Russia's attempt to produce a fifth-generation fighter, the Sukhoi Su-57, has apparently not been too successful in technical terms; the aircraft is reputedly not nearly as "stealthy" as it needs to be when measured against the US F-22 Raptor. Also, Russia has announced that it won't put the aircraft into mass production, probably because it can't afford it in large numbers. Nevertheless, it's probably a pretty capable "Generation 4½" fighter, and a dozen will be built for the Russian Air Force.
Recently an air-to-air photo shoot was held for the Su-57. An Antonov An-12 transport (similar to the US C-130 Hercules) was the camera plane. It lowered its rear ramp, and photojournalists were able to film two Su-57's as they approached and passed beneath it. It's very interesting up-close-and-personal footage.
Looks like an interesting aircraft. I'd like to read an independent evaluation of its performance . . . but I guess that's unlikely to be available anytime soon.