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Mistral

Voxtral Mini TTS 3

Measured 2026-10-22

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Voxtral Mini TTS 3 is measured here for comparison — it is not one of the models Speko routes.

Naturalness

1411

Win % · 95% CI

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Drift

17

Measured 2026-10-22. All 20 takes of the same text differ; mean pairwise distance 0.172.

Synth p50

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Robustness

0.41

Fined:

• fatal · currency — dropped the minus sign (7 of 7 transcripts)

→ we sent “The balance is -$12.50.”

→ it said “The balance is twelve dollars and fifty cents.”

• fatal · large numbers — never said “eight point one billion” (6 of 7 transcripts)

→ we sent “Population reached 8,100,000,000 in 2023.”

→ it said “population reached eight million one hundred million in twenty twenty three”

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

→ we sent “Renewal falls on 1/1/2027.”

→ it said “Renewal falls on one first twenty twenty seven.”

+ 12 more fined

Cost / 1M chars

$13.0

Mistral lists $13 per 1M input characters (docs.mistral.ai model page, read 2026-10-22).

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