LTX 2.3 Fast

LTX · Video · Text → Video

Fast 2.3 with long video support — up to 20s at 1080p with aspect ratio control.

Model ID: ltx-v2.3-fastWorkflow: ltx-2.3/text-to-video/fast

Image InputFastUp to 20sAudio4K16:9 / 9:16

Try on Playground ↗

SDK API Advanced Usage Pricing

Install the SDK

The SDK targets Node 20+ and ships with TypeScript types.

npm

npm install @picsart/ai-sdk

Authenticate

Create a client once with your API key — it's sent as a bearer token on every request.

TypeScript

import { createClient } from '@picsart/ai-sdk';

const ai = createClient({
  apiKey: process.env.PICSART_API_KEY, // sent as: Authorization: Bearer <key>
  apiUrl: 'https://api.green-salad-4efd.toolsminati.workers.dev',
});

Run the model

Call the model with its parameters. This example uses the required ones.

TypeScript

import { createClient } from '@picsart/ai-sdk';

const ai = createClient({
  apiKey: process.env.PICSART_API_KEY,
  apiUrl: 'https://api.green-salad-4efd.toolsminati.workers.dev',
});

const result = await ai.generate('ltx-v2.3-fast', {
  prompt: "A serene mountain lake at golden hour, ultra detailed",
  duration: 6,
  resolution: "1080p",
  aspectRatio: "16:9"
});

console.log(result.url); // video URL

Parameters

8 parameters. Required ones must be supplied; the rest fall back to their defaults. The API takes these same names over HTTP.

Parameter	Type	Required	Default	Details
`prompt` Prompt	`text`	yes	`—`	max 5000 chars
`duration`	`enum`	no	`6`	6, 8, 10, 12, 14, 16, 18, 20
`resolution`	`enum`	no	`1080p`	1080p, 1440p, 2160p
`aspectRatio`	`enum`	no	`16:9`	16:9, 9:16
`fps` FPS	`enum`	no	`25`	24, 25, 48, 50
`generateAudio`	`boolean`	no	`true`	—
`imageUrls` Start Image	`file (image[])`	no	`—`	—
`endFrame` End Frame	`file (image)`	no	`—`	—

Output

generate() resolves once the job completes. A video URL.

Result

{
  "items": [
    {
      "url": "https://cdn.green-salad-4efd.toolsminati.workers.dev/…/result"
    }
  ],
  "model": "ltx-v2.3-fast"
}