Meta's Chief AI Officer Alexandr Wang joined Y Combinator in the summer of 2016 when Sam Altman was president
OpenAI CEO Sam Altman lived with Scale AI co-founder and current Meta Chief AI Officer Alexandr Wang in San Francisco for several months during the COVID-19 pandemic, at Wang's apartment in South of Market.
Multiple reports, including The Information, The Wall Street Journal, and Wikipedia, have confirmed this. At the time, Altman was about 35 years old (born in 1985), and Wang was about 23 years old (born in January 1997). Scale AI entered Y Combinator under Altman's leadership in 2016.
The Information reported that during Wang's 24th birthday party at the apartment in January 2021, Altman attended and worked at a desk for part of the time. The apartment features a private terrace of about 2,000 square feet and a hot tub overlooking the San Francisco skyline.
The two have maintained a long-term personal friendship. Altman has publicly joked that Wang is too social, saying, "No one goes in and out of parties more than you." Reports from Straits Times and others also mentioned that Wang was once Altman's roommate and that Altman advised him to reduce his social intensity.
During the time Wang lived with Altman during the pandemic, Scale AI was providing data labeling services for AI labs like OpenAI, establishing a client relationship between the two. They continued to interact at industry events and private occasions.
Market Mechanism: During the pandemic, AI entrepreneurs formed a close living and social network in San Francisco, driven by shared space and industry connections under lockdown; capital and client relationships extended from early connections in Y Combinator to data labeling suppliers and model companies, benefiting Scale AI (which gained clients and network resources like OpenAI) while putting pressure on entrepreneurs lacking such early living and accelerator connections (facing disadvantages in network density).
Source: Public information
ABAB AI Insight
Sam Altman established a connection with Alexandr Wang's Scale AI during his leadership at Y Combinator, where Scale entered in 2016; during the COVID-19 pandemic, the two lived together for months in Wang's San Francisco apartment, with Altman around 35 years old and Wang around 23 years old. Altman later became CEO of OpenAI, and Wang founded Scale AI and became Meta's Chief AI Officer.
In the summer of 2016, 19-year-old Alexandr Wang and co-founder Lucy Guo entered Y Combinator (YC S16 batch) under Sam Altman's presidency.
The two initially applied to YC with other ideas (including an app similar to doctor appointments) and pivoted to data labeling after receiving feedback during the batch, ultimately founding Scale AI. Altman, as the head of YC, had institutional contact with the batch companies.
Afterward, the two maintained a personal friendship, and during the pandemic, Wang and Altman lived together in Wang's apartment in San Francisco. Scale AI subsequently became a data labeling supplier for labs like OpenAI, forming a commercial relationship.
In terms of capital pathways, the early YC connection and living together during the pandemic placed the two in the same living and social network, with Scale later providing data labeling services to labs like OpenAI, establishing client relationships; Wang subsequently solidified his industry position through intensive socializing, and Altman publicly commented on his social intensity, reflecting the path from accelerator to supplier to a senior position at Meta.
Analogously, this is similar to historical cases of Silicon Valley entrepreneurs forming tight networks through co-living or accelerators in early stages, where some YC batch members later became clients or partners in the AI field; currently, we are in a stage where AI talent and data infrastructure are concentrating from early connections to large labs and platform companies.
Essentially, this represents a network reconstruction under capital concentration: through accelerators and co-living during the pandemic, young founders were placed in the same space as mature operators, allowing data labeling companies to gain model company clients and sustained visibility, with the mechanism being that living and social density reduces information and trust costs, accelerating the transition from early connections to commercial relationships and industry positions.
ABAB News · Cognitive Law
Co-living during the pandemic turned accelerator connections into a sustained industry network.
Living together at 23 and 35 led to subsequent client and executive roles.
Founders with high social density are more likely to gain clients and capital.