Zen 6 is the name for an upcoming CPU microarchitecture from AMD, shown on their roadmap in July 2024. It is the successor to Zen 5 and is believed to use TSMC's 3 nm and 2 nm processes. From Wikipedia
The Zen 6-based CPUs have passed key functional tests, marking a major milestone in AMD's high-performance computing roadmap and U.S. production efforts.