Sergey Brin, co-founder of Google, has returned to the company to focus on artificial intelligence (AI) advancements, working nearly every day since the beginning of 2023. During an interview at the All-In Summit, Brin expressed his excitement for the rapid progress in AI, calling it unprecedented and the most thrilling development in his career. He emphasized that AI's applications extend beyond search, impacting various aspects of daily life and work. Brin also highlighted recent algorithmic improvements that may reduce the need for increased computational power in AI development. However, he cautioned about the limitations and potential biases in AI, advocating for responsible use of the technology. His involvement comes at a critical time for Google, as the company intensifies its AI initiatives amid competitive pressures.