When OpenAI developed software powerful enough to write hyper-realistic fake news, it decided not to release it to the public for fear it could be exploited. But then, two graduates built a version of the program using the original code, prompting debate on ownership in the murky world of open-source code

Sam Altman, who will now transition into the role of chairman, has transformed Y Combinator into a global powerhouse during his five-year tenure as president