https://techcrunch.com/2023/11/15/bing-chat-is-now-copilot/

Everything’s coming up Copilot — including Bing.

Today at Ignite, Microsoft renamed Bing Chat, the AI-powered chatbot it launched on Bing earlier this year, to Copilot. Meanwhile, the premium, corporate-focused version of Bing Chat, which was previously called Bing Chat Enterprise, has been rebranded to Copilot Pro.