# LTX-2.5 Fast

> The fast edition — video from words or from a first and last frame, in wide or tall, with sound if you want it.

**LTX-2.5 Fast** is the fast edition: video from your words, or a first frame — and a last one, if you add it — brought to life. When Studio offers it, you find it under **Videos** on Studio's home and **Generation** in **Choose a model**.

## What it takes and makes

### Make — words to video

| Setting | What it takes |
| --- | --- |
| Your words | Required — up to 5,000 characters |
| Length | 6, 8 or 10 seconds — starts at 6 seconds |
| Quality | 720p or 1080p — starts at 720p |
| Shape | 16:9 or 9:16 — starts at 16:9 |
| Sound | Can make sound with the video — a switch, off until you turn it on |
| Makes | A video |

### Animate — a picture comes to life

| Setting | What it takes |
| --- | --- |
| Your words | Required — up to 5,000 characters |
| Frames | A first frame (required) and, if you like, a last frame |
| Length | 6, 8 or 10 seconds — starts at 6 seconds |
| Quality | 720p or 1080p — starts at 720p |
| Shape | 16:9 or 9:16 — starts at 16:9 |
| Sound | Can make sound with the video — a switch, off until you turn it on |
| Makes | A video |

The price is never written here — prices change. It is on the model's page in Studio: on the **Make** button and beside each length, size or quality that changes it, before you press.

## Writing for it

- An empty or one-letter prompt is turned away before anything is sent.
- **From a frame, you choose the shape.** Unlike most models here, its **Animate** takes the shape you pick, not your frame's — so a square picture can become a wide or a tall take.

Source: https://routix.studio/help/video-models/ltx-2-5-fast · Updated 2026-10-20