CekuraBench

Cartesia Sonic 3.6vsElevenLabs v3

Cartesia Sonic 3.6ElevenLabs 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 3.6286 ms · 74.9%
  • ElevenLabs v3320 ms · 87.2%

Cartesia Sonic 3.6 is better on non-streaming latency, streaming latency, stopping and price. ElevenLabs v3 is better on accuracy.

Last updated Methodology by Dileep Chagam

Which is better at what

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

MeasureCartesia Sonic 3.6ElevenLabs v3
  • Non-streaming latency (median)Cartesia Sonic 3.6 is better286 ms320 ms
  • Streaming latency (median)Cartesia Sonic 3.6 is better270 msCan't stream
  • Extra audio after a stopCartesia Sonic 3.6 is better764 msNo stop message
  • Hard parts read rightElevenLabs v3 is better74.9%87.2%
  • Naturalness (1 to 5)Level4.414.41
  • Price per 1M charactersCartesia Sonic 3.6 is better$39.20$40.00
Hard parts read rightCartesia Sonic 3.6ElevenLabs v3
  • Numbers and shorthand7 a.m. · 20% · 36°F · approx.71%81%
  • Codes and addressesSAVE20 · help@north-clinic.org · 1-800-555-019975%89%
  • Read from contextSt. Mary's on Main St. · Dr. Okafor58%94%
  • Medical termslevothyroxine · gastroenterology100%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 3.6ElevenLabs v3
  • Non-streaming latency (median)11 of 2614 of 26
  • Streaming latency (median)12 of 18n/a
  • Extra audio after a stop5 of 6n/a
  • Hard parts read right23 of 2610 of 26
  • Naturalness (1 to 5)12 of 2613 of 26
  • Price per 1M characters16 of 2518 of 25

Related comparisons

Cartesia Sonic 3.6 vs ElevenLabs v3 FAQ

  • Cartesia Sonic 3.6. Cartesia Sonic 3.6: 286 ms. ElevenLabs v3: 320 ms.

  • Cartesia Sonic 3.6. Cartesia Sonic 3.6: 270 ms. ElevenLabs v3: Can't stream.

  • Cartesia Sonic 3.6. Cartesia Sonic 3.6: 764 ms. ElevenLabs v3: No stop message.

  • ElevenLabs v3. Cartesia Sonic 3.6: 74.9%. ElevenLabs v3: 87.2%.

  • Cartesia Sonic 3.6. Cartesia Sonic 3.6: $39.20. ElevenLabs v3: $40.00.