gemini-1.5-flash-latest model retirement
Stopped workingSubscribe to Gemini APIShare
Calls to the model gemini-1.5-flash-latest stopped working on September 29, 2025.
The error you get
What Gemini API answers a call to gemini-1.5-flash-latest once the model is gone, as recorded from real responses:
{"error":{"code":404,"message":"This model models/gemini-1.5-flash-latest is no longer available to new users. Please update your code to use a newer model for the latest features and improvements.","status":"NOT_FOUND"}}{"error":{"code":404,"message":"models/gemini-1.5-flash-latest is not found for API version v1beta, or is not supported for generateContent. Call ModelService.ListModels to see the list of available models and their supported methods.","status":"NOT_FOUND"}}What to use instead of gemini-1.5-flash-latest
Move to gemini-3.8-flash. gemini-2.5-flash, 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.). 2.5 Flash is the direct successor, but Google now limits the 2.5 models to users who already used them: a project that never called it cannot move to it, and should take gemini-3.8-flash instead.
Facts
- API
- Gemini API
generativelanguage.googleapis.com - Model
gemini-1.5-flash-latest- Kind
- Model retirement
- Takes effect
- September 29, 2025
- Calls after that day
- Fail
- Source
- models.dev
- Last updated
- Verified
- , against Gemini API's own pages
Questions
When does gemini-1.5-flash-latest shut down?
Calls to the model gemini-1.5-flash-latest stopped working on September 29, 2025.
What happens to calls after September 29, 2025?
They have failed since September 29, 2025.
What error does gemini-1.5-flash-latest return once it is shut down?
Gemini API answers HTTP 404: "This model models/gemini-1.5-flash-latest is no longer available to new users. Please update your code to use a newer model for the latest features and improvements.". Send another model to fix it.
How do I find the calls this hits in my code?
Okapi reads your repository, finds the calls this change hits and opens a pull request with the fix. It never commits to your branches: every change comes as a pull request you review.
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You fixed this one by hand.
Okapi opens the pull request with the fix before the next breaking change reaches your code.