The Cloud Speech API is priced monthly based on the amount of audio successfully processed by the service, measured in increments rounded up to 15 seconds. Pricing tiers are based on the total amount of audio processed by the service per month.

Pricing Table

Feature 0-60 minutes Over 60 minutes, up to 1 million minutes
Speech Recognition Free $0.006 USD / 15 seconds*

This pricing is for applications on personal systems (e.g., phones, tablets, laptops, desktops). Please contact us for approval and pricing to use the Speech API on embedded devices (e.g., cars, TVs, appliances, or speakers).

* Each request is rounded up to the nearest increment of 15 seconds. For example, if you make three separate requests, each containing 7 seconds of audio, you are billed $0.018 USD for 45 seconds (3 × 15 seconds) of audio. Fractions of seconds are included when rounding up to the nearest increment of 15 seconds. That is, 15.14 seconds are rounded up and billed as 30 seconds.

Monthly usage is capped at 1 million minutes per month. For usage above 1 million minutes of audio per month, we would like to understand more about your needs. Please submit a Cloud Speech API Quota Request for your project.

Google Cloud Platform Costs

If you store audio files to be recognized in Google Cloud Storage, or use other Google Cloud Platform resources in tandem with the Cloud Speech API, such as Google App Engine instances, then you will also be billed for the use of those services. See the Google Cloud Platform Pricing Calculator to determine other costs based on current rates.

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Google Cloud Speech API Documentation