---
title: AssemblyAI Universal-3 Pro
description: AssemblyAI's Universal 3 Pro speech recognition model for high-accuracy transcription.
image: https://edgetunnel-b2h.pages.dev/dev-products-preview.png
---

> Documentation Index  
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![AssemblyAI logo](https://edgetunnel-b2h.pages.dev/_astro/assemblyai.DKrad3Z3.svg) 

#  AssemblyAI Universal-3 Pro 

Automatic Speech Recognition • AssemblyAI 

`assemblyai/universal-3-pro` 

AssemblyAI's Universal 3 Pro speech recognition model for high-accuracy transcription.

| Model Info          |                                                                                                                              |
| ------------------- | ---------------------------------------------------------------------------------------------------------------------------- |
| Terms and License   | [link ↗](https://www.assemblyai.com/legal/terms-of-service)                                                                  |
| More information    | [link ↗](https://www.assemblyai.com/)                                                                                        |
| Zero data retention | Yes                                                                                                                          |
| Pricing             | [View pricing in the Cloudflare dashboard ↗](https://dash.cloudflare.com/?to=/:account/ai/models/assemblyai/universal-3-pro) |

## Usage

* [ TypeScript ](#tab-panel-360)
* [ cURL ](#tab-panel-361)

**TypeScript**

```ts
const response = await env.AI.run(
  'assemblyai/universal-3-pro',
  { audio_url: 'https://cdn.openai.com/API/docs/audio/alloy.wav' },
)
console.log(response)
```

```bash
curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \
  --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "assemblyai/universal-3-pro",
  "input": {
    "audio_url": "https://cdn.openai.com/API/docs/audio/alloy.wav"
  }
}'
```

* [ Output ](#tab-panel-368)
* [ Raw response ](#tab-panel-369)

The sun rises in the east and sets in the west. This simple fact has been observed by humans for thousands of years.

```json
{
  "gatewayMetadata": {
    "keySource": "Unified"
  },
  "result": {
    "confidence": 0.99276465,
    "language_code": "en",
    "language_confidence": 0.9998,
    "text": "The sun rises in the east and sets in the west. This simple fact has been observed by humans for thousands of years.",
    "utterances": null,
    "words": [
      {
        "confidence": 0.9713957,
        "end": 129,
        "speaker": null,
        "start": 32,
        "text": "The"
      },
      {
        "confidence": 0.97053415,
        "end": 404,
        "speaker": null,
        "start": 129,
        "text": "sun"
      },
      {
        "confidence": 0.9998932,
        "end": 809,
        "speaker": null,
        "start": 420,
        "text": "rises"
      },
      {
        "confidence": 0.999092,
        "end": 922,
        "speaker": null,
        "start": 841,
        "text": "in"
      },
      {
        "confidence": 0.9997658,
        "end": 1068,
        "speaker": null,
        "start": 922,
        "text": "the"
      },
      {
        "confidence": 0.9684294,
        "end": 1456,
        "speaker": null,
        "start": 1149,
        "text": "east"
      },
      {
        "confidence": 0.9894344,
        "end": 1634,
        "speaker": null,
        "start": 1570,
        "text": "and"
      },
      {
        "confidence": 0.9999058,
        "end": 2055,
        "speaker": null,
        "start": 1715,
        "text": "sets"
      },
      {
        "confidence": 0.9997663,
        "end": 2104,
        "speaker": null,
        "start": 2055,
        "text": "in"
      },
      {
        "confidence": 0.9999552,
        "end": 2217,
        "speaker": null,
        "start": 2120,
        "text": "the"
      },
      {
        "confidence": 0.9913442,
        "end": 2638,
        "speaker": null,
        "start": 2217,
        "text": "west."
      },
      {
        "confidence": 0.9974367,
        "end": 3221,
        "speaker": null,
        "start": 3107,
        "text": "This"
      },
      {
        "confidence": 0.99965656,
        "end": 3560,
        "speaker": null,
        "start": 3269,
        "text": "simple"
      },
      {
        "confidence": 0.999713,
        "end": 3997,
        "speaker": null,
        "start": 3593,
        "text": "fact"
      },
      {
        "confidence": 0.99924207,
        "end": 4175,
        "speaker": null,
        "start": 3997,
        "text": "has"
      },
      {
        "confidence": 0.9995851,
        "end": 4289,
        "speaker": null,
        "start": 4224,
        "text": "been"
      },
      {
        "confidence": 0.9984724,
        "end": 4807,
        "speaker": null,
        "start": 4337,
        "text": "observed"
      },
      {
        "confidence": 0.9997143,
        "end": 4952,
        "speaker": null,
        "start": 4807,
        "text": "by"
      },
      {
        "confidence": 0.9997894,
        "end": 5422,
        "speaker": null,
        "start": 4969,
        "text": "humans"
      },
      {
        "confidence": 0.99947494,
        "end": 5519,
        "speaker": null,
        "start": 5422,
        "text": "for"
      },
      {
        "confidence": 0.99950385,
        "end": 6118,
        "speaker": null,
        "start": 5616,
        "text": "thousands"
      },
      {
        "confidence": 0.9995235,
        "end": 6231,
        "speaker": null,
        "start": 6118,
        "text": "of"
      },
      {
        "confidence": 0.9519594,
        "end": 6636,
        "speaker": null,
        "start": 6328,
        "text": "years."
      }
    ]
  },
  "state": "Completed"
}
```

