Because of the need to train pilots to operate such an unusual aircraft as the mig-25, a training version of the new mig was developed and tested. The prototype was developed on the basis of the interceptor. Interest in the twin was also expressed by the customer – air defense aviation. Officially the plane was created by the decision of the military-industrial commission under the ussr council of ministers dated july 7, 1965

The nose part of the plane up to spar number 1 was redesigned to place there the instructor cabin

Series production of mig-25pu began in 1970 in gorky, which continued until 1985. In total, about 180 copies of these machines were produced