Two Hungarian Gripen fighter jets were scrambled on September 25 from Šiauliai Air Base in Lithuania as part of NATO’s Baltic Air Policing mission, NATO Air Command reported on September 25.
The jets intercepted a formation of Russian aircraft—including a Su-30, a Su-35, and three MiG-31s—flying near Latvian airspace.
Not sure of the reliability, but this article gives some good indicators about just how capable the Gripen is. In close-range dogfighting I’m not sure anyone really knows who’d come out on top, but in controlled environments the Gripen seems to perform impressively well.