If interacting with Siri has been the extent of your experience "talking" to AI, you're in for a rude awakening. While Apple's voice assistant often fumbles basic commands and can take an unnaturally long time to process a request, the latest and greatest AI models are moving closer and closer to natural human speech.

Case in point: Dessa, the brainchild of Jack Dorsey's Block, is allegedly the world's first full-duplex speech model , meaning it can listen to you and speak simultaneously, much like a real human does in the flow of normal conversation. In fact, that's Dessa's draw: it was trained entirely on human speech to make it as natural-sounding as possible.

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