Yakovlev built a tactical reconnaissance version, the Yak-125, with a glazed nose replacing the radar, but this did not enter series production. The Yak-26 tactical bomber outgrowth, powered by Tumansky RD-9s, likewise did not go into production. The later Yak-27 had a pointed radome and increased sweepback on the outer wings, while the Yak-27V prototype had a Dushkin rocket in the tail and so equipeed proved capable of "zooming" past 80,000 feet.
Yakovlev Yak -25/26/27/28 (Aerofax) by Yefim Gordon, probably the definitive reference on the type.
An excellent article on a free-flight Yak-25M model with plans
Yak-25 1/72 models for sale