# Rev.ai Provider

The [Rev.ai](https://www.rev.ai/) provider contains language model support for the Rev.ai transcription API.

## Setup

The Rev.ai provider is available in the `@ai-sdk/revai` module. You can install it with

<Tabs items={['pnpm', 'npm', 'yarn', 'bun']}>
  <Tab>
    <Snippet text="pnpm add @ai-sdk/revai" dark />
  </Tab>
  <Tab>
    <Snippet text="npm install @ai-sdk/revai" dark />
  </Tab>
  <Tab>
    <Snippet text="yarn add @ai-sdk/revai" dark />
  </Tab>

  <Tab>
    <Snippet text="bun add @ai-sdk/revai" dark />
  </Tab>
</Tabs>

## Provider Instance

You can import the default provider instance `revai` from `@ai-sdk/revai`:

```ts
import { revai } from '@ai-sdk/revai';
```

If you need a customized setup, you can import `createRevai` from `@ai-sdk/revai` and create a provider instance with your settings:

```ts
import { createRevai } from '@ai-sdk/revai';

const revai = createRevai({
  // custom settings, e.g.
  fetch: customFetch,
});
```

You can use the following optional settings to customize the Rev.ai provider instance:

- **apiKey** _string_

  API key that is being sent using the `Authorization` header.
  It defaults to the `REVAI_API_KEY` environment variable.

- **headers** _Record&lt;string,string&gt;_

  Custom headers to include in the requests.

- **fetch** _(input: RequestInfo, init?: RequestInit) => Promise&lt;Response&gt;_

  Custom [fetch](https://developer.mozilla.org/en-US/docs/Web/API/fetch) implementation.
  Defaults to the global `fetch` function.
  You can use it as a middleware to intercept requests,
  or to provide a custom fetch implementation for e.g. testing.

## Transcription Models

You can create models that call the [Rev.ai transcription API](https://www.rev.ai/docs/api/transcription)
using the `.transcription()` factory method.

The first argument is the model id e.g. `machine`.

```ts
const model = revai.transcription('machine');
```

You can also pass additional provider-specific options using the `providerOptions` argument. For example, supplying the input language in ISO-639-1 (e.g. `en`) format can sometimes improve transcription performance if known beforehand.

```ts highlight="6"
import { experimental_transcribe as transcribe } from 'ai';
import { revai } from '@ai-sdk/revai';
import { readFile } from 'fs/promises';

const result = await transcribe({
  model: revai.transcription('machine'),
  audio: await readFile('audio.mp3'),
  providerOptions: { revai: { language: 'en' } },
});
```

The following provider options are available:

- **metadata** _string_

  Optional metadata that was provided during job submission.

- **notification_config** _object_

  Optional configuration for a callback url to invoke when processing is complete.

  - **url** _string_ - Callback url to invoke when processing is complete.
  - **auth_headers** _object_ - Optional authorization headers, if needed to invoke the callback.
    - **Authorization** _string_ - Authorization header value.

- **delete_after_seconds** _integer_

  Amount of time after job completion when job is auto-deleted.

- **verbatim** _boolean_

  Configures the transcriber to transcribe every syllable, including all false starts and disfluencies.

- **rush** _boolean_

  [HIPAA Unsupported] Only available for human transcriber option. When set to true, your job is given higher priority.

- **skip_diarization** _boolean_

  Specify if speaker diarization will be skipped by the speech engine.

- **skip_postprocessing** _boolean_

  Only available for English and Spanish languages. User-supplied preference on whether to skip post-processing operations.

- **skip_punctuation** _boolean_

  Specify if "punct" type elements will be skipped by the speech engine.

- **remove_disfluencies** _boolean_

  When set to true, disfluencies (like 'ums' and 'uhs') will not appear in the transcript.

- **remove_atmospherics** _boolean_

  When set to true, atmospherics (like `<laugh>`, `<affirmative>`) will not appear in the transcript.

- **filter_profanity** _boolean_

  When enabled, profanities will be filtered by replacing characters with asterisks except for the first and last.

- **speaker_channels_count** _integer_

  Only available for English, Spanish and French languages. Specify the total number of unique speaker channels in the audio.

- **speakers_count** _integer_

  Only available for English, Spanish and French languages. Specify the total number of unique speakers in the audio.

- **diarization_type** _string_

  Specify diarization type. Possible values: "standard" (default), "premium".

- **custom_vocabulary_id** _string_

  Supply the id of a pre-completed custom vocabulary submitted through the Custom Vocabularies API.

- **custom_vocabularies** _Array_

  Specify a collection of custom vocabulary to be used for this job.

- **strict_custom_vocabulary** _boolean_

  If true, only exact phrases will be used as custom vocabulary.

- **summarization_config** _object_

  Specify summarization options.

  - **model** _string_ - Model type for summarization. Possible values: "standard" (default), "premium".
  - **type** _string_ - Summarization formatting type. Possible values: "paragraph" (default), "bullets".
  - **prompt** _string_ - Custom prompt for flexible summaries (mutually exclusive with type).

- **translation_config** _object_

  Specify translation options.

  - **target_languages** _Array_ - Array of target languages for translation.
  - **model** _string_ - Model type for translation. Possible values: "standard" (default), "premium".

- **language** _string_

  Language is provided as a ISO 639-1 language code. Default is "en".

- **forced_alignment** _boolean_

  When enabled, provides improved accuracy for per-word timestamps for a transcript.
  Default is `false`.

  Currently supported languages:

  - English (en, en-us, en-gb)
  - French (fr)
  - Italian (it)
  - German (de)
  - Spanish (es)

  Note: This option is not available in low-cost environment.

### Model Capabilities

| Model      | Transcription       | Duration            | Segments            | Language            |
| ---------- | ------------------- | ------------------- | ------------------- | ------------------- |
| `machine`  | <Check size={18} /> | <Check size={18} /> | <Check size={18} /> | <Check size={18} /> |
| `low_cost` | <Check size={18} /> | <Check size={18} /> | <Check size={18} /> | <Check size={18} /> |
| `fusion`   | <Check size={18} /> | <Check size={18} /> | <Check size={18} /> | <Check size={18} /> |


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