API pricing
Transparent, usage-based pricing for the all-in-one audio API. One wallet, every capability — credits never expire and a failed job is never charged.
The wedge
The fairest economics in audio AI — designed so experimenting costs nothing and production stays predictable.
Create a key and get $1 of free API credit on your first key. Build before you pay.
Every job is prepaid and refunded automatically if processing fails. You only pay for output.
Top up your API wallet once; the balance carries forever. No monthly reset, no use-it-or-lose-it.
Speech, transcription, music, stems, voices and more — billed from a single wallet, no per-product contracts.
Rates
Audio is billed per minute processed; speech per 1,000 characters of text. Deducted from your prepaid API wallet. No tiers to decode, no seats, no minimums.
| Capability | Rate | At scale | Per $1 |
|---|---|---|---|
| Speech to Text | $0.01/min | $0.60 / hr | 100 min |
| Text to Speech | $0.05 / 1K chars | $50.00 / 1M chars | 20,000 chars |
| Music Generation | $0.04/min | $2.40 / hr | 25 min |
| Voice Cloning | $0.05 / 1K chars | $50.00 / 1M chars | 20,000 chars |
| Audiobook Narration | $0.09 / 1K chars | $90.00 / 1M chars | 11,111 chars |
| Stem Separation — core outputs | $0.10/min | $6.00 / hr | 10 min |
| Speaker Separation | $0.20/min | $12.00 / hr | 5 min |
| Voice Conversion | $0.13/min | $7.80 / hr | 7.7 min |
| Speech Translation | $0.40/min | $24.00 / hr | 2.5 min |
| Media Conversion | $0.01/min | $0.60 / hr | 100 min |
| Stems — Lead & backing vocals | $0.15/min | $9.00 / hr | 6.7 min |
| Stems — Male & female vocals | $0.15/min | $9.00 / hr | 6.7 min |
| Stems — each other specialist group | $0.20/min | $12.00 / hr | 5 min |
OpenAI-compatible /v1/audio/speech, /transcriptions and /translations bill at the Text to Speech and Speech to Text rates above.
Calculator
Enter the minutes of audio, or the words of text for speech, you expect per month. Live rates, no signup.
Stem prices add by output group. Enter the same source minutes for each group you need. One or both outputs in a vocal pair share its price; lead + rhythm guitar share one specialist group. Studio credits and the developer API wallet are separate. API rates are in USD, not a conversion of Studio credits.
Enter the minutes of audio you expect to process per month, and the text you expect to turn into speech.
Speech to Text
$0.01/min
Text to Speech
$0.05 / 1K chars
Music Generation
$0.04/min
Voice Cloning
$0.05 / 1K chars
Audiobook Narration
$0.09 / 1K chars
Stem Separation — core outputs
$0.10/min
Speaker Separation
$0.20/min
Voice Conversion
$0.13/min
Speech Translation
$0.40/min
Media Conversion
$0.01/min
Stems — Lead & backing vocals
$0.15/min
Stems — Male & female vocals
$0.15/min
Stems — each other specialist group
$0.20/min
Estimated monthly total
Prepaid from your API wallet · failed jobs are never charged.
FAQ
Create an API key, claim your $1 of free credit, and ship your first call in minutes.