Pricing for SpeechKit

To calculate the cost of using the service, use the calculator or see the prices on this page.

What goes into the cost of using SpeechKit

Using speech synthesis

The cost of using the SpeechKit API for speech synthesis is calculated based on the total number of characters sent to generate speech from text in a calendar month (Reporting period).

The number of characters in a request is determined considering spaces and special characters. The cost of an empty request is equal to the cost of one character.

Using speech recognition

The final cost depends on the duration of the recognized audio. Cost is calculated for a calendar month (Reporting period).

Short audio recognition

These rules apply to short audio recognition by request and in streaming mode.

Billable unit — a 15-second segment of single-channel audio. Shorter segments are rounded up (1 second becomes 15 seconds).

Examples:

• 1 audio fragment that is 37 seconds is billed as 45 seconds.

  Explanation: the audio is divided into 2 15-second segments and one 7-second segment. The length of the last segment is rounded up to 15 seconds. Total: 3 segments, 15 seconds each.

• 2 audio fragments that are 5 and 8 seconds are billed as 30 seconds.

  Explanation: the length of each audio is rounded up to 15 seconds. Total: 2 segments, 15 seconds each.

Recognition of long audio fragments

These rules apply to long audio recognition.

Billable unit — 1 second of two-channel audio. Shorter segments are rounded up. The number of channels is rounded up to an even number.

The minimum billable amount is 15 seconds for every pair of channels. Audio with a shorter duration is billed as 15 seconds.

Examples of rounding audio length:

Length	Number of channels	Seconds charged
1 second	1	15
1 second	2	15
1 second	3	30
15.5 seconds	2	16
15.5 seconds	4	32

Pricing

Speech synthesis

Speech recognition