GPT-4o Transcribe Diarize API reference

Identify who spoke in a recording and return time-aligned segments with speaker labels.

Call GPT-4o Transcribe Diarize from your own code with one PopNow API key. Below are the exact model IDs to send, every input field the model accepts, what each request costs in USD, and a request you can paste into a terminal.

At a glance

Made by: OpenAI
Output: Audio
From: $0.0001 USD per second of output
Model IDs: openai/gpt-4o-transcribe-diarize/speech-to-text

Prices are in USD, charged to your separate API wallet. A task reserves the maximum possible charge when accepted and settles actual usage on completion; any remainder is released. Failed tasks are not charged. Call POST /api/v1/jobs/quote for an exact quote before running.

Speech to Text

openai/gpt-4o-transcribe-diarize/speech-to-text

Price

Option	USD
`Default`	$0.0001 per second of output

Parameters

Field	Type	Default	Allowed	What it does
`audio_url`Required	`string (uri)`	—	—	Recording to transcribe. Maximum file size is 25 MB and duration is two hours.
`language`Optional	`string`	—	aa, ab, ae, af, ak, am, an, ar, as, av, ay, az, ba, be, … (+170) · up to 2 characters	Two-letter spoken language code.
`temperature`Optional	`number`	—	0 to 1	Sampling temperature for recognizing the recording.

Example request

This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.

The example uses PopNow sample files in audio_url. Replace them with your own public HTTPS links, uploads or saved assets.

POST /api/v1/jobs/createTask

curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask" \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
  "model": "openai/gpt-4o-transcribe-diarize/speech-to-text",
  "input": {
    "audio_url": "https://media.popnow.ai/shortfilm/voices/Aoede-46e4c427.mp3"
  }
}'

The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.

GET /api/v1/jobs/recordInfo

curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
  -H "Authorization: Bearer $POPNOW_API_KEY"