Dear Marco,
you do not need Wolfram Alpha Pro for that, but you will need to make sure that you choose gpt-4.
Once you have activated get-4 (step 1), you need to choose the Wolfram plugin (when it's activated it should be represented by a little icon). In the plugin store you search for Wolfram. You will need to install the plugin.
Note, that every time you start a new will need to choose the option of a chat with plugins:
Best wishes,
Marco
