Jack Dorsey's payment company Block has released a voice AI model called Dessa, whose voice was remarkably lifelike in company demonstrations, raising market concerns that it could facilitate phone scams and deception. The model is trained entirely on human speech and can listen and speak simultaneously, handling interruptions, laughter, and tone changes in conversations. Block stated that the model was trained on the NVIDIA GB200 NVL72 computing system and is compact enough to run locally on a MacBook Pro equipped with an M4 Max chip. Binance founder CZ believes the Dessa model could benefit the children's education project GiggleAcademy, as its natural voice interaction could help children learn through conversation. Currently, Dessa is still in a research preview phase and is not yet publicly available.