Inworld
inworld-tts-2-flash
Measured 2026-09-03
Run inworld-tts-2-flash on Speko →One API, every model on this board.
Naturalness
1501
Win % · 95% CI
—
not measured
Drift
13
Synth p50
82ms
82–89 p50–p90
Robustness
0.58
Fined:
• 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.”
• fatal · ordinals (×0.5) — never said “one thousandth” (49 of 49 transcripts)
→ we sent “This is our 1,000th order.”
→ it said “This is our one zeroth order.”
• minor · currency · promptable — kept the value but never said “ninety nine cent” (49 of 49 transcripts)
→ we sent “Prices start at 99¢ each.”
→ it said “Prices start at ninety-nine ed-ee each.”
+ 6 more fined
Cost / 1M chars
$15.0
On-demand.
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