The Sukhoi Su-35 is a Russian-made, fourth-generation, multi-role fighter aircraft. It is a heavily upgraded version of the Su-27, and is designed to compete with the most advanced fighter jets in the world. It has a top speed of Mach
From Wikipedia
The Sukhoi Su-35 is the designation for two improved derivatives of the Su-27 air superiority fighter. They are single-seat, twin-engine, supermaneuverable, 4.5 generation air superiority fighters, designed by the Sukhoi Design Bureau and built by Sukhoi.