DeprecationDeskforced-migration deadlines

Google Cloud

Vertex AI Extensions switched off after November 26, 2026

19 days left — Nov 26, 2026

What stops working
Google's managed tool-calling framework for Gemini (Vertex AI Extensions) is deprecated with a six-month window and switched off after November 26, 2026.
Who is affected
Gemini apps on Vertex AI that call tools through Extensions.
Official migration path
Google points to the Agent Platform.
What the official path does not cover
Extension definitions and auth bindings must be rebuilt on the replacement; no converter is listed.
Source
Google Cloud deprecation notice, as summarised by killedbyai.net — verify on the Vertex AI deprecations page · announced 2026-05 · verified 2026-11-07

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