Block's New AI Voice Sounds So Human It Sparks Scam Fears

Block unveiled Dessa, a voice AI that sounds eerily human — amazing some while raising fears it could power realistic phone scams.

A new artificial intelligence (AI — computer software that mimics human thinking) can now talk so naturally that people can't tell it's a machine. And that's exactly what has some experts worried.

Block, the payments company run by Jack Dorsey (a co-founder of Twitter), has revealed a voice AI called Dessa. Unlike most voice assistants, Dessa was trained only on human speech — not written text. This lets it laugh mid-sentence, pause naturally, and even react to interruptions, just like a real person.

What makes Dessa special:

It processes audio directly, instead of first turning speech into text and back again
It can run locally on a high-end MacBook Pro (M4 Max chip or better), meaning no internet connection is needed
It was built from scratch using a powerful Nvidia computing system
Demos were recorded live, without scripting the AI's responses

The reaction online was split. Some users called it "straight-up sci-fi," amazed at how lifelike it sounded. Changpeng "CZ" Zhao, founder of crypto exchange Binance, said it could help teach children through natural conversation.

But others raised red flags. Filmmaker Justine Bateman asked why AI needs to sound human at all, suggesting it could be used to "trick people into lowering their guard." A journalist warned that scam phone calls could reach "pandemic levels" if fraudsters use such realistic voices to deceive victims.

Important to know:

Dessa is not available to the public yet — it's only a research preview
Block hasn't shared the model's size, performance data, or a release date
Early access is going only to a small group of AI safety researchers to check for risks

Block, which also runs Square, Cash App, and Bitcoin products, says voice AI could one day better detect human emotions like distress or pain — something text alone misses.

The bottom line: Dessa shows how fast AI is becoming indistinguishable from real humans. That power could help education and healthcare — but it could also make scams far harder to spot. For now, it stays locked away with safety experts.

This is an AI-generated summary. Read the original article at: https://www.coindesk.com/tech/2026/10/24/block-s-new-voice-ai-sounds-eerily-human-sparking-awe-and-scam-fears