Why model choice matters more than prompt engineering
AI video models aren't interchangeable. Sora 2 Pro is best at photoreal crowds. Kling 3.0 owns character motion. Hailuo 2.3 nails anime. Veo 3.1 ships native audio. Pika 2.2 is the experimental / viral lane.
If you write a perfect cinematic-crowd prompt and run it on Pika, you'll get a stylized result and assume the prompt is bad. The prompt was fine — Pika just isn't the right tool for cinematic crowds.
tip
Match the model to the scene first, then iterate the prompt. The scene-to-model fit is 80% of the output quality.
The 5-minute mental model
Here's the rough mental map. Read it once, internalize it, stop guessing.
- Photoreal hero shot, narrated ad, complex crowd → Sora 2 Pro
- Character action, dialog scenes, dance, fights → Kling 3.0
- Brand video with native voice-over → Veo 3.1
- Anime, stylized, vibrant Asian aesthetic → Hailuo 2.3
- Photoreal landscapes, drone shots, natural lighting → Luma Ray 2
- Bulk multilingual production with audio → Seedance 2.0
- Viral / experimental / abstract content → Pika 2.2
- Fast cheap drafts of character work → Kling 2.5 Turbo
- Cheapest social-volume content (no audio) → Wan 2.6
- Animate a portrait (script + face) → HeyGen V3
- Lip-sync your audio onto a photo → Omnihuman
When to skip the picker entirely
If you're not sure which lane your prompt is in, gVideo's AI Smart Picker reads the prompt and recommends the top 3 with a confidence score and a one-sentence reason per pick. The recommendation card appears under the prompt input ~1.5 seconds after you stop typing.
Better than the cheat-sheet: click 'Generate all 3 side-by-side' and the Studio runs the picker's top 3 in parallel. You see actual outputs from three different models on the same prompt and pick the winner. Costs 3× a single generation but eliminates the guess-wrong-and-redo cycle.
The 80/20 starter recipe
If you're new to AI video and want a simple default: use Kling 3.0 as your daily driver. It's the best value-per-second across diverse scenes. Reach for Sora 2 Pro only when fidelity matters (paid ads, hero shots, pitch deck deliverables). Reach for Hailuo only when the brief specifically calls for anime aesthetic.
That single Kling-default rule covers ~70% of typical creator workflow. The Smart Picker + side-by-side compare handle the rest.