# gemini-1.5-pro-latest

Calls to the model gemini-1.5-pro-latest on Gemini API stopped working on September 29, 2025.

- API: Gemini API (generativelanguage.googleapis.com)
- Model: gemini-1.5-pro-latest
- Kind: Model retirement
- Takes effect: September 29, 2025
- Calls after that day: fail
- Calls it hits: `model gemini-1.5-pro-latest`
- Source: [models.dev](https://modeldeprecations.dev/api/v1/models.json?provider=google)
- Page: https://www.okapi.bot/models/gemini-api/gemini-1.5-pro-latest/

## What to use instead

Move to gemini-3.8-flash. gemini-2.5-pro, also named, is closed to some callers (Google: "we are limiting access to the 2.5 models to users who have actively used them in the past." Projects that already called it keep it; new projects are told to use 3.5 Flash-Lite or 3.8 Flash.). Google now limits the 2.5 models to users who already used them, so a project that never called 2.5 Pro cannot move to it; take gemini-3.8-flash instead. 2.5 thinks before answering by default, so budget with thinkingConfig rather than 1.5-era numbers.