Larry Page and Sergey Brin, the co-founders of Alphabet's Google, are riding high, with their combined fortunes swelling by $18 billion due to the search engine's artificial intelligence frenzy this week, which boosted the company's stock.

During Google I/O, the annual developer conference, this week, the company unveiled a revamped search engine — which integrates an AI chatbot's responses into search results — and made its chatbot available more widely.

Page and Brin have been the beneficiaries of the AI frenzy, with their fortunes swelling this week. According to the Bloomberg Billionaires Index, Page's net worth skyrocketed by $9.4 billion to $106.9 billion, while Brin's rose by $8.9 billion to $102.1 billion. Since February 2021, this has been their biggest weekly gain.

Page and Brin, who have been helping with the AI push and are more actively involved in the business than they have been in years, are among the biggest gainers of 2023 after adding more than $22 billion each. They are, at present, the eighth- and ninth-richest persons in the world, respectively, according to the Bloomberg Billionaires Index.