GPT-4o Transcribe API

About GPT-4o Transcribe

Turn a recorded technical interview into searchable text with language and vocabulary context.

Call it with the model name openai/gpt-4o-transcribe/speech-to-text on POST /jobs/createTask, from $0.0001.

Introduction

Turn a recorded technical interview into searchable text with language and vocabulary context.

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

Request parameters

Pricing

Prices are in USD. The API uses a separate USD balance. Website credits cannot be used or transferred to it, and API funds cannot be transferred to website credits. When a task is accepted, we reserve the maximum quoted amount from your API balance. On completion, we charge for actual usage, never more than the hold, and release the remainder. If the task fails, the hold is released.

Send the same request body to POST /jobs/quote to see the estimated and maximum USD charge before running. A quote does not run the task or charge your balance.

API quick start

Call the GPT-4o Transcribe API in three steps

1. Create an API key. Sign in to PopNow and create a key in the API console. Keys start with sk-popnow-. API calls use your separate USD balance.
2. Send the request. POST /jobs/createTask with model openai/gpt-4o-transcribe/speech-to-text and an input object that follows the parameter table. The response returns a task ID straight away.
3. Get the result. Poll GET /jobs/recordInfo with the task ID, or pass a callBackUrl and we post the result to it. Download the output links when the task succeeds.

# 1. Create the task. Keep the Idempotency-Key if you retry after a network error.
export IDEMPOTENCY_KEY="$(uuidgen)"
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: $IDEMPOTENCY_KEY" \
  -d '{
  "model": "openai/gpt-4o-transcribe/speech-to-text",
  "input": {
    "audio_url": "https://media.popnow.ai/shortfilm/voices/Aoede-46e4c427.mp3"
  }
}'

# 2. Copy data.taskId from the response, then poll until state is succeeded, failed, canceled or expired.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
  -H "Authorization: Bearer $POPNOW_API_KEY"

Replace the prompt and any links with your own. The API tab has the response, polling and callback reference.

GPT-4o Transcribe API questions

All GPT models

• GPT Live Transcribe APIGPT Live Transcribe emits text while audio arrives, with language hints, vocabulary context and adjustable transcript delay.From $0.00006 per second
• GPT Transcribe APITwo ways to transcribe speechFrom $0.00002 per second
• GPT-Realtime-2.1 APIGPT-Realtime-2.1 reasons over spoken requests, supports function tools and responds with streaming speech or text.
• GPT-Realtime-2.1 Mini APIGPT-Realtime-2.1 Mini pairs compact reasoning with streaming voice for short, responsive audio interactions.
• GPT-4o Transcribe Diarize APIIdentify who spoke in a recording and return time-aligned segments with speaker labels.From $0.0001 per second
• GPT-4o Mini Transcribe APIConvert a queue of recorded voice notes into individual text entries, billed by the length of each note.From $0.00005 per second
• GPT-4o Transcribe APITurn a recorded technical interview into searchable text with language and vocabulary context.From $0.0001 per second

Other audio APIs

• HeartMuLa Transcribe APILyrics pulled from sung vocals, in many languagesFrom $0.05 per run
• Grok STT APITranscripts with word timings in 25 languagesFrom $0.00004 per second
• Whisper 1 APIConvert a recording to text with word timings and longer segments for arranging subtitles.From $0.0001 per second

More about GPT-4o Transcribe

Try it

GPT-4o Transcribe AI Speech to Text onlineCreate audio with GPT-4o Transcribe in PopNow

Docs

GPT-4o Transcribe model ID and input schema in the API docsPopNow API quickstart: send your first requestWebhooks: get GPT-4o Transcribe results without polling