// the tts latency test
Which voice API is
actually the fastest?
Not benchmarks from a press release. Not numbers from a blog post. This page calls 4 live APIs — right now, from our server — and shows you exactly who wins.
smallest.ai Lightning v3.1 · Cartesia Sonic 3 · OpenAI TTS-1 · Deepgram Aura 2
test phrase
// race log
+0ms
_
live results
final standings
// total latency (ms) — lower is faster
All providers called simultaneously from the same Vercel edge. Latency includes round-trip from server → provider → server → browser. Relative rankings reflect true API speed.