## How Billing Works

When you authenticate with an **API Key** (`x-api-key` header), you are billed under the **API tier**. Usage is deducted from your prepaid USD wallet. Check your balance at any time:

```
GET /v3/users/me → wallet
```

**OAuth vs API Key:** If you authenticate with an OAuth bearer token, usage is billed against your **web plan**, not the API tier. Check your web plan balance with `GET /v3/users/me → subscription`. Using an **API Key** is recommended for automation and integration workflows. API key authentication provides higher concurrency limits and is more flexible and powerful for programmatic use.

## Pricing

All rates are billed in USD based on output duration.

### Video Generation — Avatar IV

| Avatar Type  | 720p / 1080p | 4K          |
|--------------|---------------|--------------|
| Photo Avatar | $0.05 / sec   | $0.0667 / sec|
| Digital Twin | $0.0667 / sec | $0.0833 / sec|
| Studio Avatar | $0.0667 / sec | $0.0833 / sec|

### Video Generation — Avatar III

| Avatar Type  | 720p / 1080p  | 4K           |
|--------------|----------------|---------------|
| Photo Avatar | $0.0167 / sec  | $0.02 / sec   |
| Digital Twin | $0.0167 / sec  | $0.02 / sec   |
| Studio Avatar | $0.0167 / sec | $0.02 / sec   |

### Video Agent

| Feature         | Rate          |
|-----------------|---------------|
| Prompt to Video | $0.0333 / sec |

### Video Translation

| Mode                      | Rate          |
|---------------------------|---------------|
| Speed — Audio Only       | $0.0167 / sec |
| Speed — Lip Sync         | $0.0333 / sec |
| Precision — Lip Sync     | $0.0667 / sec |

> **Note:** Proofread mode is available on Enterprise plans only.

### Lipsync

| Mode      | Rate           |
|-----------|----------------|
| Speed     | $0.0333 / sec  |
| Precision | $0.0667 / sec  |

### Text-to-Speech

| Model                | Rate          |
|---------------------|---------------|
| Speech — Starfish   | $0.000667 / sec|

### Avatar Creation

| Operation       | Rate            |
|------------------|----------------|
| Digital Twin     | $1.00 per call  |
| Photo Avatar     | $1.00 per call  |