# Lightricks LTX 2.3 Fast Image to Video API

> Ltx 2.3 Fast is Lightricks's image-to-video AI model. Bring static images to life with fluid animation, consistent character motion, and professional-grade video output.

Source: https://www.sandbase.ai/models/lightricks/ltx-2.3-fast/image-to-video
API reference: https://www.sandbase.ai/models/lightricks/ltx-2.3-fast/image-to-video/docs

## Facts

- Provider: Lightricks
- Type: Video model
- Model ID: `lightricks/ltx-2.3-fast/image-to-video`
- Price: From $0.36 per run
- Capabilities: image 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-fast/image-to-video",
  "image": "https://static.sandbase.ai/examples/lightricks/ltx-2.3-fast/image-to-video/input_image_0.png",
  "prompt": "Snorkel lens ground-scraping tracking shot following a barefoot Ethiopian long-distance runner training on a dirt road at dawn, camera inches from the ground racing alongside, her feet kicking up red dust in slow motion at 240fps, Rift Valley landscape blurred in the background, the texture of earth and callused skin in hyper-detail, 40mm snorkel lens at ground height, Nike Running documentary meets Lubezki natural light, the poetry of human endurance",
  "duration": 6,
  "resolution": "1080p",
  "generate_audio": true
}'
```

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 Fast Image to Video through SandBase?

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

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

## README

### LTX 2.3 Fast Image to Video

LTX 2.3 Fast image to video: up to 20 second clips with native audio at 1080p, 1440p, or 4K (2160p). `image` is the first frame; `end_image` optionally the last.

#### Fields

| Field | Type | Default | Notes |
|---|---|---|---|
| `prompt` | string, required | — | Up to 5,000 characters. |
| `image` | image URL, required | — | First frame. JPEG, PNG, or WebP URL. |
| `end_image` | image URL | — | Optional last frame. |
| `resolution` | `1080p` / `1440p` / `2160p` | `1080p` | Sets the per-second rate. |
| `duration` | 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 | 6 | Output length in seconds. |
| `generate_audio` | boolean | true | Native audio. |
| `aspect_ratio` | `16:9` / `9:16` | — | Output frame shape. |

#### Billing

You pay for output seconds: $0.06 at 1080p, $0.12 at 1440p, $0.24 at 2160p.

| Output | 1080p | 1440p | 2160p |
|---|---|---|---|
| 6s (default) | $0.36 | $0.72 | $1.44 |
| 10s | $0.60 | $1.20 | $2.40 |
| 20s | $1.20 | $2.40 | $4.80 |

Failed runs are not charged.

#### Prompting

- Describe subject, action, camera, and sound.

#### 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`.