CekuraBench

Cartesia Sonic 3.5vsRime Coda

Cartesia Sonic 3.5Rime Coda
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Speed and accuracy

Left is faster. Higher reads more hard parts right.

Fast and accurate60%70%80%90%100%00.5s1s1.5s2sTime until the caller hears the voice
  • Cartesia Sonic 3.5261 ms · 73.1%
  • Rime Coda282 ms · 76.7%

Cartesia Sonic 3.5 is better on non-streaming latency, streaming latency, stopping and price. Rime Coda is better on accuracy and naturalness.

Last updated Methodology by Dileep Chagam

Which is better at what

Measure by measure, the same sentences, the same place.

MeasureCartesia Sonic 3.5Rime Coda
  • Non-streaming latency (median)Cartesia Sonic 3.5 is better261 ms282 ms
  • Streaming latency (median)Cartesia Sonic 3.5 is better244 ms269 ms
  • Extra audio after a stopCartesia Sonic 3.5 is better809 msNo stop message
  • Hard parts read rightRime Coda is better73.1%76.7%
  • Naturalness (1 to 5)Rime Coda is better4.414.42
  • Price per 1M charactersCartesia Sonic 3.5 is better$39.20$50.00
Hard parts read rightCartesia Sonic 3.5Rime Coda
  • Numbers and shorthand7 a.m. · 20% · 36°F · approx.69%70%
  • Codes and addressesSAVE20 · help@north-clinic.org · 1-800-555-019975%79%
  • Read from contextSt. Mary's on Main St. · Dr. Okafor54%81%
  • Medical termslevothyroxine · gastroenterology97%93%

An estimate: speech-to-text transcribers scored it, not people.

Hear both

The same sentence, read by each voice.

19 sentences, the same for both
  1. 01A greetingThanks for calling Cedar Valley Family Practice, this is Riley. How can I help you today?
  2. 02MoneyYour current balance is $1,347.09.
  3. 03A dateThe order was placed on 2026-03-14 and shipped two days later.
  4. 04Tracking codeThe tracking number is 1Z 7A4 X29 0341 8867.
  5. 05Email addressI have m.rivera88@example.org, is that still current?
  6. 06An Irish nameSiobhan Ó Briain called about the invoice.

How each ranks among all 26

MeasureCartesia Sonic 3.5Rime Coda
  • Non-streaming latency (median)8 of 2610 of 26
  • Streaming latency (median)10 of 1811 of 18
  • Extra audio after a stop6 of 6n/a
  • Hard parts read right24 of 2622 of 26
  • Naturalness (1 to 5)14 of 269 of 26
  • Price per 1M characters16 of 2522 of 25

Related comparisons

Cartesia Sonic 3.5 vs Rime Coda FAQ

  • Cartesia Sonic 3.5. Cartesia Sonic 3.5: 261 ms. Rime Coda: 282 ms.

  • Cartesia Sonic 3.5. Cartesia Sonic 3.5: 244 ms. Rime Coda: 269 ms.

  • Cartesia Sonic 3.5. Cartesia Sonic 3.5: 809 ms. Rime Coda: No stop message.

  • Rime Coda. Cartesia Sonic 3.5: 73.1%. Rime Coda: 76.7%.

  • Cartesia Sonic 3.5. Cartesia Sonic 3.5: $39.20. Rime Coda: $50.00.