Speech API Cost Calculator | Compare STT & TTS Pricing

OpenAI Whisper (speech-to-text) is priced at $0.006 per minute of audio processed, rounded to the nearest second. For example, 100 minutes of transcription costs $0.60. Enter your expected monthly audio volume to project total monthly spend.

TTS-1 is optimized for low latency (real-time applications), while TTS-1-HD offers higher audio quality but may be slower. HD costs twice as much per character.

Pricing varies by provider and usage tier. At low volumes, Whisper and Google Speech-to-Text are often competitive. At high volumes, batch discounts and custom contracts can significantly reduce costs. Use Compare mode in this calculator to run the same monthly audio volume across providers and see ranked costs.

Enter the average audio duration per request and the number of requests per month. The calculator multiplies per-minute cost by your total monthly minutes and projects the total spend. Switch to Compare mode to see how the estimate changes across different providers.

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