WordPress 6.8 RC3 is available for testing but should not be used on live sites. Recommended testing methods include the Beta Tester plugin, direct download, WP-CLI command, or WordPress Playground. The official release is targeted for April 15, 2025. Users can contribute through testing, reporting vulnerabilities (with doubled rewards during this phase), updating themes/plugins, and translating into multiple languages.
https://wordpress.org/news/2025/04/wordpress-6-8-release-candidate-3/