Military sources report that the Su-57M is now being used deep behind enemy lines in Ukraine, although it was previously expected to be ready no earlier than 2025. However, with the recent reshuffling in the Russian Ministry of Defense (MoD), as well as a massive increase in defense spending and the mobilization of the Kremlin’s world-class military industry, it’s very possible that the program has been sped up significantly and that the new variant is already being used in combat operations.