> For the complete documentation index, see [llms.txt](https://bountyv.gitbook.io/vdocs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bountyv.gitbook.io/vdocs/frontier-passthrough/frontier-omni-flash.md).

# Omni Flash

Google's `gemini-omni-flash-preview` text-to-video, via the Gemini Interactions API. **Synchronous** — the finished mp4 comes back in a single call, no polling.

```
POST /api/v1/frontier/omni-flash
```

That's the reason to reach for this lane: every other video endpoint on the platform is submit-and-poll.

## Authentication

```
Authorization: Bearer sk_live_...
```

## Request

**Content-Type:** `application/json`

| Field          | Type   | Required | Default  | Description           |
| -------------- | ------ | -------- | -------- | --------------------- |
| `prompt`       | string | ✅        | —        | The scene to generate |
| `aspect_ratio` | string | —        | `"16:9"` | `"16:9"` \| `"9:16"`  |

Text-to-video only — Omni Flash takes no reference image on this API.

The model chooses its own clip length, **3–10 seconds at 720p**; there is no duration parameter to pass through. Budget for the upper end: a 10s clip costs us roughly 3× a 3s one, which the flat price already absorbs.

Because the call is synchronous, expect the request to stay open for the length of the render. Set your client timeout generously.

## Response

```json
{
  "video": "https://.../generations/<id>.mp4?token=...",
  "generation_id": "gJ8nP3kQ2m",
  "model": "gemini-omni-flash-preview",
  "aspect_ratio": "16:9",
  "charged_cents": 249,
  "balance_cents": 4551,
  "elapsed_ms": 48210
}
```

| Field           | Type           | Description                                                        |
| --------------- | -------------- | ------------------------------------------------------------------ |
| `video`         | string         | Signed URL when the clip persists, otherwise an inline `data:` URL |
| `generation_id` | string \| null | Generation record ID                                               |
| `charged_cents` | integer        | Amount deducted                                                    |
| `elapsed_ms`    | integer        | Render time                                                        |

## Example

```bash
curl -X POST https://substance-api.com/api/v1/frontier/omni-flash \
  -H "Authorization: Bearer sk_live_..." \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "Slow dolly through a neon-lit Tokyo alley in the rain, reflections on wet asphalt",
    "aspect_ratio": "16:9"
  }'
```

## Errors

| Status | Meaning                                                                                                     |
| ------ | ----------------------------------------------------------------------------------------------------------- |
| `400`  | Missing `prompt`, or an `aspect_ratio` other than `16:9` / `9:16`                                           |
| `402`  | Balance below the call price                                                                                |
| `403`  | Your account doesn't have the `video` product enabled                                                       |
| `502`  | Gemini failed, refused the prompt, or returned no video. The charge is refunded — `refunded_cents` included |
| `503`  | The pipeline is disabled                                                                                    |

## Pricing

$2.49 per clip. Omni Flash bills per output second upstream and the model picks the length, so this rate covers a full 10-second worst case. Bills on `images.img2video.omniflash`. See [Credits & pricing](/vdocs/account/credits.md).

SFW only — Gemini enforces its own safety filter.


---

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