Yes, totally different. If you use windows, there’s a pane in their Edge browser that opens up an AI chat window. You can use it for most of the things you get with paid OpenAI subscription, but it’s free for every windows user. They call it Copilot.
Most recent major feature release has it now (I don’t know what they call them anymore) but it showed up in my taskbar after an update maybe just over a month ago.