# Kling 4.0 Flash

> The quick edition of Kling 4.0 — from words, from a first frame, from your reference pictures, or on a clip of yours.

**Kling 4.0 Flash** is the quick edition of [Kling 4.0](https://routix.studio/help/video-models/kling-4-0). It works four ways: from your words alone, from a picture of yours as the first frame, from reference pictures that guide a new video, and on a clip you already have, changing what your words say. 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 10,000 characters |
| Length | 3 to 20 seconds — starts at 5 seconds |
| Shape | 16:9, 9:16, 1:1 or 21:9 — starts at 16:9 |
| Sound | Silent video |
| Makes | A video |

### Animate — a picture comes to life

| Setting | What it takes |
| --- | --- |
| Your words | Required — up to 10,000 characters |
| Frames | A first frame (required) |
| Length | 3 to 20 seconds — starts at 5 seconds |
| Shape | Follows your first frame |
| Sound | Silent video |
| Makes | A video |

### Reference — your pictures and clips guide a new video

| Setting | What it takes |
| --- | --- |
| Your words | Required — up to 10,000 characters |
| Pictures | Up to 10 pictures (Image 1, Image 2… in the order you add them) |
| Length | 3 to 20 seconds — starts at 5 seconds |
| Shape | Auto, 16:9, 9:16, 1:1 or 21:9 — starts at 16:9 |
| Naming your references | Type @ and pick one — one of each kind, read as “the picture”, “the clip” or “the sound” |
| Sound | Silent video |
| Makes | A video |

### Edit — change a clip you already have

| Setting | What it takes |
| --- | --- |
| Your words | Required — up to 10,000 characters |
| Your clip | One video clip, 3 to 20 seconds long |
| Pictures | Up to 10 pictures (Image 1, Image 2… in the order you add them) |
| Length | Follows your clip |
| Shape | Follows your clip |
| Naming your references | Type @ and pick one — one of each kind, read as “the picture”, “the clip” or “the sound” |
| Sound | Silent video |
| 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

Say what happens, in order. From a frame, the video keeps your picture's shape.

With reference pictures, name each one where it matters — type @ and pick it.

**Edit** changes what you describe on a short clip of yours; add pictures to show what the change should look like.

Source: https://routix.studio/help/video-models/kling-4-0-flash · Updated 2026-11-09