Google Gemini API · model
imagen-4.0-fast-generate-001 deprecation: shutdown date & replacement
Shut down August 17, 2026
- Provider
- Google Gemini API
- Type
- model
- Announced
- —
- Shutdown
- Replacement
gemini-3.1-flash-image- Source
- Official Google Gemini API notice
Page lists announced earliest shutdown date.
How to migrate off imagen-4.0-fast-generate-001
- Find every place that references it:
grep -rn --exclude-dir={node_modules,.git,dist} "imagen-4.0-fast-generate-001" . - Replace the model ID:
- model: "imagen-4.0-fast-generate-001" + model: "gemini-3.1-flash-image" - Re-run your evals or a sample of real prompts — output style, token usage and pricing can change between models.
- Check config outside code too: environment variables, feature flags, prompt-management tools, and fine-tuned model references.
- Deploy before August 17, 2026, and add the CI scanner so it cannot come back.
Also shutting down on August 17, 2026 (Google Gemini API)
Questions
Is imagen-4.0-fast-generate-001 deprecated?
Yes. Google Gemini API has deprecated imagen-4.0-fast-generate-001. It was shut down on August 17, 2026.
When does imagen-4.0-fast-generate-001 shut down?
August 17, 2026, according to Google Gemini API's official deprecation notice.
What should I use instead of imagen-4.0-fast-generate-001?
Google Gemini API recommends gemini-3.1-flash-image. Switch the model ID and re-test your prompts, since outputs, pricing and limits can differ.
What happens to requests to imagen-4.0-fast-generate-001 after the shutdown?
Requests using the retired model ID fail with an error, so any code still calling it breaks. Update and deploy before the shutdown date.