The first ITP prototype (M-1) was completed in October 1941 with a 1300-horsepower M-107P engine. Due to German attacks, the aircraft was evacuated to Novosibirsk and did not make its first flight until 23 February 1942. The M-107P engine proved unreliable and was changed to a M-107A in late 1942. Flight testing was not completed because the airframe was used for ground static testing but the estimated maximum speed at 6300 metres was 655 km/h.

The second ITP prototype (M-2) was built in 1942 and fitted with a Mikulin AM-37 engine which also proved unreliable and was replaced with a 1800 hp Mikulin AM-39 that December. It first flew on 23 November 1943 but the manufacturer's flight tests were not completed until June 1944. Since several other aircraft with about the same level of performance were already available, it was not placed into production.