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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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