Tech Buzz China · Researcher profileandChina Research CollectiveAI ProemChina Research CollectiveAs of May 29, 2026
REN Hongyu (任泓宇)
Researcher, Meta Superintelligence Labs (since 2025)
Known for
Meta MSL researcher (Jun 2025) · OpenAI post-training lead: o3, o4-mini, o1-mini, GPT-4o
Current org
Meta MSL
Schools
2
Articles
0
Videos
1
Links
Career path
PKU 2018, Stanford PhD
Internships at Microsoft, Nvidia, Google, Apple
Ex-OpenAI (creator o3-mini, o1-mini)
Profile
REN Hongyu (任泓宇) joined Meta Superintelligence Labs in June 2025. He earned his B.S. from Peking University and Ph.D. from Stanford.
At OpenAI, he was post-training lead for o3, o4-mini, o1-mini, and GPT-4o. He received the Apple PhD Fellowship, Baidu PhD Fellowship, and Masayoshi Son Foundation Scholarship.
Known for
Meta MSL researcher (Jun 2025)OpenAI post-training lead: o3, o4-mini, o1-mini, GPT-4o
Education
Stanford
Ph.D. in CS
Peking University
B.S. in CS (Honors)
Articles / interviews
Profile links