Auth.js and NextAuth.js didn't seem to be in a healthy state. Work on NextAuth.js v5 began way back in May 2023.[1][2] NextAuth.js v5 was renamed to Auth.js in August 2023.[3] v5.0.0-beta.0 was released in October 2023.[4] Balázs Orbán, the main contributor to Auth.js and NextAuth.js, quit in January 2025.[5][6] v5 is still in beta after all this time. It never had a stable release.
[1] https://github.com/nextauthjs/next-auth/pull/7443
[2] https://github.com/nextauthjs/next-auth/discussions/8487
[3] https://github.com/nextauthjs/next-auth/commit/a996ab57e8ffc...
[4] https://www.npmjs.com/package/next-auth/v/5.0.0-beta.0
[5] https://github.com/nextauthjs/next-auth/commits?author=balaz...