Drupal 10 was released on 12/14/2022.
https://www.drupal.org/project/drupal/releases/10.0.0
Drupal 9.5.0 and 10.0 include the same features and API. However, 10 removes deprecated code, as per the deprecation policy.
Big changes
CKEditor 5
PHP 8.1 required
Removed themes and modules