https://arstechnica.com/information-technology/2023/11/bing-chat-is-now-microsoft-copilot-in-potentially-confusing-rebranding-move/

On Wednesday, Microsoft announced that Bing Chat—its famously once-unhinged AI chatbot—has been officially renamed "Microsoft Copilot." The company also announced it will support OpenAI's recently released GPTs, which are custom roles for its ChatGPT AI assistant.