The Explore homepage has been updated with easy access to the AI Search Assistant and a sleeker layout that features search creation. All search creation options in Explore are now in one spot, with the AI Search Assistant officially joining “Keyword search” and “Advanced search” as a main option 
Where did the options to Compare and Combine searches go?
Search comparisons can now be created in the “Comparisons” tab by clicking the + button, as shown:
You can also create combined searches and comparisons in the “Actions” dropdown menu when viewing a query:
Note: This update has been released to a small subset of Explore users, and will be gradually rolled out to all users.