# Seedance 2.5 Flash Text to Video

> Dreamina Seedance 2.5 Flash is the fast tier of Seedance 2.5. It generates 4 to 30 second video with native audio from a text prompt at 480p or 720p.


## Overview

- **Endpoint**: `https://fal.run/bytedance/seedance-2.5/flash/text-to-video`
- **Model ID**: `bytedance/seedance-2.5/flash/text-to-video`
- **Category**: text-to-video
- **Kind**: inference
**Tags**: stylized, transform, lipsync



## Pricing

For 480p, your request will cost roughly **$0.1442** per second of generated video, and for 720p, you will be charged roughly **$0.3094** per second of generated video. Your request will cost **$0.014** per 1,000 tokens. The number of tokens is roughly given by (height of output video * width of output video * (input video duration + output video duration) * 24) / 1024.

For more details, see [fal.ai pricing](https://fal.ai/pricing).

## API Information

This model can be used via our HTTP API or more conveniently via our client libraries.
See the input and output schema below, as well as the usage examples.


### Input Schema

The API accepts the following input parameters:


- **`prompt`** (`string`, _required_):
  The text prompt used to generate the video
  - Examples: "An octopus finds a football in the ocean and excitedly calls its octopus friends to come and play. Cut scene to an octopus football game under the sea."

- **`resolution`** (`ResolutionEnum`, _optional_):
  Video resolution - 480p for faster generation, 720p for quality. Default value: `"720p"`
  - Default: `"720p"`
  - Options: `"480p"`, `"720p"`

- **`duration`** (`DurationEnum`, _optional_):
  Duration of the video in seconds. Supports 4 to 30 seconds, or auto to let the model decide based on the prompt. Default value: `"auto"`
  - Default: `"auto"`
  - Options: `"auto"`, `"4"`, `"5"`, `"6"`, `"7"`, `"8"`, `"9"`, `"10"`, `"11"`, `"12"`, `"13"`, `"14"`, `"15"`, `"16"`, `"17"`, `"18"`, `"19"`, `"20"`, `"21"`, `"22"`, `"23"`, `"24"`, `"25"`, `"26"`, `"27"`, `"28"`, `"29"`, `"30"`

- **`aspect_ratio`** (`AspectRatioEnum`, _optional_):
  The aspect ratio of the generated video. Use 16:9 for landscape, 9:16 for portrait/vertical, 1:1 for square, 21:9 for ultrawide cinematic, or auto to let the model decide. Default value: `"auto"`
  - Default: `"auto"`
  - Options: `"auto"`, `"21:9"`, `"16:9"`, `"4:3"`, `"1:1"`, `"3:4"`, `"9:16"`

- **`generate_audio`** (`boolean`, _optional_):
  Whether to generate synchronized audio for the video, including sound effects, ambient sounds, and lip-synced speech. The cost of video generation is the same regardless of whether audio is generated or not. Default value: `true`
  - Default: `true`

- **`bitrate_mode`** (`BitrateModeEnum`, _optional_):
  Output bitrate mode. 'high' requests a higher-quality, larger-file encode from the model; 'standard' uses the default bitrate. Default value: `"standard"`
  - Default: `"standard"`
  - Options: `"standard"`, `"high"`
  - Examples: "standard"

- **`codec`** (`CodecEnum`, _optional_):
  'auto' retains default video codec behaviour; 'H264' uses H.264; 'H265' uses H.265. Default value: `"auto"`
  - Default: `"auto"`
  - Options: `"auto"`, `"H264"`, `"H265"`
  - Examples: "auto", "H264", "H265"

- **`end_user_id`** (`string`, _optional_):
  The unique user ID of the end user.



