# What to Do Before Gemini 2.5 Pro and 2.5 Flash Are Retired on December 1, 2026

Source: [DEV Community: python](https://dev.to/aideprecations/what-to-do-before-gemini-25-pro-and-25-flash-are-retired-on-december-1-2026-5gg9) · 2026-11-10 · Languages
Page: https://themorning.dev/story/what-to-do-before-gemini-2-5-pro-and-2-5-flash-are-retired-on-december-1-2026-fd99b7e6b5edf380
Kind: other · Impact: medium

## In 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.

## What to do

- Check the billing impact of the automatic routing to the new models' rates before December 1, 2026

## Versions

- gemini-2.5-pro
- gemini-2.5-flash
- gemini-3.8-flash
- gemini-3.5-flash-lite

## Timeline

- 2026-12-01: gemini-2.5-pro and gemini-2.5-flash retired; requests routed to successor models

## Coverage

- [What to Do Before Gemini 2.5 Pro and 2.5 Flash Are Retired on December 1, 2026](https://dev.to/aideprecations/what-to-do-before-gemini-25-pro-and-25-flash-are-retired-on-december-1-2026-5gg9) — DEV Community: python, 2026-11-10

Tags: gemini, google, llm, api, deprecation

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Brief generated by AI (claude-haiku-5-5) from the reporting listed under Coverage. Headlines belong to their publishers. The Morning Dev – https://themorning.dev