For a birthday video you start from one photo of a real person, so the model's job is image-to-video: animate that photo naturally while keeping the face recognizable. Here's how the leading models compare for that specific task.
Comparison
| Model | Face consistency | Native audio | Speed | Cost (per clip) | Best for |
|---|---|---|---|---|---|
| Seedance 1.0 Pro Fast (ByteDance) | Good | No | Fast | ~$0.08 | Best value for photo→birthday |
| Kling | Excellent | No | Medium | ~$0.07–0.28 | Best face fidelity |
| Google Veo 3 | Good | Yes | Slow | ~$0.40+ | Native audio, premium quality |
What matters for a birthday video
- Face consistency — the birthday star must still look like themselves. Kling leads here; Seedance is close.
- Audio — Veo generates native audio, but it's ambient sound, not a controllable birthday song. For a curated birthday BGM you're better off adding the music yourself, which means a cheaper no-audio model is fine.
- Cost & speed — for a single gift you want fast and affordable. Seedance Fast is ~5–25× cheaper than Veo.
Our pick
For a birthday gift, Seedance 1.0 Pro Fast is the sweet spot: cheap, fast, good face consistency — and since the birthday text and music are added on top anyway, you don't pay extra for native audio you can't control. That's the model HappyHouse uses by default.
Want top face fidelity instead? Kling is a great upgrade. Want native audio at any cost? Veo 3.
