PHP 8.1 is now available in Beach and Local Beach. Given the new features it provides and the improved overall performance, it is really worth trying it out.
How to use it in Beach
For your instance switch the PHP version to use and deploy again:
How to use it in Local Beach
Simply change the version to use in .localbeach.dist.yaml:
BEACH_PHP_IMAGE_VERSION=8.1
and (re-)start your project.
Important changes
PHP 8.1 itself brings a number of features and a few incompatible changes. You should check out the dedicated PHP 8.1 page, changelog and migration guide if you want to upgrade your project.