**Required Parameters Example**:

```json
{
  "prompt": "An octopus finds a football in the ocean and excitedly calls its octopus friends to come and play. Cut scene to an octopus football game under the sea."
}
```

**Full Example**:

```json
{
  "prompt": "An octopus finds a football in the ocean and excitedly calls its octopus friends to come and play. Cut scene to an octopus football game under the sea.",
  "resolution": "720p",
  "duration": "auto",
  "aspect_ratio": "auto",
  "generate_audio": true,
  "bitrate_mode": "standard",
  "codec": "auto"
}
```


### Output Schema

The API returns the following output format:

- **`video`** (`File`, _required_):
  The generated video file.
  - Examples: {"url":"https://storage.googleapis.com/falserverless/example_outputs/bytedance/seedance_2/output.mp4"}

- **`seed`** (`integer`, _required_):
  The seed used for generation.
  - Examples: 42

- **`draft_id`** (`string`, _optional_):
  The draft ID, or null when draft mode is disabled. Complete this draft within 14 days (7 days for US drafts) using the same account.



**Example Response**:

```json
{
  "video": {
    "url": "https://storage.googleapis.com/falserverless/example_outputs/bytedance/seedance_2/output.mp4"
  },
  "seed": 42
}
```


## Usage Examples

### cURL

```bash
curl --request POST \
  --url https://fal.run/bytedance/seedance-2.5/flash/text-to-video \
  --header "Authorization: Key $FAL_KEY" \
  --header "Content-Type: application/json" \
  --data '{
     "prompt": "An octopus finds a football in the ocean and excitedly calls its octopus friends to come and play. Cut scene to an octopus football game under the sea."
   }'
```

### Python

Ensure you have the Python client installed:

```bash
pip install fal-client
```

Then use the API client to make requests:

```python
import fal_client

def on_queue_update(update):
    if isinstance(update, fal_client.InProgress):
        for log in update.logs:
           print(log["message"])

result = fal_client.subscribe(
    "bytedance/seedance-2.5/flash/text-to-video",
    arguments={
        "prompt": "An octopus finds a football in the ocean and excitedly calls its octopus friends to come and play. Cut scene to an octopus football game under the sea."
    },
    with_logs=True,
    on_queue_update=on_queue_update,
)
print(result)
```

### JavaScript

Ensure you have the JavaScript client installed:

```bash
npm install --save @fal-ai/client
```

Then use the API client to make requests:

```javascript
import { fal } from "@fal-ai/client";

const result = await fal.subscribe("bytedance/seedance-2.5/flash/text-to-video", {
  input: {
    prompt: "An octopus finds a football in the ocean and excitedly calls its octopus friends to come and play. Cut scene to an octopus football game under the sea."
  },
  logs: true,
  onQueueUpdate: (update) => {
    if (update.status === "IN_PROGRESS") {
      update.logs.map((log) => log.message).forEach(console.log);
    }
  },
});
console.log(result.data);
console.log(result.requestId);
```


## Deploy your own model

To run your own weights, a fine-tune or a custom pipeline on the GPUs that serve this API, deploy it on fal Serverless. GPUs from H100 (80GB) to B300 (288GB), billed per second; an H100 is $4.50/h list, as low as $2.49/h. Prices, GPU specs and deploy steps: [fal Serverless](https://fal.ai/serverless.md).

## Additional Resources

### Documentation

- [Model Playground](https://fal.ai/models/bytedance/seedance-2.5/flash/text-to-video)
- [API Documentation](https://fal.ai/models/bytedance/seedance-2.5/flash/text-to-video/api)
- [OpenAPI Schema](https://fal.ai/api/openapi/queue/openapi.json?endpoint_id=bytedance/seedance-2.5/flash/text-to-video)

### fal.ai Platform

- [Platform Documentation](https://fal.ai/docs/documentation)
- [Python Client](https://fal.ai/docs/api-reference/client-libraries/python)
- [JavaScript Client](https://fal.ai/docs/api-reference/client-libraries/javascript)

### Other agent-readable surfaces

This file covers one model. To find anything else:

- [Platform overview](https://fal.ai/llms.txt): Entry points and representative endpoint IDs
- [Documentation index](https://fal.ai/docs/llms.txt): Every documentation page
- [Full documentation text](https://fal.ai/docs/llms-full.txt): The whole documentation inlined
- [Pricing](https://fal.ai/pricing.md): Model API and Serverless GPU prices
- [fal Serverless](https://fal.ai/serverless.md): Deploy your own models: GPU prices, specs and steps
- Any other model: `https://fal.ai/models/<endpoint-id>/llms.txt`