Which voice sounds most human?
…
Play both voices to unlock voting · space to play
3 of these 10 rounds hide a real human — spot them; call the rest all-AI.
The leaderboard
The line every voice is chasing
Humanness runs 0–100. The human sits at 100; an AI reaches it only when listeners can no longer tell them apart.
View the full leaderboardHow it works
Ten seconds a round. Real statistics underneath.
Listen, blind
Two anonymous voices read the same line — no names, no logos, only audio.
Pick the more human voice
Even when both are AI, one usually sounds more human. Pick the one closer to a real person.
See the ranking
Each vote feeds a Bradley-Terry model with 95% intervals, anchored to a real human.
Get the 2026 humanness report
Enter your email to get the report when it ships, plus a heads-up when the ranking moves.
- The full 2026 humanness report (PDF) when it ships
- An email when the ranking shifts — new voices, protocol changes
- Per-voice failure maps from listener tags, once collected
Every voice here runs on Speko
Speko is the voice-AI gateway — one API for ElevenLabs, OpenAI, Cartesia and every provider above, auto-picked by benchmark for latency, cost and naturalness.
The arena
Think you can tell human from machine?
It takes ten seconds a round. Your ears help rank every voice in the arena.
Play a round