Yesterday before I took the latest Cursor update, I had Gemini 2.5 Pro as an available model, and now after the update all I have access to is the pro-preview-05-06 version.
All versions of Gemini 2.5 Pro are now the linked to the latest 05-06 version.
on this page you can find the copy button after the model name and add this if you do not have any version in your Cursor settings.