## Examples

**With Language Code**  — Transcribe with an explicit language code 

* [ TypeScript ](#tab-panel-362)
* [ cURL ](#tab-panel-363)

**TypeScript**

```ts
const response = await env.AI.run(
  'assemblyai/universal-3-pro',
  { audio_url: 'https://cdn.openai.com/API/docs/audio/echo.wav', language_code: 'en' },
)
console.log(response)
```

```bash
curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \
  --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "assemblyai/universal-3-pro",
  "input": {
    "audio_url": "https://cdn.openai.com/API/docs/audio/echo.wav",
    "language_code": "en"
  }
}'
```

* [ Output ](#tab-panel-372)
* [ Raw response ](#tab-panel-373)

In the heart of the city, there is a large park where people go to relax and enjoy nature. The park has a beautiful pond with ducks and swans.

```json
{
  "gatewayMetadata": {
    "keySource": "Unified"
  },
  "result": {
    "confidence": 0.9927905,
    "language_code": "en_us",
    "language_confidence": null,
    "text": "In the heart of the city, there is a large park where people go to relax and enjoy nature. The park has a beautiful pond with ducks and swans.",
    "utterances": null,
    "words": [
      {
        "confidence": 0.88134426,
        "end": 80,
        "speaker": null,
        "start": 32,
        "text": "In"
      },
      {
        "confidence": 0.9984907,
        "end": 241,
        "speaker": null,
        "start": 177,
        "text": "the"
      },
      {
        "confidence": 0.99956447,
        "end": 500,
        "speaker": null,
        "start": 258,
        "text": "heart"
      },
      {
        "confidence": 0.9995684,
        "end": 548,
        "speaker": null,
        "start": 500,
        "text": "of"
      },
      {
        "confidence": 0.99977916,
        "end": 677,
        "speaker": null,
        "start": 596,
        "text": "the"
      },
      {
        "confidence": 0.9956655,
        "end": 967,
        "speaker": null,
        "start": 677,
        "text": "city,"
      },
      {
        "confidence": 0.9987048,
        "end": 1435,
        "speaker": null,
        "start": 1322,
        "text": "there"
      },
      {
        "confidence": 0.99971443,
        "end": 1516,
        "speaker": null,
        "start": 1467,
        "text": "is"
      },
      {
        "confidence": 0.99948585,
        "end": 1596,
        "speaker": null,
        "start": 1564,
        "text": "a"
      },
      {
        "confidence": 0.9987669,
        "end": 2016,
        "speaker": null,
        "start": 1709,
        "text": "large"
      },
      {
        "confidence": 0.9981509,
        "end": 2467,
        "speaker": null,
        "start": 2129,
        "text": "park"
      },
      {
        "confidence": 0.9559358,
        "end": 2838,
        "speaker": null,
        "start": 2693,
        "text": "where"
      },
      {
        "confidence": 0.99979085,
        "end": 3145,
        "speaker": null,
        "start": 2854,
        "text": "people"
      },
      {
        "confidence": 0.9993555,
        "end": 3338,
        "speaker": null,
        "start": 3177,
        "text": "go"
      },
      {
        "confidence": 0.9998317,
        "end": 3467,
        "speaker": null,
        "start": 3338,
        "text": "to"
      },
      {
        "confidence": 0.99991953,
        "end": 4064,
        "speaker": null,
        "start": 3500,
        "text": "relax"
      },
      {
        "confidence": 0.9988979,
        "end": 4161,
        "speaker": null,
        "start": 4064,
        "text": "and"
      },
      {
        "confidence": 0.9999237,
        "end": 4484,
        "speaker": null,
        "start": 4161,
        "text": "enjoy"
      },
      {
        "confidence": 0.998528,
        "end": 4887,
        "speaker": null,
        "start": 4484,
        "text": "nature."
      },
      {
        "confidence": 0.990198,
        "end": 5758,
        "speaker": null,
        "start": 5597,
        "text": "The"
      },
      {
        "confidence": 0.99979144,
        "end": 6016,
        "speaker": null,
        "start": 5758,
        "text": "park"
      },
      {
        "confidence": 0.99926263,
        "end": 6177,
        "speaker": null,
        "start": 6064,
        "text": "has"
      },
      {
        "confidence": 0.9992211,
        "end": 6242,
        "speaker": null,
        "start": 6177,
        "text": "a"
      },
      {
        "confidence": 0.99989605,
        "end": 6774,
        "speaker": null,
        "start": 6322,
        "text": "beautiful"
      },
      {
        "confidence": 0.9998628,
        "end": 7193,
        "speaker": null,
        "start": 6790,
        "text": "pond"
      },
      {
        "confidence": 0.99960047,
        "end": 7355,
        "speaker": null,
        "start": 7193,
        "text": "with"
      },
      {
        "confidence": 0.99963534,
        "end": 7806,
        "speaker": null,
        "start": 7371,
        "text": "ducks"
      },
      {
        "confidence": 0.99866796,
        "end": 7919,
        "speaker": null,
        "start": 7855,
        "text": "and"
      },
      {
        "confidence": 0.9833702,
        "end": 8629,
        "speaker": null,
        "start": 7935,
        "text": "swans."
      }
    ]
  },
  "state": "Completed"
}
```

