The ‘context window’ – how many characters an AI chatbot can ‘remember’ during a conversation, is key to its capability. That’s getting a big increase for Copilot, via Windows Latest:

Microsoft Copilot’s Notebook supports 16,000 characters, four times more than Bing Chat and ChatGPT Plus. For example, in notebook mode, you can feed the Bing AI up to 16,000 characters of research documents or other content and ask Bing Chat or Microsoft Copilot anything about it.

Copilot Notebook is slightly different than the standard Copilot. Read about those differences here.