All of the latest GPT models gave similar responses.Morsa Images/Getty ImagesOpenAI unveiled GPT-4o, its latest generative AI model, on Monday.GPT-4o is available as a text-based chatbot on ChatGPT.Business Insider tested GPT-4o's email-writing capabilities and compared it to older models.OpenAI's newest model, GPT-4o, is predicted to shake up multiple industries, but its email writing skills might need some work.During a flashy display Monday, the company unveiled the latest version of the generative AI model predicted to shake up multiple industries: GPT-4o.GPT-4o is already available as a chatbot on ChatGPT, which many workers use for boring, text-based tasks.