Vertex · First-party API

gemini-3.1-flash-lite

ActiveAvailable until at least May 7, 2027

Vertex lists gemini-3.1-flash-lite as active and guarantees it until at least May 7, 2027. That is the earliest it could be retired, not a shutdown date; no retirement is announced. Source: docs.cloud.google.com · checked Oct 23, 2026