LTX-2.5 Fast uses the model ID lightricks/ltx-2.5/text-to-video/fast. LTX-2.5 Fast Text to Video on Runware with native audio and optional camera movement.
1. Calling the API
Send requests to https://api.higgsfield.ai/lightricks/ltx-2.5/text-to-video/fast with a JSON body matching the parameters below.
Install
Install an official server-side SDK. cURL needs no package.
npm install @higgsfield/clientSetup
Keep credentials in server-side environment variables. The SDKs accept the same KEY_ID:KEY_SECRET value under their documented variable names.
export HF_CREDENTIALS="YOUR_KEY_ID:YOUR_KEY_SECRET" # TypeScript
export HF_KEY="YOUR_KEY_ID:YOUR_KEY_SECRET" # Python and cURLRequest parameters
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
fps | integer | No | 25 | Frames per second. Options: 24, 25, 48, 50. |
prompt | string | Yes | — | Prompt. Minimum length: 2. Maximum length: 5000. |
duration | integer | Yes | 6 | Duration. Options: 6, 8, 10. |
resolution | string | No | "720p" | Resolution. Options: 720p, 1080p, 2k, 4k. |
aspect_ratio | string | No | "16:9" | Aspect ratio. Options: 16:9, 9:16. |
generate_audio | boolean | No | true | Generate audio. |
camera_movement | string | No | — | Camera movement. Options: dolly_in, dolly_out, dolly_left, dolly_right, jib_up, jib_down, static, focus_shift. |
2. Authentication
The official SDKs read credentials from the server environment and send the required Authorization: Key KEY_ID:KEY_SECRET header.
API Key
Never expose the secret in browser-side code or commit it to source control. The TypeScript SDK is server-side only. For direct HTTP calls, use:
Authorization: Key $HF_KEY3. Queue
subscribe submits the asynchronous request and waits for a terminal result. The TypeScript SDK polls automatically when withPolling: true; the Python SDK's synchronous subscribe call also waits. A completed request returns the generated file in the video field.
Submit and wait
import { config, higgsfield } from "@higgsfield/client/v2";
config({
credentials: process.env.HF_CREDENTIALS,
});
const result = await higgsfield.subscribe(
"lightricks/ltx-2.5/text-to-video/fast",
{
input: {
"fps": 25,
"prompt": "A cinematic scene at sunset",
"duration": 6,
"resolution": "720p",
"aspect_ratio": "16:9",
"generate_audio": true
},
withPolling: true,
},
);
console.log(result);Explicit lifecycle control
Use the Python SDK when a worker needs explicit status, result, or cancellation control for an existing request. The TypeScript v2 client currently exposes automatic polling through subscribe.
import higgsfield_client
request_id = "{request_id}"
status = higgsfield_client.status(request_id=request_id)
result = higgsfield_client.result(request_id=request_id)
higgsfield_client.cancel(request_id=request_id)