The speculation emerged after posts on X last week from users claiming to have inside knowledge said Yin had left academia to work at OpenAI on research combining artificial intelligence and theoretical physics, according to Chinese technology outlet China AI News.

Insiders reported that he may be working at OpenAI during a sabbatical while retaining his faculty position.

Neither OpenAI nor Yin has publicly confirmed the move, and his profile remains active on Harvard's website.

Born in 1983 in Zhuzhou, Hunan Province, Yin entered the University of Science and Technology of China's Special Class for the Gifted Young at age 12.

He earned a doctorate in physics from Harvard in 2006 under renowned string theory and quantum gravity researcher Andrew Strominger before joining the university's physics faculty in 2008. At 31, he was promoted to full professor, becoming the youngest Chinese full professor in Harvard's history, according to China AI News.

Chinese physicist Xi Yin. Photo courtesy of Harvard University

Over his career, Yin has received several prestigious honors, including the Sloan Research Fellowship in 2013 and the 2017 New Horizons in Physics Prize for his work in string theory.

According to his Harvard faculty profile, his research focuses on some of the most challenging questions in modern physics, including string theory, quantum field theory, and the relationship between gravity and quantum mechanics. His recent work centers on low-dimensional quantum gravity and the connection between gauge theory and string theory.

Yin has also expressed optimism about AI's potential to accelerate scientific discovery.

In an April interview with The Harvard Crimson, he said AI allows him to take on projects he would not otherwise consider because of its computing power, increasing his productivity by "at least 100" times and producing in weeks the code that would take him "10 years to write."

"I personally do not believe there’s any single human intellectual capability that cannot be replicated with AI," he added.

Yin's reported move comes days after Su Weijie, a statistics professor at the Wharton School of the University of Pennsylvania, announced that he had joined OpenAI during a sabbatical to work on AI model training, according to Chinese technology outlet 36Kr.

Su, who recently received the 2026 COPSS Presidents' Award, often described as the "Nobel Prize of Statistics," is among a growing number of researchers from fields beyond computer science who are being recruited by OpenAI. Yu Bai, an OpenAI researcher and Peking University alumnus, previously said that "professor density" has become a new measure of the company's intelligence.

Other reported recruits include Geoff Penington, a Stanford physicist and winner of the 2021 New Horizons in Physics Prize, who lists OpenAI on his public profile, and black hole physicist Alex Lupsasca, who joined the company in late 2025 after the formation of its OpenAI for Science team.