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Text-to-Speech · Multilingual

Indonesian

Language

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Benchmarks

X
Y
0.200.400.600.80500ms1.00sRobustness higher is betterTime to first audio lower is betterGemini 3.8-flash-ttsGemini 3.8-flash-lite-ttsElevenLabs eleven_v4_turboSoniox tts-rt-v2Cartesia sonic-3.5OpenAI gpt-4o-mini-ttsElevenLabs eleven_v3_conversationalspeko.ai/benchmarks

Time to first audio

lower is better

The pause the caller hears before the agent starts speaking. Figures are the English measurement — Indonesian has no sweep of its own yet.

Cartesiasonic-3.5108ms · 234ms
ElevenLabseleven_v4_turbo205ms
ElevenLabseleven_v3_conversational255ms · 298ms
Sonioxtts-rt-v2406ms · 462ms
GeminiGemini3.8-flash-lite-tts497ms
OpenAIgpt-4o-mini-tts724ms · 1.03s
GeminiGemini3.8-flash-tts1.03s
0ms300ms600ms900ms

p50 p90

Robustness

higher is better

Whether the voice says the right words for a number, date, currency amount or operator.

Gemini0.86
Gemini0.81
0.75
0.73
Azure0.59
0.57
Google Chirp 3 HD0.53
0.48
0.38
Speechify0.22
0.13
0.000.250.500.751.00

Cost

lower is better

$ per 1M characters · vendor list price, the same in every language

$10
$13
$15
$15
$20
$20
$40
$50
$50
GeminiGemini3.8-flash-lite-ttsSonioxtts-rt-v2GeminiGemini3.8-flash-ttsxAI GrokttsOpenAIgpt-4o-mini-ttsSpeechifySpeechifysimba-3.5ElevenLabseleven_v4_turboElevenLabseleven_v3_conversationalCartesiasonic-3.5