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OpenFGA
What ChatGPT, Claude, Gemini & Grok actually say · July 2026
The verdict
OpenFGA appears in 1 AI-ranked category — best position #5 for ai agent authentication tool.
GPT —Claude #3Gemini —
The strongest open-source answer to "which data may this agent touch" — CNCF Zanzibar-style relationship-based authorization that filters what an agent can retrieve or act on per user, self-hostable and free with a managed path via Okta FGA; near-tie with SpiceDB, OpenFGA wins on ecosystem momentum and easier operational footprint.
Where OpenFGA falls short, per the models
- Claude It solves authorization only — no authentication, token handling, or consent flows — and modeling relationship tuples plus syncing them from your source of truth is real engineering work small teams underestimate.
Top alternatives per the models: Arcade · Auth0 · Composio · Descope
Rankings are computed from what the models answer, re-polled continuously · raw reasoning shown verbatim · methodology