Why we chose this prompt: A dollar amount, an ISO date and an alphanumeric reference code in one line. Each has a conventional spoken form, and reading them as written or guessing wrong is a common failure in production use.
The invoice totals $1,156.40, due 2026-08-24, reference KWAI-9F.
provider default
george
george
provider default
provider default

loongjohn
aura-2-thalia-en
george

af_alloy
provider default
george
george

en-US-Harper:MAI-Voice-2
eve
Zephyr

en-US-Harper:MAI-Voice-2

cs-CZ-Grant:MAI-Voice-2.1-Flash

longanlingxin
provider default
george
george

cs-CZ-Grant:MAI-Voice-2.1
tara
flux-alexis-en
English_expressive_narrator
English_expressive_narrator

en_paul_sad
george
george
conversational_a
provider default
Zephyr
Zephyr
nadine
nadine

voice_3150