There is no definitive answer to the smartest AI globally, as AI models are designed for specific applications. DeepMind’s AlphaZero, IBM Watson, and OpenAI’s GPT-4 are some of the most advanced systems. AlphaZero, for instance, is exceptional in strategic games like chess and Go, while GPT-4 is optimized for language generation and understanding. Each excels in its domain, making it difficult to determine a single “smartest” AI.