Version 12.0.1, build 21A559.
Monterey drops all support for Ivy Bridge HD4000 and nVidia Kepler. Patches are available to regain graphics acceleration though. This time, Apple raised minimal requirements to Haswell/Broadwell/Skylake graphics depending on platform (MacBook Air/MacBook Pro/iMac/Mac mini/MacBook).
Also released at the same time:
macOS Big Sur 11.6.1 (build 20G224) Security update 2021-007 for Catalina 10.15.7 (build 19H1519)
NB: macOS Mojave is now officially unsupported.