ElevenLabs Flash v2.5vsElevenLabs v4 Turbo

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
  • ElevenLabs Flash v2.5182 ms · 64.4%
  • ElevenLabs v4 Turbo176 ms · 79.9%

ElevenLabs v4 Turbo is better on non-streaming latency, streaming latency, accuracy and naturalness.

Last updated Methodology by Dileep Chagam

Which is better at what

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

MeasureElevenLabs Flash v2.5ElevenLabs v4 Turbo
  • Non-streaming latency (median)ElevenLabs v4 Turbo is better182 ms176 ms
  • Streaming latency (median)ElevenLabs v4 Turbo is better177 ms69 ms
  • Extra audio after a stopFinishes firstFinishes first
  • Hard parts read rightElevenLabs v4 Turbo is better64.4%79.9%
  • Naturalness (1 to 5)ElevenLabs v4 Turbo is better4.334.42
  • Price per 1M charactersLevel$40.00$40.00
Hard parts read rightElevenLabs Flash v2.5ElevenLabs v4 Turbo
  • Numbers and shorthand7 a.m. · 20% · 36°F · approx.55%71%
  • Codes and addressesSAVE20 · help@north-clinic.org · 1-800-555-019955%82%
  • Read from contextSt. Mary's on Main St. · Dr. Okafor75%88%
  • 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

MeasureElevenLabs Flash v2.5ElevenLabs v4 Turbo
  • Non-streaming latency (median)5 of 264 of 26
  • Streaming latency (median)8 of 183 of 18
  • Extra audio after a stopn/an/a
  • Hard parts read right26 of 2616 of 26
  • Naturalness (1 to 5)21 of 2611 of 26
  • Price per 1M characters18 of 2518 of 25

ElevenLabs Flash v2.5 vs ElevenLabs v4 Turbo FAQ

  • ElevenLabs v4 Turbo. ElevenLabs Flash v2.5: 182 ms. ElevenLabs v4 Turbo: 176 ms.

  • ElevenLabs v4 Turbo. ElevenLabs Flash v2.5: 177 ms. ElevenLabs v4 Turbo: 69 ms.

  • Neither has a figure. ElevenLabs Flash v2.5: Finishes first. ElevenLabs v4 Turbo: Finishes first.

  • ElevenLabs v4 Turbo. ElevenLabs Flash v2.5: 64.4%. ElevenLabs v4 Turbo: 79.9%.

  • They are level. ElevenLabs Flash v2.5: $40.00. ElevenLabs v4 Turbo: $40.00.