Sam Altman is co-founder and CEO of OpenAI and a startup investor who has backed Helion's fusion-energy work, including its 2025 financing. Before OpenAI, he led Y Combinator and co-founded Loopt. He writes about technological progress, intelligence, energy, startups and decisions that shape the future. He also co-founded Worldcoin.
Sam Altman is co-founder and CEO of OpenAI and a startup investor who has backed Helion's fusion-energy work, including its 2025 financing. Before OpenAI, he led Y Combinator and co-founded Loopt. He writes about technological progress, intelligence, energy, startups and decisions that shape the future. He also co-founded Worldcoin.