---
title: "Gemini Omni Flash Extend"
description: "Gemini Omni Flash Extend adds 3 to 10 seconds after an existing clip. The model reads the last 10 seconds of the source, so the motion, the camera and the sound continue across the join. The result is the source followed by the new footage, in one clip."
url: https://docs.roasos.com/models/video/gemini-omni-flash-extend
---

# Gemini Omni Flash Extend

<Callout>
  Family 

  `video`

   · model 

  `gemini-omni-flash-extend`

   · catalog 

  `model-catalog@2026-10-06.v5`

   · pricing 

  `customer-pricing@2026-11-05.v15`

  .
</Callout>

## Endpoint

```http
POST https://api.roasos.com/v1/video/gemini-omni-flash-extend
```

Send your API key as a bearer token. The key needs the scope `api:write`. Every paid request also needs an `Idempotency-Key` header.

The envelope fields `quote_only`, `quote_id`, `webhook_url` and `wait_timeout_seconds` behave the same on each model endpoint. Refer to [Jobs](/concepts/jobs) and [Quotes and credits](/concepts/quotes-and-credits).

## Good at

Grow a take past its first render without a visible cut: a talking head that keeps speaking, a camera move that keeps going, a product reveal after a UGC clip. Send `video_url` (1 to 60 seconds, up to 100 MiB, MP4) and `prompt`. `duration_seconds` sets the new footage (3 to 10). The source sets the framing, so there is no aspect ratio. Sound is always generated. You cannot send an audio file. The source does not have to be a Gemini clip.

## Pricing

The unit is one **clip**. Pricing key: `gemini-omni-flash-extend`.

| Request    | Credits |
| ---------- | ------- |
| `3s_720p`  | 3       |
| `7s_720p`  | 7       |
| `10s_720p` | 10      |

The credits come from the roasOS pricing table. No other field changes the price. To get the exact price of your request, send it with `quote_only: true` first.

## Modes

* `edit`

Provider endpoints: `google/gemini-omni-flash/v1.2/extend`.

## Request fields

| Field                  | Type         | Required | Default | Rule                                    |
| ---------------------- | ------------ | -------- | ------- | --------------------------------------- |
| `duration_seconds`     | integer enum | no       | `8`     | `3`, `4`, `5`, `6`, `7`, `8`, `9`, `10` |
| `prompt`               | string       | yes      | —       | ≥ 1 character; ≤ 10,000 characters      |
| `quote_id`             | string       | no       | —       | UUID                                    |
| `quote_only`           | boolean      | no       | `false` | —                                       |
| `resolution`           | enum         | no       | `720p`  | `360p`, `720p`, `1080p`, `4k`           |
| `video_url`            | string       | yes      | —       | https URL; ≤ 4,096 characters           |
| `wait_timeout_seconds` | integer      | no       | `0`     | 0–60                                    |
| `webhook_url`          | string       | no       | —       | https URL; ≤ 4,096 characters           |

The schema is strict. A field that is not in this table gets `400 unsupported_option`. The field names are the roasOS role names. One role has one name in every family.

## Media

This endpoint accepts these media roles:

* `video_url` — the source video

Every other role is refused: `avatar_id`, `elements`, `product_id`, `product_images`, `references`, `reference_images`, `image_url`, `end_image_url`, `scene_id`, `scene_image`, `video_urls`, `audio_urls`, `audio_url`, `voice_id`. A refused role gets `400 unsupported_option`.

<Callout>
  Each media URL must be an immutable object on 

  `https://cdn.roasos.com`

   that your workspace owns. Any other URL gets 

  `400 reference_media_not_workspace_owned`

  . Refer to 

  [Reference media and uploads](/concepts/reference-media)

   to learn how to put a file there.
</Callout>

## Prompt

Limit 10,000 characters.

* Describe what happens next, not the source. The model reads the source.
* Keep one action and one camera move, and say where the move ends.
* To continue speech, quote the next line with the speaker and the delivery.

## Not exposed

These catalog entries describe omitted inputs, pinned values and source constraints. They do not imply that the provider accepts every listed field.

* `aspect_ratio` — not accepted by this public endpoint.
* `generate_audio` — not accepted by this public endpoint.
* `audio` — pinned to `no audio input exists on the provider; sound is always generated`.

## Result

The result kind is `video`. Always present: `url`.

```json
{
  "data": {
    "id": "gen_…",
    "kind": "video",
    "model": "gemini-omni-flash-extend",
    "status": "completed",
    "result": {
      "url": "https://cdn.roasos.com/workspaces/ws_01/result"
    }
  }
}
```

The files are immutable objects on `https://cdn.roasos.com`. A result URL is a valid media input for your next request.

## Example

The three steps are always the same: quote, run, poll.

<CodeBlockTabs defaultValue="cURL">
  <CodeBlockTabsList>
    <CodeBlockTabsTrigger value="cURL">
      cURL
    </CodeBlockTabsTrigger>

    <CodeBlockTabsTrigger value="JavaScript">
      JavaScript
    </CodeBlockTabsTrigger>

    <CodeBlockTabsTrigger value="Python">
      Python
    </CodeBlockTabsTrigger>
  </CodeBlockTabsList>

