Stephen Hawking's IQ is 160 which is considered genius level and is around the same IQ level as Albert Einstein.
Stephen Hawking was an English theoretical physicist and cosmologist, who revolutionized our understanding of the universe.
Stephen Hawking's work on the black holes, the Big Bang and the origins of the universe also laid the foundation for modern understanding and Stephen Hawking is also best know for discovering that black holes emit radiation.
Stephen Hawking was born January 8th 1942 in Oxford, United Kingdom and died March 14th 2018 in Cambridge, United Kingdom at age 76.
Albert Einstein's IQ is around 160, which is considered a genius level IQ.
The 160 IQ number is largely derived from Albert Einstein's achievements in physics and in 1905, Albert Einstein published 4 papers which laid many of the foundations for the 20th century physics.
Einstein said that Nikola Tesla is who was the smartest person.
Albert Einstein reportedly jokingly said that Nikola Tesla was the smartest person when Albert Einstein was asked about his own intelligence.
Although there's no concrete evidence that says for sure if he did in fact say that.
The quote of "I don't know, you'll have to ask Nikola Tesla, "is often also attributed to him in this context, but it's also likely a fabricated story that has been passed around.
There are not sources that are reliable to prove that Albert Einstein said this, such as in diaries, letters or interviews which document that Albert Einstein said this about Nikolas Tesla.
Both Tesla and Einstein were brilliant scientists, but they didn't particularly admire each other's work, especially when it came to the topic of relativity.
The quote from Albert Einstein about Nikola Tesla being the smartest person also appears to have actually originated as a popular anecdote, and may have been potentially embellished over time.
It's a good story that does play on the idea of Albert Einstein's humility and Nikola Tesla's genius, but there's no historical basis to confirm it.