**With Key Terms**  — Improve accuracy for domain-specific vocabulary 

* [ TypeScript ](#tab-panel-366)
* [ cURL ](#tab-panel-367)

**TypeScript**

```ts
const response = await env.AI.run(
  'assemblyai/universal-3-pro',
  {
    audio_url: 'https://cdn.openai.com/API/docs/audio/nova.wav',
    keyterms_prompt: ['Kubernetes', 'microservices', 'containerization', 'load balancer'],
  },
)
console.log(response)
```

```bash
curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \
  --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "assemblyai/universal-3-pro",
  "input": {
    "audio_url": "https://cdn.openai.com/API/docs/audio/nova.wav",
    "keyterms_prompt": [
      "Kubernetes",
      "microservices",
      "containerization",
      "load balancer"
    ]
  }
}'
```

* [ Output ](#tab-panel-374)
* [ Raw response ](#tab-panel-375)

In the kitchen, the aroma of freshly baked bread filled the air. The loaves were golden brown and crusty on the outside and soft and warm on the inside.

```json
{
  "gatewayMetadata": {
    "keySource": "Unified"
  },
  "result": {
    "confidence": 0.9901139,
    "language_code": "en",
    "language_confidence": 0.9969,
    "text": "In the kitchen, the aroma of freshly baked bread filled the air. The loaves were golden brown and crusty on the outside and soft and warm on the inside.",
    "utterances": null,
    "words": [
      {
        "confidence": 0.9785539,
        "end": 80,
        "speaker": null,
        "start": 32,
        "text": "In"
      },
      {
        "confidence": 0.99962807,
        "end": 242,
        "speaker": null,
        "start": 177,
        "text": "the"
      },
      {
        "confidence": 0.99617165,
        "end": 565,
        "speaker": null,
        "start": 258,
        "text": "kitchen,"
      },
      {
        "confidence": 0.9991928,
        "end": 839,
        "speaker": null,
        "start": 743,
        "text": "the"
      },
      {
        "confidence": 0.99992657,
        "end": 1292,
        "speaker": null,
        "start": 839,
        "text": "aroma"
      },
      {
        "confidence": 0.99955577,
        "end": 1405,
        "speaker": null,
        "start": 1308,
        "text": "of"
      },
      {
        "confidence": 0.9996594,
        "end": 1889,
        "speaker": null,
        "start": 1405,
        "text": "freshly"
      },
      {
        "confidence": 0.99850214,
        "end": 2261,
        "speaker": null,
        "start": 1970,
        "text": "baked"
      },
      {
        "confidence": 0.9999217,
        "end": 2584,
        "speaker": null,
        "start": 2293,
        "text": "bread"
      },
      {
        "confidence": 0.9999,
        "end": 2859,
        "speaker": null,
        "start": 2600,
        "text": "filled"
      },
      {
        "confidence": 0.99993885,
        "end": 3004,
        "speaker": null,
        "start": 2859,
        "text": "the"
      },
      {
        "confidence": 0.9961201,
        "end": 3262,
        "speaker": null,
        "start": 3020,
        "text": "air."
      },
      {
        "confidence": 0.99501073,
