CekuraBench

Inworld TTS-2 FlashvsInworld TTS-2

Inworld TTS-2 FlashInworld TTS-2
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
  • Inworld TTS-2 Flash46 ms · 93.2%
  • Inworld TTS-2126 ms · 93.4%

Inworld TTS-2 Flash is better on non-streaming latency, streaming latency and price. Inworld TTS-2 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.

MeasureInworld TTS-2 FlashInworld TTS-2
  • Non-streaming latency (median)Inworld TTS-2 Flash is better46 ms126 ms
  • Streaming latency (median)Inworld TTS-2 Flash is better45 ms127 ms
  • Extra audio after a stopNo stop messageNo stop message
  • Hard parts read rightInworld TTS-2 is better93.2%93.4%
  • Naturalness (1 to 5)Inworld TTS-2 is better4.464.52
  • Price per 1M charactersInworld TTS-2 Flash is better$15.00$25.00
Hard parts read rightInworld TTS-2 FlashInworld TTS-2
  • Numbers and shorthand7 a.m. · 20% · 36°F · approx.93%93%
  • Codes and addressesSAVE20 · help@north-clinic.org · 1-800-555-019986%86%
  • Read from contextSt. Mary's on Main St. · Dr. Okafor98%100%
  • Medical termslevothyroxine · gastroenterology99%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

MeasureInworld TTS-2 FlashInworld TTS-2
  • Non-streaming latency (median)1 of 263 of 26
  • Streaming latency (median)2 of 185 of 18
  • Extra audio after a stopn/an/a
  • Hard parts read right2 of 261 of 26
  • Naturalness (1 to 5)5 of 262 of 26
  • Price per 1M characters2 of 2510 of 25

Related comparisons

Inworld TTS-2 Flash vs Inworld TTS-2 FAQ

  • Inworld TTS-2 Flash. Inworld TTS-2 Flash: 46 ms. Inworld TTS-2: 126 ms.

  • Inworld TTS-2 Flash. Inworld TTS-2 Flash: 45 ms. Inworld TTS-2: 127 ms.

  • Neither has a figure. Inworld TTS-2 Flash: No stop message. Inworld TTS-2: No stop message.

  • Inworld TTS-2. Inworld TTS-2 Flash: 93.2%. Inworld TTS-2: 93.4%.

  • Inworld TTS-2 Flash. Inworld TTS-2 Flash: $15.00. Inworld TTS-2: $25.00.