# Sync Labs Sync 3 Lipsync API

> Sync 3 by sync. re-animates the speaker's lips in an existing video to match new audio, with studio-grade identity preservation.

Source: https://www.sandbase.ai/models/sync/lipsync/3.0/video-to-video
API reference: https://www.sandbase.ai/models/sync/lipsync/3.0/video-to-video/docs

## Facts

- Provider: Sync Labs
- Type: Video model
- Model ID: `sync/lipsync/3.0/video-to-video`
- Price: From $0.68 per run
- Capabilities: video to video
- Billing: pay per use from one SandBase balance; no provider account or subscription needed

## Call it

- Unified Run API: `POST https://api.sandbase.ai/v1/run`

```bash
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "sync/lipsync/3.0/video-to-video",
  "audio": "https://static.sandbase.ai/examples/sync/lipsync/v3/input_audio_1.wav",
  "video": "https://static.sandbase.ai/examples/sync/lipsync/v3/output_url_0.mp4",
  "sync_mode": "cut_off"
}'
```

The response returns a run id; poll `GET https://api.sandbase.ai/v1/run/{id}` until the status is `completed` or `failed`.

## FAQ

### How do I call Sync Labs Sync 3 Lipsync through SandBase?

Create a SandBase API key, then send requests with the model ID "sync/lipsync/3.0/video-to-video" to Unified Run API (/v1/run) at https://api.sandbase.ai. The request examples on this page show the exact payload.

### Do I need a separate Sync Labs account?

No. One SandBase API key and balance gives you access to Sync Labs Sync 3 Lipsync and the other models in the catalog; you do not need to sign up with Sync Labs separately.

## README

### Sync 3 Lipsync

Sync 3 re-animates the speaker's lips in an existing video to match new audio, with strong identity preservation.

#### Fields

| Field | Type | Default | Notes |
|---|---|---|---|
| `video` | video URL, required | — | Video with the speaker. |
| `audio` | audio URL, required | — | Speech to sync. |
| `sync_mode` | `cut_off` / `loop` / `bounce` / `silence` / `remap` | `cut_off` | What to do when audio and video lengths differ. |

#### Billing

$0.135 per output second. The quote before submission assumes 5 seconds; the final charge uses the measured length.

| Output | Price |
|---|---|
| 5s | $0.675 |
| 30s | $4.05 |
| 60s | $8.10 |

Failed runs are not charged.

#### Also on SandBase

Related: `sync/lipsync/3.0/image-to-video`.