"how old is the universe?"

The age of the observable universe is 11 billion years, which is in close agreement with the inflationary model prediction that the age of the universe is two-thirds of the Hubble time.

https://consensus.app/details/billion-years-close-agreement-...

In contrast, when I ask Google "how old is the universe" I get as top result:

26.7 billion years old Current estimates place the Big Bang 13.8 billion years ago. University of Ottawa adjunct professor Rajendra Gupta has calculated that it is, in fact, 26.7 billion years old – nearly twice as old as the current accepted model. extracted from https://cosmosmagazine.com/space/astrophysics/universe-27-bi....