The first prototype of the SU-76I ("I" stands for "foreign" in Russian) was created in March of 1943 on the basis of the captured German StuG III and Pz.Kpfw. III vehicles, and featured the Soviet 76-mm F-34 gun. A total of 200 vehicles were manufactured. The SU-76I participated in combat actions until the summer of 1944 and was used for training purposes until the end of the war. The SU-85I was supposed to become the next stage of vehicle development.