Rime Coda Rime · text-to-speech (TTS) API

Speed

On Coval's 30-day window ending October 22, 2026 (1,302 runs from US East), Rime Coda starts speaking after 299.6 ms on a typical turn (median) and 415 ms on a slow turn (P95, the slowest one in twenty). That P95 is 19th lowest of the 32 models Coval measures, which puts it in the Visible delay tier: the voice becomes a visible part of the delay. On the median it is a tie (gap under 10 ms) with Cartesia Sonic 3.6. Speko's board plots it at 148 ms time to first audio from US East.

Voice quality

Speko rates its naturalness at 1,535 Elo from blind A/B votes on phone-agent lines (20th highest of the 43 models Speko rates). In the Artificial Analysis Speech Arena it holds 1,056 ±12 Elo (95% interval), 62nd highest of the 98 models Artificial Analysis rates; scores whose intervals overlap are a tie. In its Customer Service category, Artificial Analysis places it 52nd, at 1,101 Elo.

Numbers and dates

Speko has not scored its pronunciation of numbers and dates.

Price

Coval lists $50 per 1M characters (since Aug 10, 2026). Artificial Analysis lists $50. Speko lists about $50. List prices, as each source prints them.

Languages tested

Tested in Korean by Artificial Analysis or Speko. A language missing here was not tested, which does not mean it is unsupported.