Gemini API imagen-4.0-ultra-generate-preview-06-06 model retirement

Stopped workingFebruary 17, 2026Subscribe to Gemini APIShare

Calls to the model imagen-4.0-ultra-generate-preview-06-06 on Gemini API stopped working on February 17, 2026.

The error you get

What Gemini API answers a call to imagen-4.0-ultra-generate-preview-06-06 once the model is gone, as recorded from real responses:

Once it is closed to new API keys: HTTP 404

{"error":{"code":404,"message":"This model models/imagen-4.0-ultra-generate-preview-06-06 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"}}

Once it is shut down: HTTP 404

{"error":{"code":404,"message":"models/imagen-4.0-ultra-generate-preview-06-06 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 imagen-4.0-ultra-generate-preview-06-06

Move to gemini-nano-banana-2.1, recommended by Google.

In Gemini API's words

Model: imagen-4.0-ultra-generate-preview-06-06; Release date: June 24, 2025; Shutdown date: February 17, 2026; Recommended replacement: gemini-nano-banana-2.1

Gemini API, Deprecations page

Facts

API: Gemini API generativelanguage.googleapis.com
Model: imagen-4.0-ultra-generate-preview-06-06
Kind: Model retirement
Takes effect: February 17, 2026
Calls after that day: Fail
Source: Deprecations page
Last updated: November 4, 2026
Verified: November 6, 2026, against Gemini API's own pages

Questions

When does imagen-4.0-ultra-generate-preview-06-06 shut down?

Calls to the model imagen-4.0-ultra-generate-preview-06-06 on Gemini API stopped working on February 17, 2026.

What happens to calls after February 17, 2026?

They have failed since February 17, 2026.

What error does imagen-4.0-ultra-generate-preview-06-06 return once it is shut down?

Gemini API answers HTTP 404: "This model models/imagen-4.0-ultra-generate-preview-06-06 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.

imagen-4.0-ultra-generate-preview-06-06 on other APIs 1

Nov 30, 2025 Vertex AI imagen-4.0-ultra-generate-preview-06-06Model retirement Stopped working

You fixed this one by hand.

Okapi opens the pull request with the fix before the next breaking change reaches your code.

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