Sam Altman was born in St. Louis in 1985 and dropped out of Stanford to co-found Loopt, a location-sharing startup acquired in 2012. He joined Y Combinator in 2011 and led the accelerator from 2014 to 2019, helping to scale a generation of companies including Airbnb, Stripe, Instacart and Reddit, before pivoting full-time to OpenAI, the research lab he had co-founded with Elon Musk and others in 2015.
Under Altman's leadership OpenAI shifted from a non-profit research organization into a capped-profit operating company, raised tens of billions of dollars in compute commitments — primarily through its partnership with Microsoft — and shipped the ChatGPT product that, in late 2022, turned generative AI into a household technology essentially overnight. The cascade reordered priorities in every major technology firm and in many sovereign governments.
His 2023 ouster and immediate reinstatement by the OpenAI board became one of the defining corporate-governance episodes of the decade and continues to shape debate over how frontier-AI labs should be supervised. Altman has since become one of the most active public advocates for AI policy, compute investment and what he calls the 'intelligence age' as a societal phase transition.