Since ChatGPT debuted in November, hundreds of millions of people have experimented with the online chatbot, which can answer questions, write poetry, draft emails and riff on almost any topic from inside a web browser. On Thursday, OpenAI , the San Francisco artificial intelligence lab behind ChatGPT, unveiled a new version of the chatbot for the iPhone, hoping to build on its enormous popularity. Unlike the browser-based version of ChatGPT, the smartphone app responds to voice commands, operating a bit like Apple’s Siri digital assistant or Amazon’s Alexa. The app does not answer with voice, but generates responses in […]