Microsoft has had a lot of naming blunders in the past but this has to be their worst. Copilot is currently, a tool to review PRs on github, the new name for windows cortana, the new name for microsoft office, a new version of windows laptop/pc, a plugin for VS code that can use many models, and probably a number of other things. None of these products/features have any relation to each other.

So if someone says they use Copilot that could mean anything from they use Word, to they use Claude in VS Code.

funny enough I have a page just for tracking this also https://notes.zachmanson.com/microsoft-product-names/