← Text-to-Speech

MiniMax

speech-2.8-hd

Measured 2026-07-03

Naturalness

1431

Win % · 95% CI

36%

30–43%

Drift

12

Synth p50

294ms

294–354 p50–p90

Robustness

0.00

Fined:

• minor · currency (international, ×0.4) — kept the value but never said “yen”; a prompt fixes this (3 of 7 transcripts)

→ we sent “The fare is ¥12,800 one way.”

→ it said “The fare is twelve thousand eight hundred yuan one way.”

• minor · dates — kept the value but never said “december”; a prompt fixes this (7 of 7 transcripts)

→ we sent “We close on Dec 24.”

→ it said “We close on Deck twenty-four.”

• serious · dates — never said “october” or “two” (7 of 7 transcripts)

→ we sent “The deadline moved to 10/02.”

→ it said “The deadline moved to ten halves.”

• serious · dates — never said “march” (7 of 7 transcripts)

→ we sent “Your slot is 03/09 this year.”

→ it said “Your slot is three-ninths this year.”

• minor · dates — kept the value but never said “february”; a prompt fixes this (3 of 7 transcripts)

→ we sent “Renewal is 02/29/2024.”

→ it said “Renewal is zero two twenty nine twenty twenty four.”

• fatal · large numbers — never said “one thousand forty two” (5 of 7 transcripts)

→ we sent “Your queue position is 1,042.”

→ it said “Jo koan posizjon is an zero katre doe.”

• fatal · math operators — never said “three to one” (7 of 7 transcripts)

→ we sent “Mix it at a 3:1 ratio.”

→ it said “Mix it at a tro contra ratio.”

• fatal · times — never said “nine” or “a m” (7 of 7 transcripts)

→ we sent “We open at 9:00am.”

→ it said “We openen at negeens ochtends.”

• minor · times — kept the value but never said “six oh five”; a prompt fixes this (4 of 7 transcripts)

→ we sent “Boarding runs 6:05 to 6:20.”

→ it said “Boarding runs six five to six twenty.”

• fatal · units — never said “five foot eleven” (7 of 7 transcripts)

→ we sent “He is 5'11" tall.”

→ it said “He is wiesiüksi toista tall.”

Cost / 1M chars

$100.0

HD tier; speech-2.8-turbo ≈ $60/1M.

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