Retirement for preview models for 2.5 Flash, 2.5 Flash-Lite, and 3.1 Flash-Lite

Retirement for preview models for 2.5 Flash, 2.5 Flash-Lite, and 3.1 Flash-Lite

The following preview model endpoints have been retired and are no longer accessible:

• gemini-2.5-flash-lite-preview-09-2025 • gemini-2.5-flash-preview-05-2025 • gemini-3.1-flash-lite-preview

See Migrate to the latest Google models for information on how to migrate your project.