> ## Documentation Index
> Fetch the complete documentation index at: https://docs.summerengine.com/llms.txt
> Use this file to discover all available pages before exploring further.
# LTX-2.5 Pro
> LTX-2.5 Pro on the Summer API: $0.12 per second, MP4 saved to your Summer library. Model id video/ltx-2-5-pro.
Lightricks' open-source audio and video model, sound and picture in one pass.
| | |
| - | - |
| Model id | `video/ltx-2-5-pro` |
| Price | \$0.12 per second |
| Does | [Text to video](https://docs.summerengine.com/api/models.md#text-to-video), [Picture to video](https://docs.summerengine.com/api/models.md#picture-to-video) |
| Output | MP4 |
| Made by | Lightricks |
| Try it | [Examples and playground on summerengine.com](https://www.summerengine.com/models/ltx-2-5-pro) |
| Commercial use | Yes |
## Examples
Real outputs of `video/ltx-2-5-pro`, each with the input that made it.
From a picture: Hyperreal product orbit: the camera glides in a smooth three-quarter orbit around the statue as a light sweep travels across the sculpted cloak and painted face, dust motes…
Prompt: A cheerful cartoon fox girl adventurer in a green scarf skips across a sunny meadow toward the camera, waves and laughs, soft 3D animated film style, gentle camera push in
## Best for
* Cutscene beats with sound effects and ambience built in.
* Animating a key frame into a short establishing shot.
* Dialogue-free story moments for a trailer.
## Price
**\$0.12 per second**, counted from `duration`. Exact list price: `0.12 USD`.
At the default `duration` of 5 seconds: \$0.60.
| When | Price |
| - | - |
| `resolution` is `"1080p"` | \$0.17 per second |
No markup: this is the provider's list price, checked 2026-09-26. A failed job costs nothing. Get the exact price of one request, free and without a key, from [`POST /v1/estimate`](https://docs.summerengine.com/api/jobs#know-the-price-first).
## Example call
Sign in once with `summer login`; over HTTP, send `Authorization: Bearer $SUMMER_TOKEN` after `export SUMMER_TOKEN=$(summer token)` ([sign-in](https://docs.summerengine.com/api/sign-in.md)). This job takes minutes. The CLI follows it and saves the file. Over HTTP the call answers `running` with a job id: check `GET /v1/jobs/{id}` until `state` is `done` ([jobs](https://docs.summerengine.com/api/jobs.md)); the [quickstart](https://docs.summerengine.com/api/quickstart.md) has the full loop.
```bash CLI theme={null}
npx -y summer-engine@latest api run video/ltx-2-5-pro \
--input '{"prompt":"the treasure chest from the reference slowly opens on a mossy forest floor, warm light spills out","referenceImageUrls":["https://docs.summerengine.com/images/api/chest.png"],"duration":5}' \
--download .
