# Imagen 4 (Retired)

> The API closed on 17 August 2026. Migrate to Nano Banana 2.

Canonical URL: https://allimageai.com/models/imagen-4/

Website: All Image AI

Language: English

Imagen 4 was the workhorse of Google's previous image API, which closed on 17 August 2026. This page stays online so that people still searching the name get an accurate account of where things stand and a migration route, instead of a 404. Its functional successor is the Nano Banana 2 family.

## Model details

- Developer: Google
- Status on All Image AI: Retired
- Last verified: 2026-08-20
- Maximum output: 2K
- Modes: Text to Image
- Reference images: not supported
- Resolutions: 1K, 2K
- Aspect ratios: 1:1, 16:9, 9:16, 4:3, 3:4

## Best for

- Understanding what the model did
- Mapping an Imagen integration onto Nano Banana

## How to use

1. Point calls at Nano Banana 2 (gemini-3.1-flash-image).
2. Imagen's aspect ratio parameter remains compatible on Nano Banana 2.
3. Where you previously added a separate upscaling step, switch straight to the 4K tier.

## Limitations

- Retired — cannot generate

## Pricing and credits

Credits for one image at default quality and mode. Resolution, quality, reference inputs, edit mode and output count can change the total. Check the Generate button before submitting.

| Resolution | Credits / image |
| --- | --- |
| 1K | 2 |
| 2K | 3 |

Failed generations cost 0 credits. Catalog availability does not guarantee runtime availability; the workspace reports whether the selected model can run.

[Credit plans](https://allimageai.com/pricing.md)

## Test results

Testing in progress. No verified benchmark scores have been published for this model.

## Commercial use and image handling

Historical model, documented for reference only.

Uploads are processed by the configured inference service. You can delete a generation from your history.

## Frequently asked questions

### Can I still use Imagen 4?

No, the upstream API is closed. This site will not silently generate with a different model when you select Imagen.

### What should I migrate to?

Nano Banana 2. It covers the text-to-image capability and adds editing and multi-reference.

## Release history and sources

May 20, 2025 — Model announced · web access

This date applies to the event shown. Later API access, weights and availability on All Image AI may have different dates.

- [blog.google](https://blog.google/innovation-and-ai/products/generative-media-models-io-2025/)

[Event evidence on the timeline](https://allimageai.com/timeline/#event-imagen-4)