App made inside Gemini canvas now show error (eg. image generation app)

Gemini API
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1

Hi everyone,

I’m facing an issue with a Gemini-based image reimagination app that was built and running inside the Gemini canvas.

Background:

  • The app was created before Jan 15, 2026

  • It was using the gemini-2.5-flash-image-preview model

  • Everything worked perfectly with no API or authentication errors

Issue:
After Jan 15, 2026, the same app suddenly started failing and now shows an API key / Gemini usage error, even though:

  • The API key has not been changed

  • The codebase and configuration remain the same

  • The app previously worked without any issues

I’m not fully sure why this started happening, but I’ve noticed that many other developers are reporting the same issue around the same timeframe, especially when using image-related Gemini preview models.

Questions:

  1. Was there a breaking change, deprecation, or permission update for gemini-2.5-flash-image-preview after Jan 15, 2026?

  2. Did Gemini recently introduce new API key scopes, billing requirements, or access restrictions for image generation / reimagination?

  3. Is this model now restricted, replaced, or moved out of preview, requiring migration to a newer model?

  4. Are there any official migration steps or announcements explaining this behavior?