Just a model and therefore accurate for no real gas because ideal gas laws were proposed by assuming that 1. The gas consists of large number of molecules which moves randomly and obey newton's laws of motion. 2. The volume of molecules is negligibly small compared to the volume occupied by the gas and no force act on the molecules except during the elastic collision. No real gas obey this properties, except only at high temperatures and low pressures, hence it is accurate for no real gases( ideal gases).
