CekuraBench

ElevenLabs v4vsGemini 3.8 Flash

ElevenLabs v4Gemini 3.8 Flash
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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 v4678 ms · 80.4%
  • Gemini 3.8 Flash1.29 s · 87.7%

ElevenLabs v4 is better on non-streaming latency and streaming latency. Gemini 3.8 Flash is better on accuracy, naturalness and price.

Last updated Methodology by Dileep Chagam

Which is better at what

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

MeasureElevenLabs v4Gemini 3.8 Flash
  • Non-streaming latency (median)ElevenLabs v4 is better678 ms1.29 s
  • Streaming latency (median)ElevenLabs v4 is better561 msCan't stream
  • Extra audio after a stopFinishes firstNo stop message
  • Hard parts read rightGemini 3.8 Flash is better80.4%87.7%
  • Naturalness (1 to 5)Gemini 3.8 Flash is better4.424.46
  • Price per 1M charactersGemini 3.8 Flash is better$80.00$28.66
Hard parts read rightElevenLabs v4Gemini 3.8 Flash
  • Numbers and shorthand7 a.m. · 20% · 36°F · approx.72%84%
  • Codes and addressesSAVE20 · help@north-clinic.org · 1-800-555-019983%82%
  • Read from contextSt. Mary's on Main St. · Dr. Okafor88%98%
  • 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 v4Gemini 3.8 Flash
  • Non-streaming latency (median)20 of 2625 of 26
  • Streaming latency (median)17 of 18n/a
  • Extra audio after a stopn/an/a
  • Hard parts read right15 of 266 of 26
  • Naturalness (1 to 5)9 of 266 of 26
  • Price per 1M characters23 of 2512 of 25

Related comparisons

ElevenLabs v4 vs Gemini 3.8 Flash FAQ

  • ElevenLabs v4. ElevenLabs v4: 678 ms. Gemini 3.8 Flash: 1.29 s.

  • ElevenLabs v4. ElevenLabs v4: 561 ms. Gemini 3.8 Flash: Can't stream.

  • Neither has a figure. ElevenLabs v4: Finishes first. Gemini 3.8 Flash: No stop message.

  • Gemini 3.8 Flash. ElevenLabs v4: 80.4%. Gemini 3.8 Flash: 87.7%.

  • Gemini 3.8 Flash. ElevenLabs v4: $80.00. Gemini 3.8 Flash: $28.66.