Gemini 2.5 Flash
Gemini 2.5 Flash is deprecated and limited to existing users before its scheduled routing change.
Deprecated API; check access details
What the release provides
Google states that requests will route to Gemini 3.5 Flash-Lite from 1 December 2026 and use the replacement model's rates. The legacy model accepts multimodal input and returns text.Gemini 2.5 Flash official API documentation
How to use it well
Practical guidance. Review this migration before the routing date. Compare output formats, tool behavior and billing with the replacement. A request can retain its old model string while receiving a different underlying model, so record the effective release when investigating a changed result.
Specifications & access
| Detail | Value and conditions |
|---|---|
| Status | Deprecated API; check access details |
| Access | API |
| Model identifiers | gemini-2.5-flash |
| Context window | 1,048,576 tokens API input limit; reserve output capacity where the service shares one window. Gemini 2.5 Flash official API documentation |
| Maximum output | 65,536 tokens Published API output limit; request settings can be lower. Gemini 2.5 Flash official API documentation |