When Sam Altman co-founded OpenAI in 2015, the generative AI industry was niche. Altman helped create the tech company with the mission of developing AI for the benefit of humanity, but he has seen massive commercial success with the viral Chat-GPT and splashy new products like Sora and GPT-4o. WSJ looks at how he turned the company from a wonky research lab to a $86 billion unicorn, while walking the thin line between commercial success and utopian ideals.