```
```bash curl theme={null}
curl https://www.summerengine.com/v1/jobs \
-H "Authorization: Bearer $SUMMER_TOKEN" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-H "Prefer: wait=60" \
-d '{"model":"video/ltx-2-5-pro","input":{"prompt":"the treasure chest from the reference slowly opens on a mossy forest floor, warm light spills out","referenceImageUrls":["https://docs.summerengine.com/images/api/chest.png"],"duration":5}}'
```
```ts TypeScript theme={null}
const res = await fetch("https://www.summerengine.com/v1/jobs", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.SUMMER_TOKEN}`,
"Content-Type": "application/json",
"Idempotency-Key": crypto.randomUUID(),
Prefer: "wait=60",
},
body: JSON.stringify({
"model": "video/ltx-2-5-pro",
"input": {
"prompt": "the treasure chest from the reference slowly opens on a mossy forest floor, warm light spills out",
"referenceImageUrls": [
"https://docs.summerengine.com/images/api/chest.png"
],
"duration": 5
}
}),
});
const { job } = await res.json();
console.log(job.state, job.id);
```
```python Python theme={null}
import os, uuid, requests
res = requests.post(
"https://www.summerengine.com/v1/jobs",
headers={
"Authorization": f"Bearer {os.environ['SUMMER_TOKEN']}",
"Idempotency-Key": str(uuid.uuid4()),
"Prefer": "wait=60",
},
json={"model": "video/ltx-2-5-pro", "input": {"prompt": "the treasure chest from the reference slowly opens on a mossy forest floor, warm light spills out", "referenceImageUrls": ["https://docs.summerengine.com/images/api/chest.png"], "duration": 5}},
)
job = res.json()["job"]
print(job["state"], job["id"])
```
```js MCP theme={null}
// Summer's MCP server: npx -y summer-engine@latest setup --yes
summer_api_run({
model: "video/ltx-2-5-pro",
input: {
prompt: "the treasure chest from the reference slowly opens on a mossy forest floor, warm light spills out",
referenceImageUrls: ["https://docs.summerengine.com/images/api/chest.png"],
duration: 5
},
out: "assets",
})
// It answers `next` while the job runs: follow it to the end.
summer_api_job({ jobId: "", wait: true, out: "assets" })
```
The finished job has `state` `"done"` and `result.assets`: one entry per file, each with `assetId`, `fileUrl` (a Summer URL) and `thumbnailUrl`. Download the file into your project, or import it in Summer Engine by its asset id.
## Input
Send these fields in `input`. The full JSON Schema is `inputSchema` in [`GET /v1/models/video/ltx-2-5-pro`](https://docs.summerengine.com/api/reference/get-models-model).
| Field | Type | About |
| - | - | - |
| `prompt` | string | What happens in the clip. Needed without imageUrl. up to 4000 characters |
| `imageUrl` | string | A public image URL to animate (image to video). up to 2048 characters |
| `referenceImageUrls` | array of string | Reference to video: public images of the characters, props or style to keep (with a reference model, e.g. kling-4-ref). Motion transfer: the character to move. 1 to 10 items |
| `videoUrl` | string | An input clip (public URL, at most 20 s): restyle or reframe it, move a character with its motion, or add sound to it (e.g. kling-video-to-audio). Billed on the clip's length. up to 2048 characters |
| `duration` | integer | Seconds; the model renders its nearest supported length. 1 to 20 Default `5`. |
| `aspectRatio` | `16:9`, `9:16`, `1:1`, `4:3`, `3:4`, `21:9`, `3:2`, `2:3`, `auto` | Default `"16:9"`. |
| `negativePrompt` | string | What the clip must not show. up to 1000 characters |
| `resolution` | `720p`, `1080p`, `4k`, `480p`, `768p`, `2k`, `768P`, `1080P`, `480P` | Only a quality the model offers; leave out for its default. |
## Related models
> **[Kling 3.0 Standard](https://docs.summerengine.com/api/models/video/kling-3.md)**
>
> `video/kling-3`: \$0.14 per second (default)
> **[Gemini Omni Flash](https://docs.summerengine.com/api/models/video/gemini-omni-flash.md)**
>
> `video/gemini-omni-flash`: \$0.125 per second
> **[Kling 3.0 Pro](https://docs.summerengine.com/api/models/video/kling-3-pro.md)**
>
> `video/kling-3-pro`: \$0.168 per second
> **[Seedance 2.0 Fast](https://docs.summerengine.com/api/models/video/seedance-2-fast-ref.md)**
>
> `video/seedance-2-fast-ref`: \$0.242 per second
## For agents
This page as Markdown: [https://docs.summerengine.com/api/models/video/ltx-2-5-pro.md](https://docs.summerengine.com/api/models/video/ltx-2-5-pro.md). The live record with the JSON Schema: `GET https://www.summerengine.com/v1/models/video/ltx-2-5-pro`, public, no sign-in.
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