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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