{"slug":"auth-js","name":"Auth.js","domain":null,"verdict":"As of 2026-07-20, ChatGPT, Claude, Gemini, Grok collectively rank Auth.js #5 of 6 for authentication library for next.js applications. Source: https://modelsagree.com/product/auth-js (modelsagree.com, CC BY 4.0).","best_rank":5,"categories":1,"entries":[{"slug":"best-authentication-library-for-nextjs-applications","title":"Best authentication library for Next.js applications","rank":5,"of":6,"score":7,"appearances":3,"modelRanks":{"Claude":3,"Gemini":3,"Grok":5},"reason":"Still the most widely deployed free option with ~80 OAuth provider integrations, deep Next.js lineage, and enormous community documentation; v5's App Router support and edge-compatible middleware make it serviceable for straightforward OAuth/social-login apps at zero cost","reasons":[{"model":"Claude","reason":"Still the most widely deployed free option with ~80 OAuth provider integrations, deep Next.js lineage, and enormous community documentation; v5's App Router support and edge-compatible middleware make it serviceable for straightforward OAuth/social-login apps at zero cost"},{"model":"Gemini","reason":"Industry-standard free open-source framework with zero subscription costs, edge runtime compatibility, and extensive OAuth provider support. Assumes team values complete deployment autonomy and open-source ecosystems."},{"model":"Grok","reason":"Mature OAuth/social support and open-source foundation; still viable for migrations or very specific provider needs with Next.js; benefits from Better Auth stewardship for security."}],"fixes":[{"model":"Claude","fix":"Maintenance has slowed noticeably and core gaps persist by design — no built-in credentials best-path, weak account management, and confusing session/adapter model; teams needing organizations, MFA, or fine-grained control routinely outgrow it"},{"model":"Gemini","fix":"High setup complexity for custom database schemas and multi-factor authentication alongside ongoing developer friction during the NextAuth v4 to Auth.js v5 transition."},{"model":"Grok","fix":"Maintenance mode with less active innovation; maintainers recommend Better Auth for new projects (not for greenfield apps seeking modern defaults)."}],"updated":"2026-07-20","rank_history":{"days":["2026-07-19","2026-07-20"],"ranks":[3,5]},"api":"https://modelsagree.com/api/v1/best/best-authentication-library-for-nextjs-applications.json"}],"page":"https://modelsagree.com/product/auth-js","check":"https://modelsagree.com/check?q=Auth.js","updated":"2026-07-21T04:28:25.186Z","attribution":"modelsagree.com, CC BY 4.0"}