LTX 2.5 API reference
Long 20-second takes up to 4K with a soundtrack
Call LTX 2.5 from your own code with one PopNow API key. Below are the exact model IDs to send, every input field the model accepts, what each request costs in credits, and a request you can paste into a terminal.
At a glance
- Made by
- Lightricks
- Output
- Video
- From
- 13.5 credits per second of output ($0.135)
1 credit = $0.01. A task holds the highest possible charge when it is accepted and settles the real amount when it finishes, rounded up to whole credits; failed tasks are not charged. Ask POST /api/v1/jobs/quote for the exact figure before you run.
Create Video
lightricks/ltx-2.5/text-to-video
Price
| Option | Credits (per second of output) | US dollars |
|---|---|---|
720p | 13.5 | $0.135 |
1080p | 19.5 | $0.195 |
2k | 28.5 | $0.285 |
4k | 45 | $0.45 |
Parameters
| Field | Type | Default | Allowed | What it does |
|---|---|---|---|---|
promptRequired | string | — | — | Describe the picture and the action you want. |
resolutionOptional | string | 720p | 720p, 1080p, 2k, 4k | Output resolution. |
aspect_ratioOptional | string | 16:9 | 16:9, 9:16 | Output aspect ratio. |
duration_secondsOptional | integer | 5 | 5 to 20 | Requested output length in seconds. |
seedOptional | integer | — | 0 to 2147483647 | Random seed. Keep it fixed only for controlled comparisons, not as a frame-identical guarantee. |
Example request
This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.
curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask" \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-d '{
"model": "lightricks/ltx-2.5/text-to-video",
"input": {
"prompt": "A paper boat drifts down a rain-soaked street at dusk, neon signs reflecting in the water, slow tracking shot at ground level",
"duration_seconds": 5,
"resolution": "720p"
}
}'The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
-H "Authorization: Bearer $POPNOW_API_KEY"Image to Video
lightricks/ltx-2.5/image-to-video
Price
| Option | Credits (per second of output) | US dollars |
|---|---|---|
720p | 13.5 | $0.135 |
1080p | 19.5 | $0.195 |
2k | 28.5 | $0.285 |
4k | 45 | $0.45 |
Parameters
| Field | Type | Default | Allowed | What it does |
|---|---|---|---|---|
promptRequired | string | — | — | Describe what happens after the opening frame: the action and the camera. |
image_urlRequired | string (uri) | — | — | Authorised opening frame. |
last_image_urlOptional | string (uri) | — | — | Optional closing frame the clip should resolve to. |
resolutionOptional | string | 720p | 720p, 1080p, 2k, 4k | Output resolution. |
duration_secondsOptional | integer | 5 | 5 to 20 | Requested output length in seconds. |
seedOptional | integer | — | 0 to 2147483647 | Random seed. Keep it fixed only for controlled comparisons, not as a frame-identical guarantee. |
Example request
This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.
The example uses PopNow sample files in image_url. Replace them with your own public HTTPS links, uploads or saved assets.
curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask" \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-d '{
"model": "lightricks/ltx-2.5/image-to-video",
"input": {
"prompt": "He lands softly on the rooftop, laughs and turns toward the camera while the balloons sway in the evening breeze; slow push-in",
"image_url": "https://media.popnow.ai/influencer/examples/marco.webp",
"duration_seconds": 5,
"resolution": "720p"
}
}'The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
-H "Authorization: Bearer $POPNOW_API_KEY"