Linux 6.1 LTS is now the default kernel on Raspberry Pi OS 2023-05-03, while also featuring updated components including a new 64-bit Mathematica build, Chromium 113, RealVNC and VLC.
Raspberry Pi OS is a free operating system based on Debian, optimized for Raspberry Pi hardware. This latest version offers 64-bit support and is available for all Pi 3, 4, and Zero 2 boards.