Why is Cauchy the last Gundam?

Cauchy is called the last Gundam because of the latest sharp MS developed by Anaheim Electronics Company for the secret association Mafuti Nabiyou Arryn.

According to the query of Douban film, Cauchy Gundam is a MobileSuit in Gundam Warrior, which was designed and developed by Anaheim Electronics Company for Mafuti Nabiyou Arryn. It is considered as the last Gundam, because it is the latest and most advanced Gundam model in the plot, with excellent performance and technology. As the last Gundam, Cauchy Gundam played an important role in the battle, showing excellent combat capability and adaptability. This makes Cauchy Gundam a key figure in the story, which attracts the attention of the audience and gives it the title of "the last Gundam".