Zen 4 is under development and is scheduled for 2021, with production likely happening on the 5nm process. This puts Zen 5 out there somewhere in 2022 at the earliest, probably fabbed on an optimized version of the 5nm node.
The AMD Zen 5 core was confirmed to be in development by AMD a while ago in their slides during the Zen+ launch. It has once again been confirmed by David Suggs, who’s the chief architect for the AMD Zen 2 and Zen 5 microprocessor cores. AMD has teams within the CPU department who are working on different Zen cores in parallel. David, in particular, has been the Chief architect behind the AMD Zen 2 core which recently made its debut with the Ryzen 3000 processors and also, the upcoming Zen 5 cores.
Via: WCCF Tech