> ## Documentation Index
> Fetch the complete documentation index at: https://heygen-1fa696a7.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Avatar III

> Avatar III is a HeyGen rendering engine on the v3 API, built around a dedicated photo-to-video pipeline — a higher-quality re-engineered model for photo avatars and video avatars (digital twins and studio avatars).

A single `engine` value resolves to the right product based on the avatar look type — mirroring how `avatar_iv` already serves both photo and video avatars:

| Look type       | Resolves to  | Max resolution |
| --------------- | ------------ | -------------- |
| `digital_twin`  | Digital Twin | 4K             |
| `studio_avatar` | Digital Twin | 4K             |
| `photo_avatar`  | Photo Avatar | 1080p          |

## Supported avatar types

`digital_twin`, `studio_avatar`, `photo_avatar` — pass the look's `avatar_id` in the request.

Studio avatar looks are video avatars, so they take the same Digital Twin pipeline as `digital_twin` looks — same 4K support and the same [Digital Twin rate](/docs/pricing#video-generation-avatar-iii).

For `motion_prompt`, `expressiveness`, or animating an arbitrary image, use [Avatar IV](/avatar-iv).

## Example request

Select Avatar III by passing `"engine": { "type": "avatar_iii" }` in your [`POST /v3/videos`](/reference/create-video) request:

```bash theme={null}
curl -X POST "https://api.heygen.com/v3/videos" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "avatar",
    "avatar_id": "YOUR_PHOTO_AVATAR_LOOK_ID",
    "script": "Hello from Avatar III.",
    "voice_id": "YOUR_VOICE_ID",
    "resolution": "1080p",
    "engine": { "type": "avatar_iii" }
  }'
```

Video generation is asynchronous — the response returns a `video_id` you poll with `GET /v3/videos/{video_id}`. For pricing, see [Self-Serve Pricing](/docs/pricing#video-generation-avatar-iii) and [Enterprise Pricing](/docs/enterprise-pricing#video-generation-avatar-iii). To compare engines, see [Models](/models).