Modelpeers
Gemini 3.8 Flash character

Gemini 2.5 Pro and 3.8 Flash

2 models from Google

Retiring

Takes effect Dec 1, 2026 · in 26 days

Gemini 2.5 Pro deprecated, requests route to 3.8 Flash on December 1, 2026

Gemini 2.5 Pro is no longer selectable in Google AI Studio. On December 1, 2026, all API requests to it will route to Gemini 3.8 Flash and be billed at Gemini 3.8 Flash rates.

Before

gemini-2.5-pro served as Gemini 2.5 Pro

After

Requests route to gemini-3.8-flash at Gemini 3.8 Flash rates

Who is affected:
Anyone calling gemini-2.5-pro in the API faces a model swap, new billing and breaking API changes.
Action needed:
Update your model string to gemini-3.8-flash before December 1, 2026 and review the migration guide.

Source

"Effective December 1, 2026, all API requests to gemini-2.5-pro will automatically route to"

Gemini API changelog and deprecations

Published

Open the sourceaistudio.google.com

Modelpeers tracks changes to AI agents and models, each from its source. Follow Gemini 2.5 Pro to get a weekly email when it changes.