News
What to Do Before Gemini 2.5 Pro and 2.5 Flash Are Retired on December 1, 2026
DEV · By AI Deprecations ·
The Brief
- Google's Gemini API retires gemini-2.5-pro and gemini-2.5-flash on Tuesday, December 1, 2026.
- From that date, requests to gemini-2.5-pro are routed automatically to gemini-3.8-flash, and requests to gemini-2.5-flash to gemini-3.5-flash-lite.
- Requests are billed at the new model's rates.
Why it matters
Applications still calling the retired models will be switched to different models after December 1, 2026, and billing will follow the new models' rates, which can change costs and output behaviour.
Who’s affected
- Developers calling gemini-2.5-pro through the Gemini API
- Developers calling gemini-2.5-flash through the Gemini API
What to do
- Check the billing impact of the automatic routing to the new models' rates before December 1, 2026
- gemini-2.5-pro
- gemini-2.5-flash
- gemini-3.8-flash
- gemini-3.5-flash-lite
- #gemini
- #llm
- #api
- #deprecation
Shutdown: Tuesday, Dec 1, 2026. Google's Gemini API retires gemini-2.5-pro and gemini-2.5-flash . From that date, requests to gemini-2.5-pro are automatically routed to gemini-3.8-flash and requests to gemini-2.5-flash to gemini-3.5-flash-lite , billed at the new model's rates…
Timeline
DEV Community: python
What to Do Before Gemini 2.5 Pro and 2.5 Flash Are Retired on December 1, 2026
gemini-2.5-pro and gemini-2.5-flash retired; requests routed to successor models