The model of the solar system suggested by Copernicus was a heliocentric model, in which the Sun was at the center of the solar system and the planets revolved around it. This was a significant departure from the geocentric model, in which the Earth was at the center of the solar system, that had been accepted for centuries.
The model of the solar system suggested by Kepler was an improvement on the model proposed by Copernicus. Kepler's model was based on the idea that the planets moved in elliptical orbits around the Sun, rather than circular orbits as proposed by Copernicus. This allowed Kepler to better explain the observed motion of the planets and the discrepancies that had been found in the earlier model.
Today, we use a model of the solar system that combines the ideas of both Copernicus and Kepler, as well as incorporating the laws of physics discovered by later scientists such as Newton. This model accurately predicts the movements of the planets and other objects in the solar system, and is widely accepted by scientists.