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Which AI Video Model Should I Use?

Veo, Sora, Kling, Seedance, OmniHuman... nine models, nine price points. Answer four questions and get the right one for your ad, with the real per-clip cost.

1. What kind of ad are you making?

2. How long does the clip need to be?

3. What is your budget per clip?

4. Does the video need to speak your exact script?

Answer all four questions to get your model recommendation with the real credit cost.

Full credit cost reference

Live per-clip costs from the UGC Vids AI credit catalog. Dollar figures assume the Starter plan ($49 for 5,000 credits).

ModelClipCredits≈ Cost
Grok Video5s · 720p70$0.69
Seedance 1.5 Pro5s · 1080p100$0.98
Pruna Avatar15s · 1080p120$1.18
Grok Video10s · 720p140$1.37
Pruna Avatar20s · 1080p180$1.76
Seedance 1.5 Pro12s · 1080p245$2.40
Veo 3.18s · 1080p245$2.40
Sora 212s · 1080p245$2.40
Kling 2.610s · 1080p260$2.55
Kling 3.05s · 1080p260$2.55
Happy Horse 1.115s · 720p420$4.12
Seedance 2.015s · 720p425$4.17
OmniHuman 1.515s · 1080p490$4.80
Kling 3.010s · 1080p520$5.10
Happy Horse 1.115s · 1080p550$5.39
Seedance 2.015s · 1080p950$9.31
OmniHuman 1.530s · 1080p980$9.60
Sora 2 Pro12s · 1080p1,225$12.00

How the recommendation works

The picker routes on three real constraints, not vibes. First, capability: only lip-sync models (OmniHuman 1.5, Pruna Avatar, Happy Horse 1.1) can speak an exact script, and only scene models with native audio (Veo 3.1, Sora 2, Kling, Seedance) can score a b-roll clip. Second, duration caps: every model has a hard maximum per clip (Veo 3.1 stops at 8 seconds, Sora 2 at 12, Seedance 2.0 at 15, OmniHuman 1.5 at 30), so your length answer eliminates models outright. Third, cost: within whatever survives, the budget answer picks between the cheapest, the best value, or the highest-quality option.

Every credit number on this page comes straight from the live UGC Vids AI credit catalog, the same table the generator charges against. Nothing is estimated or rounded for effect. Dollar figures are computed at the Starter plan rate of $49 for 5,000 credits; on Growth and Agency plans the per-credit price is lower, so real costs only go down from what you see here. If you would rather read the full table than answer questions, every model has its own page: AI video model specs and credit costs.

The quality tiers (budget, balanced, premium) reflect how we see teams actually use these models in production: cheap models for volume hook testing, mid-tier for everyday ads, and the flagship models reserved for creatives that already proved out. When two models tie, we recommend the cheaper one and list the other as the runner-up.

Frequently asked questions

Which AI video model is best for ads?

There is no single best model, it depends on the job. For talking-head UGC ads, OmniHuman 1.5 (exact scripts, up to 30s) or Happy Horse 1.1 (most natural delivery). For product scenes, Veo 3.1 and Sora 2 are the balanced defaults with native audio, Kling 3.0 and Seedance 2.0 are the premium cinematic picks, and Grok Video or Seedance 1.5 Pro are the cheapest for volume hook testing.

Veo vs Sora vs Kling: which should I use?

Veo 3.1 for 8-second clips with the most reliable native audio and dialogue (245 credits, always starts from an image). Sora 2 when you need 12 seconds at 1080p for the same 245 credits, with strong physics for product-in-use shots. Kling 3.0 when the visual bar is highest: pro-tier cinematic motion at 1080p with audio, at 260 credits for 5 seconds. Test cheap, then scale the winner on the premium model.

What is the cheapest AI video model for testing hooks?

Grok Video is the cheapest in our catalog: 70 credits (about $0.69 on the Starter plan) for a 5-second clip at 720p, or 50 credits at 480p. Seedance 1.5 Pro is 100 credits for 5 seconds in 1080p and adds native audio. On the cheapest models you can test ten hook variants for the price of one premium clip.

Which AI model is best for talking-head UGC videos?

OmniHuman 1.5 if the actor must speak your exact script: it lip-syncs word for word, supports custom voice cloning, and renders up to 30 seconds in one take (490 credits for 15s, 980 for 30s). Pruna Avatar is the budget lip-sync option at 120 credits for 15 seconds. Happy Horse 1.1 delivers the most natural overall performance for standard testimonial-style ads.

How long can each AI video model generate?

Talking-head models go longest: OmniHuman 1.5 up to 30 seconds, Pruna Avatar 20 seconds, Happy Horse 15 seconds. Scene models cap lower: Seedance 2.0 and Kling 3.0 at 15 seconds, Sora 2 and Seedance 1.5 Pro at 12 seconds, Kling 2.6 at 10 seconds, Veo 3.1 at 8 seconds. For ads longer than any single cap, generate two clips and cut them together.

How much does one AI video ad actually cost?

In UGC Vids AI credits, real per-clip costs range from 50 credits (Grok Video, 5s at 480p) to 1,985 credits (Seedance 2.0, 15s at 4K). On the Starter plan ($49 for 5,000 credits) that is roughly $0.49 to $19.45 per clip, with the popular middle (Veo 3.1, Sora 2, Kling 2.6) landing around $1.23 to $2.40.

Found your model? Run it.

All of these models live in one dashboard on UGC Vids AI. It is free for 3 days, so you can generate your first ads, see which model actually suits your product, and keep whatever converts. Cancel anytime.

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