# Turing TTS benchmark finds listeners mistake Gemini 3.8 Flash TTS for human

> Original title: We now have a benchmark for how often we're tricked into thinking a voice is human.

- Source: Santiago
- Published: 2026-10-30T18:48:11.000Z
- Bad Influence: https://badinfluence.news/items/qeu1pod074z2kb5o79mofhji5
- Original: https://x.com/svpino/status/2116240767815696868

## Summary

Santiago (@svpino) says a new benchmark measures how often listeners mistake AI speech for human speech in paired recordings. He names Gemini 3.8 Flash TTS as the best model at fooling people, while admitting he is easily fooled himself. The background post introduces Turing TTS, where the best model fooled listeners only about 10% of the time.

## Post

We now have a benchmark for how often we're tricked into thinking a voice is human.

Here is how they measure this:

You hear two recordings of the same text. One is human, and the other is AI. You need to identify the human.

The best model right now at fooling people: Gemini 3.8 Flash TTS.

I suck at this, by the way. I'm the easiest person in the world to fool.

![](https://badinfluence.news/api/img-proxy?u=https%3A%2F%2Fpbs.twimg.com%2Fmedia%2FHV5lw1KaQAAu-1I.jpg&mode=thumb&exp=1793577600&sig=3df5e0a688588478)

## Quoted post @shobhitbanga

> Drop 2/15 
> 
> Are we actually measuring the things we ultimately want our voice AI models to achieve?
> 
> The best AI voices are becoming hard to tell apart.
> From each other. Not from humans.
> 
> 🚀 Introducing Turing TTS: an evaluation that measures how often human listeners mistake AI-generated speech for real human speech.
> 
> We tested leading TTS models against real human speech. Even the best model fooled listeners only ~10% of the time.
> 
> With Turing TTS, we hope to contribute to a broader discussion within the research community about how we measure progress in voice AI.
> 
> If one of our goals is to develop speech that is indistinguishable from human speech, how well do our current evaluation methods capture progress toward that goal?
> 
> We don’t claim that Turing TTS is the right way forward, or that human indistinguishability should be the goal of every TTS system.
> 
> Rather, we hope these findings encourage the community to collectively examine whether blind pairwise human evaluations of naturalness are sufficient, and what else we might need to measure.
> 
> Results are now live on @voicearena_ai.

https://x.com/shobhitbanga/status/2116236563147591818