OpenAI has fired an employee following an investigation into their activity on prediction market platforms including Polymarket, WIRED has learned.OpenAI CEO of Applications, Fidji Simo, disclosed the termination in an internal message to employees earlier this year. The employee, she said, “used confidential OpenAI information in connection with external prediction markets (e.g. Polymarket).”“Our policies prohibit employees from using confidential OpenAI information for personal gain, including...