Modelpeers

Nano Banana 2 (Gemini 3.1 Flash Image) and Banana Pro (Gemini 3 Pro Image)

2 models from Google

Retiring

Nano Banana image models go GA, preview IDs to shut down June 25

Google released GA versions gemini-3.1-flash-image and gemini-3-pro-image and announced that the -preview model IDs would shut down on June 25, 2026.

Who is affected:
Apps calling gemini-3.1-flash-image-preview or gemini-3-pro-image-preview.
Action needed:
Switch to the GA model IDs before June 25, 2026.

Source

"The gemini-3.1-flash-image-preview and gemini-3-pro-image-preview models are deprecated and will be shut down on June 25, 2026."

Google Gemini API release notes

Published

Open the sourceai.google.dev

Modelpeers tracks changes to AI agents and models, each from its source. Follow Nano Banana 2 (Gemini 3.1 Flash Image) to get a weekly email when it changes.