Transcribe a 20-second voice note for a third of a cent on Sume

A 20-second voice note costs $0.003334 to transcribe on Sume, because speech-to-text is $0.01 per audio minute prorated per second, not rounded up to a minute. At Microsoft's $0.54 introductory hourly price it is $0.003.

Why it is prorated

Sume's Video Inspect docs give the rate as $0.01 per audio minute. The estimator charges per second, so 20 seconds is 3,334 millionths of a dollar and the catalog rounds displayed prices up to whole cents.

Vendor comparison

Microsoft lists the $0.54 per hour introductory price for MAI-Transcribe-2-Streaming through the end of the year in its announcement. Confirm both rates on the rate card and Microsoft's page before you budget.

Recompute it in Python

Per-minute rate prorated by the second. The numbers are the ones in the table above.

seconds = 20
print(round(seconds * 0.01 / 60, 6))