  <CodeBlockTab value="cURL">
    ```bash
    # 1. Quote. Nothing is spent.
    curl -X POST https://api.roasos.com/v1/video/gemini-omni-flash-extend \
      -H "Authorization: Bearer roasos_sk_live_..." \
      -H "Idempotency-Key: 0f1c9e2a-gemini-omni-flash-extend-0001" \
      -H "Content-Type: application/json" \
      -d '{"quote_only":true,"prompt":"A woman holds the bottle at eye level in a bright kitchen, morning light, static camera.","video_url":"https://cdn.roasos.com/workspaces/ws_01/uploads/video_url.mp4"}'
    # 200 { "data": { "kind": "quote", "quote_id": "q_7Hk...", "credits": 3, "expires_at": "...",
    #        "confirmation": { "model": "gemini-omni-flash-extend", "example": "3s_720p" } } }

    # 2. Run. Same body, same Idempotency-Key, quote_id in place of quote_only.
    curl -X POST https://api.roasos.com/v1/video/gemini-omni-flash-extend \
      -H "Authorization: Bearer roasos_sk_live_..." \
      -H "Idempotency-Key: 0f1c9e2a-gemini-omni-flash-extend-0001" \
      -H "Content-Type: application/json" \
      -d '{"quote_id":"q_7Hk...","prompt":"A woman holds the bottle at eye level in a bright kitchen, morning light, static camera.","video_url":"https://cdn.roasos.com/workspaces/ws_01/uploads/video_url.mp4"}'
    # 201 { "data": { "id": "gen_...", "status": "queued", "credits_reserved": 3 } }

    # 3. Poll, then read the result.
    curl https://api.roasos.com/v1/jobs/gen_.../status -H "Authorization: Bearer roasos_sk_live_..."
    curl https://api.roasos.com/v1/jobs/gen_.../result -H "Authorization: Bearer roasos_sk_live_..."
    ```
  </CodeBlockTab>

  <CodeBlockTab value="JavaScript">
    ```javascript
    const key = process.env.ROASOS_API_KEY;
    const url = "https://api.roasos.com/v1/video/gemini-omni-flash-extend";
    const idempotencyKey = "0f1c9e2a-gemini-omni-flash-extend-0001";
    const input = {
      "prompt": "A woman holds the bottle at eye level in a bright kitchen, morning light, static camera.",
      "video_url": "https://cdn.roasos.com/workspaces/ws_01/uploads/video_url.mp4"
    };

    const post = (payload) =>
      fetch(url, {
        method: "POST",
        headers: {
          Authorization: `Bearer ${key}`,
          "Idempotency-Key": idempotencyKey,
          "Content-Type": "application/json",
        },
        body: JSON.stringify(payload),
      }).then((response) => response.json());

    // 1. Quote. Nothing is spent.
    const quote = await post({ quote_only: true, ...input });
    console.log(quote.data.credits);

    // 2. Run.
    const job = await post({ quote_id: quote.data.quote_id, ...input });

    // 3. Poll, then read the result.
    let status = "queued";
    while (status !== "completed" && status !== "failed" && status !== "canceled") {
      await new Promise((done) => setTimeout(done, 3000));
      const poll = await fetch(`${url.split("/v1")[0]}/v1/jobs/${job.data.id}/status`, {
        headers: { Authorization: `Bearer ${key}` },
      }).then((response) => response.json());
      status = poll.data.status;
    }

    const result = await fetch(`${url.split("/v1")[0]}/v1/jobs/${job.data.id}/result`, {
      headers: { Authorization: `Bearer ${key}` },
    }).then((response) => response.json());
    console.log(result.data.result);
    ```
  </CodeBlockTab>

  <CodeBlockTab value="Python">
    ```python
    import os, time, requests

    key = os.environ["ROASOS_API_KEY"]
    url = "https://api.roasos.com/v1/video/gemini-omni-flash-extend"
    headers = {
        "Authorization": f"Bearer {key}",
        "Idempotency-Key": "0f1c9e2a-gemini-omni-flash-extend-0001",
    }
    payload = {
        "prompt": "A woman holds the bottle at eye level in a bright kitchen, morning light, static camera.",
        "video_url": "https://cdn.roasos.com/workspaces/ws_01/uploads/video_url.mp4"
    }

    # 1. Quote. Nothing is spent.
    quote = requests.post(url, headers=headers, json={"quote_only": True, **payload}).json()
    print(quote["data"]["credits"])

    # 2. Run.
    job = requests.post(url, headers=headers, json={"quote_id": quote["data"]["quote_id"], **payload}).json()
    job_id = job["data"]["id"]

    # 3. Poll, then read the result.
    jobs = "https://api.roasos.com/v1/jobs"
    status = "queued"
    while status not in ("completed", "failed", "canceled"):
        time.sleep(3)
        status = requests.get(f"{jobs}/{job_id}/status", headers=headers).json()["data"]["status"]

    result = requests.get(f"{jobs}/{job_id}/result", headers=headers).json()
    print(result["data"]["result"])
    ```
  </CodeBlockTab>
</CodeBlockTabs>

## The deprecated path

`POST /v1/generations` still reaches this model for one minor version. It is deprecated. This is how it maps:

`POST /v1/video/gemini-omni-flash-extend` with `video_url`, `prompt`, `duration_seconds` (3-10, default 8) and `resolution` (360p|720p|1080p|4k, default 720p). The agent `extendVideo` tool uses this lane for Gemini clips.

## See also

* [`llms.txt` for this model](https://docs.roasos.com/models/video/gemini-omni-flash-extend/llms.txt) — the same facts as one plain-text file for an agent.
* `GET https://api.roasos.com/v1/catalog/gemini-omni-flash-extend` — the machine-readable form: enums, defaults, limits and prices. Refer to the [API reference](/api-reference/overview).
* [Jobs](/concepts/jobs) — how to poll a job and read its result.
* Provider endpoints: `google/gemini-omni-flash/v1.2/extend`.