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Cartesia Sonic 3.5vsRime Mist v3

Cartesia Sonic 3.5Rime Mist v3
Compare

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 Mist v3292 ms · 77.2%

Cartesia Sonic 3.5 is better on non-streaming latency, streaming latency, stopping and naturalness. Rime Mist v3 is better on accuracy and price.

Last updated Methodology by Dileep Chagam

Which is better at what

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

MeasureCartesia Sonic 3.5Rime Mist v3
  • Non-streaming latency (median)Cartesia Sonic 3.5 is better261 ms292 ms
  • Streaming latency (median)Cartesia Sonic 3.5 is better244 ms293 ms
  • Extra audio after a stopCartesia Sonic 3.5 is better809 msNo stop message
  • Hard parts read rightRime Mist v3 is better73.1%77.2%
  • Naturalness (1 to 5)Cartesia Sonic 3.5 is better4.414.34
  • Price per 1M charactersRime Mist v3 is better$39.20$30.00
Hard parts read rightCartesia Sonic 3.5Rime Mist v3
  • Numbers and shorthand7 a.m. · 20% · 36°F · approx.69%71%
  • Codes and addressesSAVE20 · help@north-clinic.org · 1-800-555-019975%77%
  • Read from contextSt. Mary's on Main St. · Dr. Okafor54%71%
  • Medical termslevothyroxine · gastroenterology97%100%

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 Mist v3
  • Non-streaming latency (median)8 of 2613 of 26
  • Streaming latency (median)10 of 1813 of 18
  • Extra audio after a stop6 of 6n/a
  • Hard parts read right24 of 2620 of 26
  • Naturalness (1 to 5)14 of 2618 of 26
  • Price per 1M characters16 of 2513 of 25

Related comparisons

Cartesia Sonic 3.5 vs Rime Mist v3 FAQ

  • Cartesia Sonic 3.5. Cartesia Sonic 3.5: 261 ms. Rime Mist v3: 292 ms.

  • Cartesia Sonic 3.5. Cartesia Sonic 3.5: 244 ms. Rime Mist v3: 293 ms.

  • Cartesia Sonic 3.5. Cartesia Sonic 3.5: 809 ms. Rime Mist v3: No stop message.

  • Rime Mist v3. Cartesia Sonic 3.5: 73.1%. Rime Mist v3: 77.2%.

  • Rime Mist v3. Cartesia Sonic 3.5: $39.20. Rime Mist v3: $30.00.