The AI win stunned the gaming community, because bots are generally considered inferior to expert human players. This one from Open AI -- a nonprofit artificial intelligence research firm known mainly for its backing by serial entrepreneur Elon Musk, of Tesla (TSLA) and SpaceX fame -- is a different story, and possibly a cautionary one. Open AI says its mission is to promote "responsible" AI development. Or, as Musk puts it, to ensure that AI doesn't grow unchecked and become the death of humanity. Musk said Saturday via Twitter that AI is "more [of a] risk than North Korea."