        "end": 4119,
        "speaker": null,
        "start": 4054,
        "text": "The"
      },
      {
        "confidence": 0.9997483,
        "end": 4522,
        "speaker": null,
        "start": 4215,
        "text": "loaves"
      },
      {
        "confidence": 0.9998282,
        "end": 4781,
        "speaker": null,
        "start": 4619,
        "text": "were"
      },
      {
        "confidence": 0.99248224,
        "end": 5249,
        "speaker": null,
        "start": 4878,
        "text": "golden"
      },
      {
        "confidence": 0.9700398,
        "end": 5718,
        "speaker": null,
        "start": 5362,
        "text": "brown"
      },
      {
        "confidence": 0.9419883,
        "end": 5992,
        "speaker": null,
        "start": 5928,
        "text": "and"
      },
      {
        "confidence": 0.9994146,
        "end": 6541,
        "speaker": null,
        "start": 6089,
        "text": "crusty"
      },
      {
        "confidence": 0.9997141,
        "end": 6703,
        "speaker": null,
        "start": 6574,
        "text": "on"
      },
      {
        "confidence": 0.9999218,
        "end": 6784,
        "speaker": null,
        "start": 6719,
        "text": "the"
      },
      {
        "confidence": 0.9993179,
        "end": 7365,
        "speaker": null,
        "start": 6881,
        "text": "outside"
      },
      {
        "confidence": 0.8661144,
        "end": 7462,
        "speaker": null,
        "start": 7365,
        "text": "and"
      },
      {
        "confidence": 0.9996922,
        "end": 7882,
        "speaker": null,
        "start": 7462,
        "text": "soft"
      },
      {
        "confidence": 0.9998481,
        "end": 7995,
        "speaker": null,
        "start": 7882,
        "text": "and"
      },
      {
        "confidence": 0.99996424,
        "end": 8270,
        "speaker": null,
        "start": 8028,
        "text": "warm"
      },
      {
        "confidence": 0.9998791,
        "end": 8399,
        "speaker": null,
        "start": 8270,
        "text": "on"
      },
      {
        "confidence": 0.99982506,
        "end": 8512,
        "speaker": null,
        "start": 8415,
        "text": "the"
      },
      {
        "confidence": 0.9834439,
        "end": 8964,
        "speaker": null,
        "start": 8512,
        "text": "inside."
      }
    ]
  },
  "state": "Completed"
}
```

**Speaker Diarization**  — Identify different speakers in the audio 

* [ TypeScript ](#tab-panel-364)
* [ cURL ](#tab-panel-365)

**TypeScript**

```ts
const response = await env.AI.run(
  'assemblyai/universal-3-pro',
  { audio_url: 'https://cdn.openai.com/API/docs/audio/onyx.wav', speaker_labels: true },
)
console.log(response)
```

```bash
curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \
  --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "assemblyai/universal-3-pro",
  "input": {
    "audio_url": "https://cdn.openai.com/API/docs/audio/onyx.wav",
    "speaker_labels": true
  }
}'
```

* [ Output ](#tab-panel-370)
* [ Raw response ](#tab-panel-371)

