Usage and billing | Nari Labs

GA credits and organization upgrades

Credits are prepaid in USD, do not expire, and pay for all API and Playground usage at the applicable model rate.

Buy prepaid USD credits on the Billing page. A single purchase of $100 or more upgrades an organization to Paid Tier 1 with 10 seats and 20 concurrent TTS requests and 20 concurrent STT connections. Smaller purchases do not accumulate toward the upgrade.

Spending credits does not downgrade the organization, but refunds can remove Paid Tier 1 eligibility. For higher concurrency, custom help, or volume discounts, contact founders@narilabs.com.

Usage measurement

API	Unit
TTS HTTP	Input characters after trimming surrounding whitespace
TTS input streaming	Input characters in completed segments with delivered audio
STT	Accepted input audio duration

TTS HTTP counts Unicode code points after trimming surrounding whitespace, before text normalization. Internal spaces and punctuation count: " Hello. " counts as 6 characters.

TTS input streaming counts Unicode code points without trimming text. The initialization space and standalone single-space keepalives do not count.

STT charges for audio accepted by the API, including silence. Audio accepted before a connection is interrupted is still charged.

Pricing

Models use the rates on Models and pricing:

TTS: input characters ÷ 1,000,000 × the model’s price per million characters.
STT: accepted input audio seconds ÷ 3,600 × the model’s price per audio hour.

For example, 100,000 input characters cost $0.50 with TTS Standard. Ten minutes of input audio cost $0.02 with STT Fast.

Credits

For TTS HTTP, successful requests debit credits; failed and cancelled requests do not.

For TTS input streaming, completed segments debit credits even if the connection later fails or is cancelled.

For STT, accepted audio debits credits even if the connection later fails or is cancelled.

View costs on the Usage page, manage credits on the Billing page, and manage organization members and roles.