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Inworld

inworld-tts-2

Measured 2026-07-03

Run inworld-tts-2 on Speko →

One API, every model on this board.

Naturalness

1561

Win % · 95% CI

63%

57–69%

Drift

9

Measured 2026-10-30

Synth p50

116ms

116–125 p50–p90

Robustness

0.82

Fined:

• fatal · ordinals (×0.5) — never said “one thousandth” (7 of 7 transcripts)

→ we sent “This is our 1,000th order.”

→ it said “This is our one-zero-th order.”

• minor · times · promptable — said “slash” out loud (4 of 7 transcripts)

→ we sent “Meet at 8:45 a.m. PT / 11:45 a.m. ET.”

→ it said “Meet at eight forty-five AM Pacific Time, slash eleven forty-five AM Eastern Time.”

• minor · dates · promptable (international, ×0.4) — said “slash” out loud (5 of 7 transcripts)

→ we sent “The lease ends 2025/06/30.”

→ it said “The lease ends two thousand twenty-five slash zero six slash thirty.”

Cost / 1M chars

$25.0

On-demand. Drops to $20 on Creator and $12.50 on Growth.

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