When ChatGPT hyped its new super-smart GPT-4o AI back in May, its technical details were upstaged by the smart new chatbot's extraordinarily human-like voice. But that voice turned out to be just a little too similar to that of actress Scarlett Johansson, causing its own mini digital drama, which prompted OpenAI to delay rolling out the new "advanced voice mode" system. After some safety upgrades and a less familiar-sounding voice, the system is ready for public release to all paying OpenAI users.