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Speech to text

Whisper

OpenAI's general-purpose speech recognition model. Upload a recording, get text back, pay per second of audio.

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WAV, FLAC, OGG, MP4/M4A, MP3 · Uploads up to 8 MiB

$0.0063Per minute

Pricing

Price

Per minute
$0.0063
Per hour
$0.38

Includes the MiniRouter fee. Tokens are not charged.

Estimate your cost

Priced per second of audio.

Uploads up to 8 MiB.

Estimated cost

$0.063

Includes the MiniRouter fee. Credit is held on an upper bound of the upload’s duration and released on settlement.

Estimate only; nothing is sent. Your charge settles to the provider’s reported seconds plus the MiniRouter fee.

Use the Transcription API

Set MINIROUTER_API_KEY to your inference key and copy the example.

Use a recording named recording.mp3, up to 8 MiB.

curl --fail-with-body --retry 0 --max-time 120 \
  https://api.minirouter.sh/v1/audio/transcriptions \
  -H "Authorization: Bearer $MINIROUTER_API_KEY" \
  -F 'file=@recording.mp3' \
  -F 'model=openai/whisper-1' \
  -F 'response_format=json'

Keep the request ID and check Request logs for the settled cost. A failed or disconnected request may still incur a cost; these examples disable automatic retries.

How it works

How it works

Endpoint
POST /v1/audio/transcriptions
Multipart file and model, or JSON with base64 audio and media_type.
Accepted media
wav, flac, ogg, mp4/m4a, mp3
Up to 8 MiB and 3,600 s per upload.
Response
json, text, verbose_json
verbose_json adds language, duration and segments.
Billing
Per second of audio
Settles to the duration the provider reports.
Transcription, fee included

Pay for the seconds you send.

Transcription is billed per second of audio and shown per minute. MAI-Transcribe 2 costs less at volume.
All voice models

Per minute

Whisper
$0.0063
MAI-Transcribe 2
$0.0018

Per hour of audio

Whisper
$0.38
MAI-Transcribe 2
$0.11
MiniRouter model catalog ↗, October 9, 2026; Vercel AI Gateway speech to text ↗. Prices include the MiniRouter fee.
View chart data
Transcription prices per minute and per hour of audio
ModelModel IDPer minutePer hour
Whisperopenai/whisper-1$0.0063$0.38
MAI-Transcribe 2microsoft/mai-transcribe-2$0.0018$0.11
Billing

Held by duration, settled by usage.

MiniRouter reads the duration from your file and reserves it before calling the provider.
Pricing and holds
  1. [ 01 ]

    Duration from the file

    The hold is the file's duration, rounded up to a second, times the per-second rate. Unreadable or WebM audio is rejected before any hold.

  2. [ 02 ]

    Settled to reported duration

    The charge follows the duration the provider reports. Anything left on the hold is released.

  3. [ 03 ]

    Visible in Request logs

    Rows show transcription_seconds with zero tokens. The CSV export carries the same column.

Every model, one key.

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