Gemini API model deprecations

How Gemini API retires models

Google announces Gemini API deprecations in its release notes and tracks the shutdown dates on its deprecations page. Those dates are the earliest a model might be retired: Google says it tells users the exact day with advance notice. Once a model is shut down, it is completely turned off and its endpoint is no longer available.

A deprecated model can leave Google AI Studio before it leaves the API. gemini-2.5-pro and gemini-2.5-flash can no longer be picked in AI Studio, and the API serves them only to existing users who have used them before. Not every deprecation ends in an error either. From December 1, 2026, calls to gemini-2.5-pro are routed to gemini-3.8-flash and calls to gemini-2.5-flash to gemini-3.5-flash-lite, each billed at the new model’s rates. Some older names, such as gemini-3.7-flash, already route to a newer model instead of shutting down.

Next shutdowns: gemini-2.5-flash-native-audio-preview-12-2025 on November 17, 2026, gemini-2.5-flash-preview-tts on November 17, 2026, gemini-2.5-pro-preview-tts on November 17, 2026.

What Gemini API answers a call to gemini-omni-flash-preview since October 22, 2026, as recorded from real responses:

{"error":{"code":404,"message":"This model models/gemini-omni-flash-preview is no longer available to new users. Please update your code to use a newer model for the latest features and improvements.","status":"NOT_FOUND"}}

{"error":{"code":404,"message":"models/gemini-omni-flash-preview is not found for API version v1beta, or is not supported for generateContent. Call ModelService.ListModels to see the list of available models and their supported methods.","status":"NOT_FOUND"}}

Policy read on Gemini API's pages on November 5, 2026. Okapi last checked Gemini API's model pages on November 6, 2026.

• Gemini deprecations aistudio.google.com/docs/deprecations