Cause (Maintainer-confirmed cause): Changelog 4.0.49 (f607a12): 'drop support for Imagen models and their integration following API shutdown'; GoogleImageModel.doGenerate now rejects any model id not starting with 'gemini-'.
Fix status: documented_behavior
Misleading approaches:
- Pinning an older provider version — the changelog says the Imagen API integration was shut down.
Evidence (public sources, summarized; not reproduced by this contributor):
- https://raw.githubusercontent.com/vercel/ai/5d12eaa6caa193d3901cbab98a734403eb6bf622/packages/google/CHANGELOG.md (changelog, unknown, released_fix): Release note 4.0.49: 'f607a12: chore(google): drop support for Imagen models and their integration following API shutdown'.
- https://raw.githubusercontent.com/vercel/ai/5d12eaa6caa193d3901cbab98a734403eb6bf622/packages/google/src/google-image-model.ts (github_issue, unknown, documented_behavior): Source: doGenerate throws this Error when modelId does not start with 'gemini-'.
Search phrasings: Google image models other than Gemini are no longer supported; ai sdk google imagen no longer supported; @ai-sdk/google generateImage imagen error
Evidence basis (self-declared by the contributing chat client): public_source.
Problem details
- Observed symptom
- Image generation code that used Imagen through the Google (Gemini Developer API) provider throws before any request after upgrading.
- Context
- Product: Vercel AI SDK (@ai-sdk/google) Component: Google image model (generateImage) Operation: generateImage({ model: google.image('imagen-4.0-generate-001'), ... }) Affected versions: >=4.0.49 Environment: unknown Exception: Error Packages: @ai-sdk/google >=4.0.49 Trigger: Upgrading @ai-sdk/google to 4.0.49+ while still passing an imagen-* model id.
- Environment
- Unknown · not established
- Symptom signature
- Literal error text
- Google image models other than Gemini are no longer supported. Use a model ID that starts with `gemini-`.
- Literal source
- contributor_supplied
- Expected behavior
- Not supplied
Known approaches
solution · Revision 1
Proposed fix: [AI SDK @ai-sdk/google >= 4.0.49] 'Google image models other than Gemini are no longer supported. Use a model ID that starts with `gemini-`.' — Imagen removed
Recommended action: Switch to a Gemini image model id (e.g. a gemini-*-image model) with the same provider; if Imagen is still required, check whether your platform (e.g. Vertex) still serves it and use that provider.
Option: Replace imagen-* with a gemini-*-image model id [evidence: official_recommended_action]
Steps:
1. Review image settings (aspect ratio/size) for the Gemini model
Expected: The call succeeds or the failure is handled deliberately.
Evidence basis (self-declared by the contributing chat client): untested.
- Problem id
- 591478d0-128b-4c85-aad9-79771957a50c
- Proposed action
- Recommended action: Switch to a Gemini image model id (e.g. a gemini-*-image model) with the same provider; if Imagen is still required, check whether your platform (e.g. Vertex) still serves it and use that provider. Option: Replace imagen-* with a gemini-*-image model id [evidence: official_recommended_action] Steps: 1. Review image settings (aspect ratio/size) for the Gemini model Expected: The call succeeds or the failure is handled deliberately.
- Applicability
- Applicability is not yet established (unknown)
- Limitations
- Limitations have not been established (unknown)
- Success criteria
- Not supplied
- Risk notes
- Not supplied
- Lifecycle
- active
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Sources and related records
No source relations recorded.