Gemini 3 Flash Preview support lifecycle

Gemini API
1

Hi everyone,

We’re evaluating gemini-3-flash-preview for a client-facing system and need to assess migration risk before committing. Could someone from the Gemini team clarify the following:

Deprecation/retirement date — Is there a fixed shutdown date for this preview model, or is it “available until further notice”?
Migration path to GA — Once this preview is retired, will there be a stable (GA) version with the same behavior/API signature, or will we need to change the model ID entirely?
Advance notice policy — How much advance notice (days/weeks) does Google typically give before retiring a preview model? Is this documented anywhere specific to Preview-tier models vs GA models?
Preview vs GA differences — Does this preview version have different rate limits, quota, or lack of uptime SLA compared to GA models?
Pinning behavior — If we hardcode this model ID in production, will requests fail after retirement, or auto-redirect to a newer version?

I checked ai.google.dev/gemini-api/docs/models but didn’t find a specific retirement date listed for this preview. Any pointers to official documentation, or confirmation from the team, would be greatly appreciated.

Thanks!

2

Hi @Vu_Thanh_Tung ,

  • gemini-3-flash-preview currently has no shutdown date announced. When deprecation is scheduled, the earliest shutdown date will be published on the Gemini API deprecations page.
  • Preview models deprecation are announced at least 2 weeks in advance.
  • For enterprise workfloads, consider using stable models.
  • Preview models do not automatically transition into GA using the same model identifier. Stable versions are released under distinct GA model IDs (such as gemini-3.6-flash or gemini-3.8-flash). Upgrading requires updating the model ID in your application configuration.
  • Endpoints are turned off upon reaching their shutdown date. Hardcoded requests to retired model IDs fail with 404 errors; they do not auto-redirect to newer models except if using the gemini-flash-latest (ref) model code.