American entrepreneur who co-founded Loopt, ran Y Combinator as president (2014–19), and became CEO of OpenAI — releasing ChatGPT (2022) and GPT-4 — making him the most prominent face of the AI revolution and the central figure in debates about AI safety and deployment.
Deployed AI to the general public at scale — OpenAI under Altman's leadership (ChatGPT's release in November 2022) triggered the broadest public engagement with AI in history; his decisions about deployment pace, safety trade-offs, and commercial strategy are shaping the trajectory of the most consequential technology in decades.
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