The Cray -4 is a supercomputer that was designed by the American company Cray, under the direction of Seymour Cray, which, however, before completion of the work was killed in a car accident. The Cray -4 is the evolution of commercial failure Cray -3, a supercomputer with gallium arsenide circuits, ie the GaAs chip. In 1994, presented supercomputer based on a vector processor with shared memory.

A standard system with 16 processors and 1,024 Mega Word (8 MiByte ) memory, which contributed 32 gigaflops, was offered in 1995 for $ 11 million.