By Dave Majumdar, The National Interest: “...Among these weapons are the Status-6 nuclear-powered intercontinental range torpedo and a new nuclear-powered nuclear-tipped cruise missile.”
From the description, Putin is most likely talking about the RS-28 Sarmat intercontinental ballistic missile. Its NATO codename name is SS-X-30 Satan 2.
Reports of Russia’s new missile have been circulating for years, and Putin's engineers are not alone. Russia, the United States, and China have all dedicated time and money to hypersonic missiles. U.S. tests have ended in crashes, revealing a fundamental flaw in the missile’s ability to steer or even remain in control at ultra-high speeds. Nevertheless, these missiles can strike targets anywhere in the world within a few minutes, a promise too tantalizing to ignore. The idea that they can carry nukes or conventional weapons is a worry for those who fear an accidental nuclear exchange.
What does this do to the calculus of mutually assured destruction? In one way, not much. Any attack from Russia today would overwhelm the limited number of U.S. interceptors. The idea that Putin can use missiles to destroy America is nothing new