CekuraBench

Rime Mist v3vsGrok TTS

Rime Mist v3Grok TTS
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
  • Rime Mist v3292 ms · 77.2%
  • Grok TTS358 ms · 87.4%

Rime Mist v3 is better on non-streaming latency and naturalness. Grok TTS is better on streaming latency, stopping, accuracy and price.

Last updated Methodology by Dileep Chagam

Which is better at what

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

MeasureRime Mist v3Grok TTS
  • Non-streaming latency (median)Rime Mist v3 is better292 ms358 ms
  • Streaming latency (median)Grok TTS is better293 ms157 ms
  • Extra audio after a stopGrok TTS is betterNo stop message0 ms
  • Hard parts read rightGrok TTS is better77.2%87.4%
  • Naturalness (1 to 5)Rime Mist v3 is better4.344.17
  • Price per 1M charactersGrok TTS is better$30.00$15.00
Hard parts read rightRime Mist v3Grok TTS
  • Numbers and shorthand7 a.m. · 20% · 36°F · approx.71%82%
  • Codes and addressesSAVE20 · help@north-clinic.org · 1-800-555-019977%86%
  • Read from contextSt. Mary's on Main St. · Dr. Okafor71%100%
  • Medical termslevothyroxine · gastroenterology100%99%

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

MeasureRime Mist v3Grok TTS
  • Non-streaming latency (median)13 of 2618 of 26
  • Streaming latency (median)13 of 187 of 18
  • Extra audio after a stopn/a1 of 6
  • Hard parts read right20 of 268 of 26
  • Naturalness (1 to 5)18 of 2625 of 26
  • Price per 1M characters13 of 252 of 25

Related comparisons

Rime Mist v3 vs Grok TTS FAQ

  • Rime Mist v3. Rime Mist v3: 292 ms. Grok TTS: 358 ms.

  • Grok TTS. Rime Mist v3: 293 ms. Grok TTS: 157 ms.

  • Grok TTS. Rime Mist v3: No stop message. Grok TTS: 0 ms.

  • Grok TTS. Rime Mist v3: 77.2%. Grok TTS: 87.4%.

  • Grok TTS. Rime Mist v3: $30.00. Grok TTS: $15.00.