What is the most realistic AI?

In the realm of rapidly advancing artificial intelligence (AI) technologies, it's a pertinent question to ask: "What is the most realistic AI?" As we delve into this query, we're not just referring to the most technically sophisticated or the most widely used AI. We're looking for the AI that most closely simulates or emulates human behavior, thinking, and emotions. To put it simply, we're seeking the AI that feels the most "real" to us. It could be a chatbot that convincingly mimics human conversation, a robot that seamlessly integrates into our daily lives, or an AI-driven system that accurately predicts human behavior patterns. So, the question begs: which AI technology has come closest to replicating the complexities of human cognition and emotion, making it seem almost indistinguishable from a real human being? And how do we define "realism" in the context of AI, given its vast and evolving landscape?