema-wide down to 9:21 vertical, at about 9 credits a second at 720p. Kling 3.0 is the only one of the three that starts from either a prompt or a first-frame image and offers a 4K tier, from 5.6 credits a second on its std tier. SkyReels V4 Image-to-Video animates a still you already own, with a 480p draft tier at 22 credits for 5 seconds.
Updated October 2026.
Disclosure: VdoBloom is our platform.
Quick comparison
| Spec | HappyHorse 1.1 Text-to-Video | Kling 3.0 | SkyReels V4 Image-to-Video |
|---|---|---|---|
| Starts from | Text prompt | Text prompt or first-frame image | One still image plus a motion description |
| Duration | 4–15 seconds, one-second steps | 3–15 seconds | 3–15 seconds; price tiers at 5, 10 and 15 |
| Resolution | 720p or 1080p | std, pro, 4K tiers | 480p, 720p or 1080p |
| Aspect ratios | Nine, including 21:9 and 9:21 | 1:1, 9:16, 16:9 — ignored once you upload an image | Follows the source image, no separate control |
| Credit rate | About 9/second at 720p, 11.75 at 1080p | 5.6/second std, 7.2 pro, 26.8 for 4K | 38 credits for 5s at 720p; 70 for 10s; 100 for 15s |
| Content label | MODERATE | STRICT | MODERATE |
| Audio | Not stated on VdoBloom for this variant | None on this variant; use Kling 3.0 Omni for audio | Not exposed in the settings panel — treat as silent |
HappyHorse 1.1: the framing model
HappyHorse 1.1 Text-to-Video is a text-to-video model, and its distinguishing feature is the aspect-ratio menu. Beyond the usual 16:9, 9:16, 1:1, 4:3 and 3:4, it adds 4:5 and 5:4 for feed-optimised posts, plus 21:9 true cinema-ultrawide and its 9:21 vertical mirror — two formats most video generators do not offer at all. That makes it the natural pick when the deliverable is a letterboxed title sequence or a full-bleed vertical banner and you would rather generate the frame than crop into it.
Duration and resolution are more conventional: 4 to 15 seconds in one-second steps, at 720p or 1080p. Pricing runs about 9 credits a second at 720p and roughly 11.75 at 1080p, which is lower per second than the earlier HappyHorse 1.0 model at the same duration ceiling. It carries VdoBloom’s MODERATE content label.
There is no image input. If your project starts from a photograph or a key visual, HappyHorse 1.1 is the wrong shape of tool and either of the other two is a better fit.
Kling 3.0: the flexible one, with the strictest filter
Kling 3.0 is Kuaishou’s flagship on VdoBloom and the only model in this group that generates from either a written prompt or an uploaded first-frame image. Duration runs 3 to 15 seconds, and quality has three tiers: std, pro and 4K. Pricing is per second and scales with tier — std at 5.6 credits a second, pro at 7.2, and 4K at a flat 26.8. A 5-second std clip is about 28 credits; the same five seconds at 4K is about 134.
The 4K tier is the capability the other two do not have at any price. Kling 3.0 is also the only model here with a documented 2,500-character prompt limit, which matters if you write long scene descriptions.
Two constraints are worth knowing before you commit. First, the aspect ratio is 1:1, 9:16 or 16:9 — three options against HappyHorse’s nine — and the ratio is ignored and follows your image anyway once you upload one. Second, Kling’s content filter carries VdoBloom’s STRICT label, the provider rejecting sexual, violent or otherwise policy-violating prompts before generating. That is the tightest filtering of the three. This variant also generates video only, with no audio toggle; Kling’s audio-capable models are the separate Kling 3.0 Omni Text-to-Video and Image-to-Video entries.
SkyReels V4 Image-to-Video: the one that starts from your frame
SkyReels V4 Image-to-Video animates a still — a storyboard panel, a concept painting, a product photo, an archival shot — into a clip between 3 and 15 seconds, with output following the shape of your source image. There is no aspect-ratio control, so prepare the frame at the shape you intend to deliver rather than expecting a re-crop.
Its unusual feature is the three-tier resolution ladder: 480p, 720p and 1080p. The 480p tier is a genuine drafting layer, at roughly a third of the same duration at 720p, which makes it the cheapest way in this group to find out how a model reads your image’s depth and subject before spending more.
One pricing quirk to plan around: the duration buttons offer 3, 5, 8, 10, 12 and 15 seconds, but VdoBloom’s price table only has entries at 5, 10 and 15. A 3-second request bills at the 5-second rate, and 8 or 12 seconds bill at the 10 or 15-second rate. There is no saving in picking 3 over 5. Audio is not exposed on this model’s settings panel, so treat it as a silent-video tool.
