gemini-3.1-flash-image-preview model retirement
Stopped workingSubscribe to Gemini APIShare
On June 25, 2026, the model gemini-3.1-flash-image-preview reached its shutdown date. Requests sent to model gemini-3.1-flash-image-preview fail since that day. This retirement directly affects all calls targeting this preview model identifier.
The error you get
What Gemini API answers a call to gemini-3.1-flash-image-preview once the model is gone, as recorded from real responses:
{"error":{"code":404,"message":"This model models/gemini-3.1-flash-image-preview 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-3.1-flash-image-preview 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-3.1-flash-image-preview
Move to gemini-nano-banana-2.1, which is recommended by Google as the replacement.
In Gemini API's words
Model: gemini-3.1-flash-image-preview; Release date: February 26, 2026; Shutdown date: June 25, 2026; Recommended replacement: gemini-nano-banana-2.1
Facts
- API
- Gemini API
generativelanguage.googleapis.com - Model
gemini-3.1-flash-image-preview- Released
- February 26, 2026 (models.dev)
- Kind
- Model retirement
- Takes effect
- June 25, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
- Verified
- , against Gemini API's own pages
Questions
When does gemini-3.1-flash-image-preview shut down?
Calls to the model gemini-3.1-flash-image-preview stopped working on June 25, 2026.
What happens to calls after June 25, 2026?
They have failed since June 25, 2026.
What error does gemini-3.1-flash-image-preview return once it is shut down?
Gemini API answers HTTP 404: "This model models/gemini-3.1-flash-image-preview 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.
When was gemini-3.1-flash-image-preview released?
gemini-3.1-flash-image-preview was released on February 26, 2026, according to models.dev.
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.
gemini-3.1-flash-image-preview on other APIs 1
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Vertex AI
gemini-3.1-flash-image-previewModel retirement Stopped working
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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.