gemini-1.5-flash-8b model retirement
Stopped workingSubscribe to Gemini APIShare
On September 29, 2025, model gemini-1.5-flash-8b stops working. Calls targeting this model fail after this date. Gemini API shut down the model alongside other Gemini 1.5 offerings.
The error you get
What Gemini API answers a call to gemini-1.5-flash-8b once the model is gone, as recorded from real responses:
{"error":{"code":404,"message":"This model models/gemini-1.5-flash-8b 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-8b 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-8b
Move to a current Gemini model.
In Gemini API's words
The following Gemini 1.5 models are now shut down: gemini-1.5-pro gemini-1.5-flash-8b gemini-1.5-flash
Facts
- API
- Gemini API
generativelanguage.googleapis.com - Model
gemini-1.5-flash-8b- Kind
- Model retirement
- Takes effect
- September 29, 2025
- Calls after that day
- Fail
- Source
- Announcement
- Last updated
- Verified
- , against Gemini API's own pages
Questions
When does gemini-1.5-flash-8b shut down?
Calls to the model gemini-1.5-flash-8b 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-8b return once it is shut down?
Gemini API answers HTTP 404: "This model models/gemini-1.5-flash-8b 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.