In the USA, the level of the Su-57 fighter was "reduced" to the fourth generation

American analysts published an article about the Russian fighter for the RAND research organization

Su-57. The authors noted that the aircraft “does not qualify” to be called a fifth-generation fighter.

The Lenta publication writes briefly about the analysts’ article.RU". The authors stated that "even fully developed, the Su-57 will likely be similar in performance to another modernized fourth-generation heavy fighter-bomber, the F-15EX, which lacks the stealth capabilities of the F-35 but is equipped with similar avionics."

In general, analysts called the Su-57 an aircraftthe fourth generation, faced with "many problems and setbacks." They came to the conclusion that the fifth generation fighter should not only be inconspicuous, but also have advanced electronic equipment and sensors around the entire perimeter of the glider. So far, only the American F-35 can boast of this.