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Smallest Lightning v3.1

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4th of 26 voices at sounding natural

Naturalness (1 to 5): 4.49

  • Also strong at
  • Low price7th of 25 · $19.50

Smallest Lightning v3.1: 4th of 26 voices at sounding natural. Its weakest is streaming latency, 16th of 18.

Last updated Methodology by Dileep Chagam

Smallest Lightning v3.1 at a glance

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

Good at
  • Sounds natural4th of 26
  • Low price7th of 25
Not so good at
  • Slow with streamed text16th of 18

Hear Smallest Lightning v3.1

The first read of each test sentence, unedited.

Smallest Lightning v3.1

Smallest Lightning v3.1 head to head

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

Compare
MeasureSmallest Lightning v3.1Grok TTS
  1. Non-streaming357 ms358 ms
  2. Streaming363 ms157 ms
  3. StoppingNo stop message0 ms
  4. Accuracy81.3%87.4%
  5. Naturalness4.494.17
  6. Price / 1M$19.50$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

Smallest Lightning v3.1 FAQ

  • Smallest Lightning v3.1 starts in 357 ms on a typical sentence (median) and 679 ms on the slowest 1 in 10 (p90), 17th of 26 voices.

  • Yes. With streamed text, Smallest Lightning v3.1 starts 363 ms after the last word arrives.

  • Smallest Lightning v3.1 has no stop message, so the agent has to close the connection to stop it.

  • Smallest Lightning v3.1 read 81.3% of the hard parts right, as speech-to-text heard it. Its weakest kind is read from context, at 75.0%. This is an estimate, not a listening test.

  • Smallest Lightning v3.1 lists at $19.50 per million characters.