Hopper
Qwen3-TTS
served from Oregon
Measured 2026-10-08
Build voice agents on Speko →Qwen3-TTS is measured here for comparison — it is not one of the models Speko routes.
Naturalness
1406
Win % · 95% CI
—
Drift
20
Measured 2026-10-08. All 20 takes of the same text differ.
Synth p50
—
Robustness
0.29
Fined:
• fatal · currency — dropped the minus sign (4 of 7 transcripts)
→ we sent “Your balance is -$1,204.50 as of today.”
→ it said “Your balance is nineus tweepounds and four thousand fifty dollars as of today.”
• 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.”
• fatal · units — never said “one and a half” (49 of 49 transcripts)
→ we sent “Add 1 1/2 cups of flour.”
→ it said “Add one one-half cups of flour.”
+ 27 more fined
Cost / 1M chars
$5.67
Billed at $0.30 per audio hour. At the 14.7 characters per second measured on voice hudson, that is about $5.67 per 1M characters.
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