sonic-preview

Naturalness

~1574

Win % · 95% CI

—

Drift

—

Synth p50

119ms

119–127 p50–p90

Robustness

0.00

Fined: fatal x1.0 minus dropped: "-$12.50" read as "twelve dollars and fifty cents" (3/3, both oracle families); serious x1.0 no month on a short slash date: "10/02" read as "ten two" (3/3; shared with sonic-3.5); fatal x0.4 ISO slash date garbled: "2025/06/30" read as "two hundred two may six two thousand thirty" — wrong month, mangled value (3/3, openai + soniox; sonic-3.5 reads it correctly). Basis "us-only": fewer fixtures ran, so this score is optimistic against full-basis rows.

Cost / 1M chars

$50.0

No beta-specific rate published; Cartesia bills credits/char at the plan level (1 credit/char on Pro), the same unit as sonic-3.5.