# imagen-4.0-ultra-generate-exp-05-20

Calls to the model imagen-4.0-ultra-generate-exp-05-20 on Vertex AI (us-central1-aiplatform.googleapis.com) stopped working on July 7, 2025.

- API: Vertex AI (us-central1-aiplatform.googleapis.com) (us-central1-aiplatform.googleapis.com)
- Model: imagen-4.0-ultra-generate-exp-05-20
- Kind: Model retirement
- Announced: June 11, 2025
- Takes effect: July 7, 2025
- Calls after that day: fail
- Calls it hits: `model imagen-4.0-ultra-generate-exp-05-20`
- Source: [Changelog](https://docs.cloud.google.com/vertex-ai/docs/release-notes)
- Page: https://www.okapi.bot/models/vertex-ai-2/imagen-4.0-ultra-generate-exp-05-20/

## Vertex AI (us-central1-aiplatform.googleapis.com)'s words

> To avoid service interruption, migrate from imagen-4.0-ultra-generate-exp-05-20 and imagen-4.0-generate-preview-05-20 before 2025-07-07.