LLM model shutdown · Google
When does gemini-2.5-flash shut down?
Google (Gemini API) lists gemini-2.5-flash with routing to gemini-3.5-flash-lite from 1 Dec 2026 (not a shutdown). Google (Vertex AI) lists gemini-2.5-flash with a shutdown date of 20 Oct 2026, which has passed. The provider’s pages are quoted below.
What the provider’s page says
Google · Gemini API
Not a shutdown: from 1 Dec 2026 the provider routes requests to gemini-3.5-flash-lite.
Replacement the provider names: gemini-3.5-flash-lite (gemini-2.5-flash is no longer available in Google AI Studio; effective December 1, 2026, API requests to gemini-2.5-flash will automatically route to gemini-3.5-flash-lite)
Gemini 2.5 Flash models: gemini-2.5-flash | June 17, 2025 | December 1, 2026 | gemini-3.5-flash-lite (gemini-2.5-flash is no longer available in Google AI Studio; effective December 1, 2026, API requests to gemini-2.5-flash will automatically route to gemini-3.5-flash-lite)
Source: ai.google.dev/gemini-api/docs/deprecations, read 13 Nov 2026
Google says the dates in its table are the earliest possible shutdown dates and that it will give the exact date with advance notice. Where a row says requests route to the replacement, the endpoint is not shut down. Rows under Deprecated models or Deprecated agents are listed by Google as already shut down.
Google · Vertex AI
Shutdown date passed: 20 Oct 2026.
Replacement the provider names: gemini-3.8-flash or gemini-3.5-flash-lite
Gemini models: gemini-2.5-flash | June 17, 2025 | October 20, 2026 | gemini-3.8-flash or gemini-3.5-flash-lite
Source: cloud.google.com/vertex-ai/generative-ai/docs/learn/model-versions, read 13 Nov 2026
Google says retirement timelines may be extended but will not be moved earlier than the date listed. A date with 'or later' is a minimum availability date, not an announced retirement.
Check your own code
The model shutdown checker finds every model ID in code or a config file that has a row, counts the days from today and shows the same quotes. Nothing you paste leaves your browser. The Breakage Calendar lists the dates we track for other releases and shutdowns.
This page quotes the provider’s table. It does not say that a move to the replacement was tested, and the replacement may behave differently or take different parameters. Run your own tests before you change a model ID.