What five, ten and fifteen seconds cost
Comparing on duration is the fairest way to read the three credit tables, because the models do not agree on what a resolution tier is called.
| Settings | 5 seconds | 10 seconds | 15 seconds |
|---|---|---|---|
| HappyHorse 1.1, 720p | 45 | 90 | 135 |
| HappyHorse 1.1, 1080p | 58 | 116 | 173 |
| Kling 3.0, std | about 28 | about 56 | about 84 |
| Kling 3.0, pro | about 36 | about 72 | about 108 |
| Kling 3.0, 4K | about 134 | about 268 | about 402 |
| SkyReels V4 Image-to-Video, 480p | 22 | 42 | 60 |
| SkyReels V4 Image-to-Video, 720p | 38 | 70 | 100 |
| SkyReels V4 Image-to-Video, 1080p | 65 | 120 | 175 |
Two facts fall out of the table. Kling 3.0’s std tier has the lowest per-second rate of the three at a comparable output size, and Kling is the only model here with a 4K line at all, at the highest rate in the group. SkyReels V4’s 480p tier is the cheapest way to see any of these models interpret your material. HappyHorse 1.1 sits in the middle on cost and at the top on framing options. None of that is a statement about output quality, which VdoBloom does not rank.
The exact cost for your chosen duration, resolution and tier is shown before you generate on all three, and a failed job is refunded automatically.
Which to pick, by the constraint that binds
- You have one still image and want it to move: SkyReels V4 Image-to-Video. Start at 480p and a short duration to check the motion reads correctly.
- You need a first-frame image plus the option to switch to text on the next generation: Kling 3.0, which handles both from the same page.
- You need 4K: Kling 3.0 at its 4K tier. Neither of the others goes there.
- You need 21:9, 9:21, 4:5 or 5:4 natively: HappyHorse 1.1, the only one of the three with those ratios.
- Your prompt keeps getting declined: HappyHorse 1.1 or SkyReels V4, both MODERATE. Kling’s STRICT filtering is the most likely to refuse borderline creative work.
- You want the lowest per-second rate at a comparable output size: Kling 3.0’s std tier.
Drafting cheaply across all three
Every model here is priced by duration, so a first test should be short. SkyReels V4 at 5 seconds and 480p is 22 credits, Kling 3.0 at 3 seconds on std is about 17, and HappyHorse 1.1 at 4 seconds and 720p is 36. That is about 75 credits to see how three different models treat the same idea.
A second habit saves more than any setting: describe one clear action per prompt. All three models have to interpret your wording, and SkyReels and the image-start path of Kling have to reconcile it with an uploaded frame as well. A paragraph of stacked instructions is the most common cause of motion that ignores the prompt. Our walkthrough of Kling 3.0 settings covers the controls in more depth, and if you are deciding on output size rather than model, the guide to 1K, 2K and 4K video explains what each tier is actually for.
New accounts start with 10 free credits, which covers none of these models’ cheapest render outright but is enough to open the tools and read the live credit preview before you top up. Full rates are on the pricing page.
Frequently asked questions
Which of the three is cheapest?
By per-second rate at a comparable output size, Kling 3.0’s std tier is the lowest of the three at 5.6 credits a second. By total credits for a short first test, Kling 3.0 at 3 seconds on std is about 17 credits and SkyReels V4 at 5 seconds and 480p is 22. HappyHorse 1.1 is the highest of the three at a matched 720p duration, at about 9 credits a second.
Can any of these start from an image?
Kling 3.0 and SkyReels V4 Image-to-Video both can. Kling takes a first-frame image and will also generate from a text prompt on the same page, and it ignores its aspect-ratio setting once an image is uploaded. SkyReels V4 Image-to-Video takes one still plus a motion description and always inherits the source image’s shape. HappyHorse 1.1 Text-to-Video has no image input at all.
Which has the widest choice of aspect ratios?
HappyHorse 1.1, by a distance: nine ratios including 21:9 cinema-ultrawide and 9:21 vertical, plus 4:5 and 5:4 for feed posts. Kling 3.0 offers three (1:1, 9:16 and 16:9). SkyReels V4 Image-to-Video offers no ratio control, because the output follows your uploaded image.
Does Kling 3.0 generate audio?
Not on this variant — it generates video only and exposes no audio toggle. If you want native audio from the Kling family on VdoBloom, the Kling 3.0 Omni Text-to-Video and Image-to-Video models are the ones to use. SkyReels V4’s underlying model supports synchronized audio but VdoBloom’s settings panel does not expose an audio toggle for it, so treat that one as silent as well.
Why is my prompt rejected on one model but fine on another?
Because the three sit on different content-filter tiers. Kling carries VdoBloom’s STRICT label, which means the provider rejects sexual, violent or otherwise policy-violating prompts and uploads before generating. HappyHorse 1.1 and SkyReels V4 both carry MODERATE, the standard tier, so routine creative and commercial prompts pass more often. If a concept keeps being declined on Kling, re-running the same idea on one of the other two is a reasonable test — and a rejected prompt is not billed.
All three run from the same VdoBloom workspace on one credit balance: HappyHorse 1.1 Text-to-Video for the widest framing options, Kling 3.0 for text-or-image input and a 4K tier, and SkyReels V4 Image-to-Video for animating a still you already own. New accounts start with 10 free credits and no card, and every generation shows its exact credit cost before you confirm.
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