ElevenLabs Eleven v4 ElevenLabs · text-to-speech (TTS) API

Speed

Speko's board plots it at 852 ms time to first audio from US East; its model page reports a 844 ms sweep.

Voice quality

Speko rates its naturalness at 1,708 Elo from blind A/B votes on phone-agent lines (the highest of the 43 models Speko rates). In the Artificial Analysis Speech Arena it holds 1,329 ±16 Elo (95% interval), 2nd highest of the 98 models Artificial Analysis rates; scores whose intervals overlap are a tie. In its Customer Service category, Artificial Analysis places it 2nd, at 1,369 Elo.

Numbers and dates

Speko's pronunciation test on numbers, dates and currency scores it 0.9 on a 0-to-1 scale (the highest of the 30 models Speko scores). This is the accuracy measure used here; Coval's word error rate separates models too little to compare them.

Price

Artificial Analysis lists $80. Speko lists about $80. List prices, as each source prints them.

Languages tested

Tested in Spanish, German, French, Portuguese, Japanese, Chinese, Arabic, Hindi and Vietnamese by Artificial Analysis or Speko. A language missing here was not tested, which does not mean it is unsupported.