Workspace "Viewing" Members access Semantic Model

Hi,

Relatively new to powerBI. Have created and published reports, with imported excel tables via a local drive. Have noticed the semantic model on the online workspace, can all viewers of the workspace access this? The data is sensitive, so would only want them to view the report and not the data sets in the semenatic model. 

Am I able to restrict access to this and still allow them to see the report?

thanks.