The train chugged along the tracks, carrying passengers to their destinations. The rhythmic sound of the wheels on the rails was soothing.

```json
{
  "gatewayMetadata": {
    "keySource": "Unified"
  },
  "result": {
    "confidence": 0.99781793,
    "language_code": "en",
    "language_confidence": 0.9906,
    "text": "The train chugged along the tracks, carrying passengers to their destinations. The rhythmic sound of the wheels on the rails was soothing.",
    "utterances": [
      {
        "confidence": 0.99781793,
        "end": 7719,
        "speaker": "A",
        "start": 32,
        "text": "The train chugged along the tracks, carrying passengers to their destinations. The rhythmic sound of the wheels on the rails was soothing."
      }
    ],
    "words": [
      {
        "confidence": 0.9742124,
        "end": 113,
        "speaker": "A",
        "start": 32,
        "text": "The"
      },
      {
        "confidence": 0.99997795,
        "end": 403,
        "speaker": "A",
        "start": 177,
        "text": "train"
      },
      {
        "confidence": 0.99713653,
        "end": 904,
        "speaker": "A",
        "start": 516,
        "text": "chugged"
      },
      {
        "confidence": 0.9999881,
        "end": 1130,
        "speaker": "A",
        "start": 904,
        "text": "along"
      },
      {
        "confidence": 0.9999676,
        "end": 1308,
        "speaker": "A",
        "start": 1227,
        "text": "the"
      },
      {
        "confidence": 0.9995983,
        "end": 1808,
        "speaker": "A",
        "start": 1308,
        "text": "tracks,"
      },
      {
        "confidence": 0.9998933,
        "end": 2341,
        "speaker": "A",
        "start": 2131,
        "text": "carrying"
      },
      {
        "confidence": 0.999992,
        "end": 3068,
        "speaker": "A",
        "start": 2454,
        "text": "passengers"
      },
      {
        "confidence": 0.99999034,
        "end": 3229,
        "speaker": "A",
        "start": 3100,
        "text": "to"
      },
      {
        "confidence": 0.9999908,
        "end": 3423,
        "speaker": "A",
        "start": 3262,
        "text": "their"
      },
      {
        "confidence": 0.9992286,
        "end": 4198,
        "speaker": "A",
        "start": 3423,
        "text": "destinations."
      },
      {
        "confidence": 0.99871373,
        "end": 5119,
        "speaker": "A",
        "start": 5038,
        "text": "The"
      },
      {
        "confidence": 0.9999517,
        "end": 5523,
        "speaker": "A",
        "start": 5184,
        "text": "rhythmic"
      },
      {
        "confidence": 0.99993813,
        "end": 5926,
        "speaker": "A",
        "start": 5523,
        "text": "sound"
      },
      {
        "confidence": 0.99991894,
        "end": 6007,
        "speaker": "A",
        "start": 5926,
        "text": "of"
      },
      {
        "confidence": 0.99993825,
        "end": 6088,
        "speaker": "A",
        "start": 6007,
        "text": "the"
      },
      {
        "confidence": 0.99995935,
        "end": 6459,
        "speaker": "A",
        "start": 6169,
        "text": "wheels"
      },
      {
        "confidence": 0.99997675,
        "end": 6605,
        "speaker": "A",
        "start": 6556,
        "text": "on"
      },
      {
        "confidence": 0.99999475,
        "end": 6718,
        "speaker": "A",
        "start": 6637,
        "text": "the"
      },
      {
        "confidence": 0.9999932,
        "end": 7105,
        "speaker": "A",
        "start": 6718,
        "text": "rails"
      },
      {
        "confidence": 0.999851,
        "end": 7299,
        "speaker": "A",
        "start": 7138,
        "text": "was"
      },
      {
        "confidence": 0.98378325,
        "end": 7719,
        "speaker": "A",
        "start": 7299,
        "text": "soothing."
      }
    ]
  },
  "state": "Completed"
}
```

## Parameters

* [ Input ](#tab-panel-376)
* [ Output ](#tab-panel-377)

audio\_url

`string`The URL of the audio file to transcribe. Can be a publicly accessible URL or a data URI (data:audio/...;base64,...). For data URIs, the audio will be uploaded to AssemblyAI automatically. Required for pre-recorded transcription (when stream is false or not set).

websocket

`boolean`Enable real-time WebSocket streaming for live audio transcription. When true, a WebSocket connection is established instead of submitting a pre-recorded transcription job. Cannot be used with audio\_url.

language\_code

`string`The language code for the audio file (e.g., "en", "es", "fr"). Defaults to automatic language detection.

language\_detection

`boolean`Enable automatic language detection. When enabled with speech\_models, the system will automatically select the best model for the detected language.

prompt

`string`A custom prompt to guide transcription style, formatting, and output characteristics. Maximum 1,500 words.

