Invoice line
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.
Prompt
The invoice totals $1,156.40, due 2026-08-24, reference KWAI-9F.
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provider default
Cost--Generation time3.3sCorrectness100%george
Cost--Generation time3.0sCorrectness100%george
Cost--Generation time2.5sCorrectness100%provider default
Cost$0.00096Generation time1.7sCorrectness100%provider default
Cost--Generation time2.2sCorrectness100%nadine
Cost--Generation time9.9sCorrectness100%
voice_3150
Cost--Generation time3.0sCorrectness100%
loongjohn
Cost--Generation time2.1sCorrectness100%
aura-2-thalia-en
Cost$0.002Generation time3.1sCorrectness94%
Zephyr
Cost--Generation time7.5sCorrectness94%- Google AI Studio
Zephyr
Cost$0.003Generation time5.0sCorrectness88% provider default
Cost$0.00096Generation time1.1sCorrectness83%nadine
Cost--Generation time2.6sCorrectness83%george
Cost--Generation time0.7sCorrectness82%george
Cost--Generation time0.8sCorrectness82%
en-US-Harper:MAI-Voice-2
Cost$0.00096Generation time1.3sCorrectness82%longanlingxin
Cost$0.001Generation time3.3sCorrectness82%English_expressive_narrator
Cost--Generation time1.3sCorrectness79%eve
Cost$0.00096Generation time1.7sCorrectness79%en-US-Harper:MAI-Voice-2
Cost$0.001Generation time1.1sCorrectness76%george
Cost--Generation time3.3sCorrectness72%provider default
Cost--Generation time2.2sCorrectness70%cs-CZ-Grant:MAI-Voice-2.1-Flash
Cost--Generation time1.0sCorrectness68%george
Cost--Generation time0.7sCorrectness65%george
Cost--Generation time4.2sCorrectness65%cs-CZ-Grant:MAI-Voice-2.1
Cost--Generation time2.3sCorrectness63%
af_alloy
Cost$0.00004Generation time0.5sCorrectness62%English_expressive_narrator
Cost$0.006Generation time1.7sCorrectness61%tara
Cost$0.00045Generation time9.4sCorrectness59%en_paul_sad
Cost--Generation time2.0sCorrectness57%flux-alexis-en
Cost--Generation time10.7sCorrectness52%george
Cost--Generation time2.1sCorrectness46%conversational_a
Cost$0.00045Generation time21.7sCorrectness40%george
Cost--Generation time2.0sCorrectness38%Zephyr
Cost--Generation time5.0sCorrectness33%provider default
Cost--Generation time16.3sCorrectness32%geffen_32
Cost--Generation time1.5sCorrectness--