GPT-4o Transcribe

Automatic Speech Recognition • OpenAI

openai/gpt-4o-transcribe

• Third-party
• Zero data retention

A speech-to-text model that uses GPT-4o to transcribe audio with improved word error rate and better language recognition compared to original Whisper models.

Usage

const response = await env.AI.run(
  'openai/gpt-4o-transcribe',
  { file: 'data:audio/wav;base64,<...>' },
)
console.log(response)

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": "openai/gpt-4o-transcribe",
  "input": {
    "file": "data:audio/wav;base64,<...>"
  }
}'

Hello

{
  "gatewayMetadata": {
    "keySource": "Unified"
  },
  "result": {
    "text": "Hello"
  },
  "state": "Completed"
}

Examples

<details>

<summary>With Language Hint — Transcribe with a language hint for better accuracy</summary>

const response = await env.AI.run(
  'openai/gpt-4o-transcribe',
  { file: 'data:audio/wav;base64,<...>', language: 'en' },
)
console.log(response)

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": "openai/gpt-4o-transcribe",
  "input": {
    "file": "data:audio/wav;base64,<...>",
    "language": "en"
  }
}'

Hello

{
  "gatewayMetadata": {
    "keySource": "Unified"
  },
  "result": {
    "text": "Hello"
  },
  "state": "Completed"
}

</details>

<details>

<summary>Guided Transcription — Use a prompt to guide transcription style and context</summary>

const response = await env.AI.run(
  'openai/gpt-4o-transcribe',
  {
    file: 'data:audio/wav;base64,<...>',
    prompt: 'This is a technical discussion about Kubernetes and cloud-native architecture.',
    language: 'en',
  },
)
console.log(response)

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": "openai/gpt-4o-transcribe",
  "input": {
    "file": "data:audio/wav;base64,<...>",
    "prompt": "This is a technical discussion about Kubernetes and cloud-native architecture.",
    "language": "en"
  }
}'

This is a technical discussion about Kubernetes and cloud-native architecture.

{
  "gatewayMetadata": {
    "keySource": "Unified"
  },
  "result": {
    "text": "This is a technical discussion about Kubernetes and cloud-native architecture."
  },
  "state": "Completed"
}

</details>

<details>

<summary>High Temperature — Higher temperature for more varied transcription</summary>

const response = await env.AI.run(
  'openai/gpt-4o-transcribe',
  { file: 'data:audio/wav;base64,<...>', temperature: 0.5 },
)
console.log(response)

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": "openai/gpt-4o-transcribe",
  "input": {
    "file": "data:audio/wav;base64,<...>",
    "temperature": 0.5
  }
}'

Hello, world!

{
  "gatewayMetadata": {
    "keySource": "Unified"
  },
  "result": {
    "text": "Hello, world!"
  },
  "state": "Completed"
}

</details>

Parameters

file

stringrequiredThe audio file as a data URI (data:audio/...;base64,...) or HTTPS URL. Supported formats: flac, mp3, mp4, mpeg, mpga, m4a, ogg, wav, webm.

language

stringThe language of the input audio. Supplying the input language in ISO-639-1 format will improve accuracy and latency.

prompt

stringAn optional text to guide the model's style or continue a previous audio segment. The prompt should match the audio language.

temperature

numberminimum: 0maximum: 1The sampling temperature, between 0 and 1. Higher values like 0.8 will make the output more random, while lower values like 0.2 will make it more focused and deterministic. Defaults to 0 if omitted.

text

stringThe transcribed text.

API Schemas (Raw)

Input Open Download

Output Open Download

Was this helpful?

YesNo

On this page

Docs

{"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/ai/models/openai/gpt-4o-transcribe/#page","headline":"GPT-4o Transcribe","description":"A speech-to-text model that uses GPT-4o to transcribe audio with improved word error rate and better language recognition compared to original Whisper models.","url":"https://developers.cloudflare.com/ai/models/openai/gpt-4o-transcribe/","inLanguage":"en","image":"https://developers.cloudflare.com/og-docs.png","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. Build, secure, and scale without managing infrastructure","url":"https://www.cloudflare.com/","sameAs":["https://github.com/cloudflare","https://www.linkedin.com/company/cloudflare","https://x.com/cloudflare"],"logo":{"@type":"ImageObject","url":"https://developers.cloudflare.com/logo.svg"},"address":{"@type":"PostalAddress","streetAddress":"101 Townsend St","addressLocality":"San Francisco","addressRegion":"CA","postalCode":"94107","addressCountry":"US"},"contactPoint":[{"@type":"ContactPoint","contactType":"Customer Support","url":"https://support.cloudflare.com/","availableLanguage":["English"]},{"@type":"ContactPoint","contactType":"Sales","url":"https://www.cloudflare.com/contact/","availableLanguage":["English"]}]},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}}

description: OpenAI's model excelling at coding, writing, and reasoning. title: GPT-5 image: https://developers.cloudflare.com/og-docs.png

Skip to content

Documentation Index
Fetch the complete documentation index at: https://developers.cloudflare.com/llms.txt
Use this file to discover all available pages before exploring further.