← Text-to-Speech 
Deepgram
aura-2
Measured 2026-07-03
Run aura-2 on Speko →One API, every model on this board.
Naturalness
1584
Win % · 95% CI
65%
58–70%
Drift
9
Synth p50
125ms
125–138 p50–p90
Robustness
0.20
Fined:
• fatal · currency — dropped the minus sign (35 of 35 transcripts)
→ we sent “Your account shows −$85.40 after the refund.”
→ it said “Your account shows 85.4 after the refund.”
• fatal · dates — never said “friday” or “sunday” (21 of 35 transcripts)
→ we sent “The fair runs Fri–Sun, Oct 9–11.”
→ it said “The fair runs Fri Sun, October ninth eleven.”
• fatal · large numbers — never said “zero zero” (5 of 5 transcripts)
→ we sent “Only 007 seats remain.”
→ it said “Only seven seats remain.”
+ 22 more fined
Cost / 1M chars
$30.0
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