▶keyterms\_prompt\[\]

`array`An array of up to 1,000 words or phrases (max 6 words per phrase) to improve transcription accuracy. Cannot be used with the prompt parameter.

temperature

`number`minimum: 0maximum: 1Controls randomness in model output (0.0-1.0). Lower values make output more deterministic. Default is 0.0.

speaker\_labels

`boolean`Enable speaker diarization to identify different speakers in the audio.

speakers\_expected

`integer`minimum: 1maximum: 9007199254740991Expected number of speakers for speaker diarization.

auto\_chapters

`boolean`Enable automatic chapter detection.

entity\_detection

`boolean`Enable detection of entities like names, organizations, and locations.

sentiment\_analysis

`boolean`Enable sentiment analysis for each sentence.

auto\_highlights

`boolean`Enable automatic extraction of key phrases and highlights.

content\_safety

`boolean`Enable content safety detection for sensitive content.

iab\_categories

`boolean`Enable IAB (Interactive Advertising Bureau) content taxonomy classification.

▶custom\_spelling\[\]

`array`Custom spelling rules to replace specific words or phrases in the transcription output.

disfluencies

`boolean`Include filler words like "um", "uh", etc. in the transcript.

multichannel

`boolean`Process each audio channel separately for multi-channel audio files.

dual\_channel

`boolean`Process audio as dual-channel (stereo) for better accuracy.

webhook\_url

`string`format: uriURL to receive webhook notifications when transcription is complete.

audio\_start\_from

`integer`minimum: 0maximum: 9007199254740991Timestamp (in milliseconds) to start transcription from.

audio\_end\_at

`integer`minimum: 0maximum: 9007199254740991Timestamp (in milliseconds) to end transcription at.

▶word\_boost\[\]

`array`Array of words to boost recognition accuracy (legacy - use keyterms\_prompt instead).

boost\_param

`string`enum: low, default, highHow much to boost the words in word\_boost.

filter\_profanity

`boolean`Filter profanity from the transcription.

redact\_pii

`boolean`Redact personally identifiable information.

redact\_pii\_audio

`boolean`Generate a redacted audio file with PII removed.

▶redact\_pii\_policies\[\]

`array`Specific PII policies to apply for redaction.

redact\_pii\_sub

`string`enum: entity\_name, hashStrategy for substituting redacted PII.

speech\_threshold

`number`minimum: 0maximum: 1Confidence threshold for speech detection.

domain

`string`enum: medical-v1Domain-specific transcription mode. "medical-v1" enables medical terminology optimization.

text

`string`The transcribed text.

words

`array | null`Word-level timestamps and confidence scores.

utterances

`array | null`Speaker-separated utterances (when speaker\_labels is enabled).

confidence

`number | null`Overall confidence score for the transcription.

language\_code

`string | null`Detected or specified language code.

language\_confidence

`number | null`Confidence score for language detection.

## API Schemas (Raw)

Input [ ](https://edgetunnel-b2h.pages.dev/ai/models/assemblyai/universal-3-pro/schema-input.json "Open") [ ](https://edgetunnel-b2h.pages.dev/ai/models/assemblyai/universal-3-pro/schema-input.json "Download") 

Output [ ](https://edgetunnel-b2h.pages.dev/ai/models/assemblyai/universal-3-pro/schema-output.json "Open") [ ](https://edgetunnel-b2h.pages.dev/ai/models/assemblyai/universal-3-pro/schema-output.json "Download")

```json
{"@context":"https://schema.org","@type":"TechArticle","@id":"https://edgetunnel-b2h.pages.dev/ai/models/assemblyai/universal-3-pro/#page","headline":"AssemblyAI Universal-3 Pro (AssemblyAI) · Cloudflare AI docs · Cloudflare AI docs","description":"AssemblyAI's Universal 3 Pro speech recognition model for high-accuracy transcription.","url":"https://edgetunnel-b2h.pages.dev/ai/models/assemblyai/universal-3-pro/","inLanguage":"en","image":"https://edgetunnel-b2h.pages.dev/dev-products-preview.png","publisher":{"@type":"Organization","name":"Cloudflare","url":"https://www.cloudflare.com/"},"isPartOf":{"@type":"WebSite","@id":"https://edgetunnel-b2h.pages.dev/#website","name":"Cloudflare Docs","url":"https://edgetunnel-b2h.pages.dev/"}}
{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/directory/","name":"Directory"}},{"@type":"ListItem","position":2,"item":{"@id":"/ai/","name":"AI"}},{"@type":"ListItem","position":3,"item":{"@id":"/ai/models/","name":"Models"}}]}
```