Ferrari's two drivers will be "free to race" in 2020.
But he said: "If you look at the last races, they have been free to race and I think that is how we are going to start the next season."
Quadruple world champion Vettel started 2019 as the clear number 1 driver, but Binotto said 22-year-old newcomer Leclerc "surprised everyone".
"He is fast, he manages pressure, he is good in fights, he is good in the races - I am very happy with him," he said.
"Getting seven pole positions and two wins in his first year and finishing ahead of Sebastian in the championship is a great achievement.
"Obviously we are not happy with the performance of the car and some mistakes that we made, including reliability issues and some decisions, but now we have to move forward," Italian Binotto added.