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Soniox TTS RT v2

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The best of 25 voices at keeping costs low

Price per 1M characters: $14.81

  • Also strong at
  • Reads codes and addresses rightTied 4th of 26 · 86%
  • Stops quickly when interruptedTied best of 6 · 0 ms

Soniox TTS RT v2: the best of 25 voices at keeping costs low. Its weakest is medical terms, tied 19th of 26.

Last updated Methodology by Dileep Chagam

Soniox TTS RT v2 at a glance

Where it ranks among all 26 voices, in plain words.

Good at
  • Low priceBest of 25
  • Reads codes and addresses rightTied 4th of 26
  • Stops quickly when interruptedTied best of 6
  • Starts talking fast7th of 26
Not so good at

Nothing in the bottom quarter of the voices.

Hear Soniox TTS RT v2

The first read of each test sentence, unedited.

Soniox TTS RT v2

Soniox TTS RT v2 head to head

Pick any voice to set against it. Every pair has its own page.

Compare
MeasureSoniox TTS RT v2Cartesia Sonic 3.5
  1. Non-streaming241 ms261 ms
  2. Streaming183 ms244 ms
  3. Stopping0 ms809 ms
  4. Accuracy83.6%73.1%
  5. Naturalness4.374.41
  6. Price / 1M$14.81$39.20
  7. Measures won5 of 61 of 6
The check marks the better value on each measure. Every pair has its own page with the full numbers.Open this pair · 325 pairs in all

Its closest rivals on speed

Soniox TTS RT v2 FAQ

  • Soniox TTS RT v2 starts in 241 ms on a typical sentence (median) and 290 ms on the slowest 1 in 10 (p90), 7th of 26 voices.

  • Yes. With streamed text, Soniox TTS RT v2 starts 183 ms after the last word arrives.

  • Yes. After the stop it still sends 0 ms of audio (median), which the agent throws away.

  • Soniox TTS RT v2 read 83.6% of the hard parts right, as speech-to-text heard it. Its weakest kind is numbers and shorthand, at 77.8%. This is an estimate, not a listening test.

  • Soniox TTS RT v2 lists at $14.81 per million characters.