CekuraBench

Gradium TTS

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The best of 18 voices at starting fast on streamed text

Streaming latency (median): −64 ms

  • Also strong at
  • Starts talking fast2nd of 26 · 76 ms
  • Sounds natural3rd of 26 · 4.51

Gradium TTS: the best of 18 voices at starting fast on streamed text. Its weakest is read from context, 24th of 26.

Last updated Methodology by Dileep Chagam

Gradium TTS at a glance

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

Good at
  • Fast with streamed textBest of 18
  • Starts talking fast2nd of 26
  • Sounds natural3rd of 26
Not so good at
  • Misreads read from context24th of 26

Hear Gradium TTS

The first read of each test sentence, unedited.

Gradium TTS

Gradium TTS head to head

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

Compare
MeasureGradium TTSInworld TTS-2 Flash
  1. Non-streaming76 ms46 ms
  2. Streaming−64 ms45 ms
  3. StoppingNo stop messageNo stop message
  4. Accuracy79.5%93.2%
  5. Naturalness4.514.46
  6. Price / 1M$36.00$15.00
  7. Measures won2 of 63 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

Gradium TTS FAQ

  • Gradium TTS starts in 76 ms on a typical sentence (median) and 105 ms on the slowest 1 in 10 (p90), 2nd of 26 voices.

  • Yes. With streamed text, Gradium TTS starts 64 ms before the last word arrives.

  • Gradium TTS has no stop message, so the agent has to close the connection to stop it.

  • Gradium TTS read 79.5% of the hard parts right, as speech-to-text heard it. Its weakest kind is read from context, at 66.7%. This is an estimate, not a listening test.

  • Gradium TTS lists at $36.00 per million characters.