# Lightricks LTX 2.3 Pro Video Extend API

> Ltx 2.3 Pro Extend by Lightricks - AI-powered video editing and transformation. Apply style transfer, motion control, lip-sync, and visual effects to existing videos with natural language instructions.

Source: https://www.sandbase.ai/models/lightricks/ltx-2.3-pro/video-extend
API reference: https://www.sandbase.ai/models/lightricks/ltx-2.3-pro/video-extend/docs

## Facts

- Provider: Lightricks
- Type: Video model
- Model ID: `lightricks/ltx-2.3-pro/video-extend`
- Price: From $0.50 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": "lightricks/ltx-2.3-pro/video-extend",
  "video": "https://static.sandbase.ai/examples/lightricks/ltx-2.3-pro/extend/input_video_0.mp4",
  "prompt": "Continue the motion smoothly",
  "duration": 5
}'
```

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 Lightricks LTX 2.3 Pro Video Extend through SandBase?

Create a SandBase API key, then send requests with the model ID "lightricks/ltx-2.3-pro/video-extend" 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 Lightricks account?

No. One SandBase API key and balance gives you access to Lightricks LTX 2.3 Pro Video Extend and the other models in the catalog; you do not need to sign up with Lightricks separately.

## README

### LTX 2.3 Pro Video Extend

LTX 2.3 Pro extend: continue a clip with 2–20 seconds of new footage.

#### Fields

| Field | Type | Default | Notes |
|---|---|---|---|
| `prompt` | string, required | — | Up to 5,000 characters. |
| `video` | video URL, required | — | Clip to continue. |
| `duration` | integer 2–20 | 5 | Seconds of new footage. |

#### Billing

$0.10 per new second.

| Output | Price |
|---|---|
| 2s | $0.20 |
| 5s (default) | $0.50 |
| 10s | $1.00 |
| 20s | $2.00 |

Failed runs are not charged.

#### Prompting

- Describe what happens next.

#### Also on SandBase

Other LTX 2.3 endpoints: `lightricks/ltx-2.3-pro/text-to-video`, `lightricks/ltx-2.3-pro/image-to-video`, `lightricks/ltx-2.3-pro/audio-to-video`, `lightricks/ltx-2.3-pro/retake`.