# Design Arena says Gemini 3.8 Flash output degraded within a month

> Original title: Models can seemingly degrade over time.

- Source: Design Arena
- Published: 2026-10-25T16:28:00.000Z
- Bad Influence: https://badinfluence.news/items/enu6zmp5lp8q02henombvgu2p
- Original: https://x.com/DesignArena/status/2114393549189833174

## Summary

Design Arena says Google's Gemini 3.8 Flash produced a noticeably worse 3D scene for the same prompt about a month after release than it did three days after. The share of objects never visible on camera rose from 18% to 57%, and bushes placed underground rose from 0% to 100%. The post presents the two generations as evidence that the model's output degraded over time.

## Post

Models can seemingly degrade over time.

The following scenes were created with the same prompt and the same model, @GoogleAI's Gemini 3.8 Flash, by a user on DesignArena. 

The first was generated just 3 days after release, while the second came almost a month later.

The difference is striking. The first scene features a finished bungalow with terraced gardens, while the second is barely recognizable. 

Digging into the code, we find that the second scene still attempts to build the garden, windows, and patio, but buries much of it beneath its own terraces.

In aggregate, the share of objects never visible on camera jumps from 18% to 57%. For bushes, the share placed underground jumps from 0% to 100%, and even the house walls go from fully above ground to 64% below it.

Both scenes share the same simple user request, yet a few weeks after release, the model struggles to fulfill it. Try making your own generations and judge for yourself at http://DesignArena.ai!

[Video](https://badinfluence.news/api/img-proxy?u=https%3A%2F%2Fpbs.twimg.com%2Famplify_video_thumb%2F2113899248832094208%2Fimg%2FyqInc7pPFudT3KFx.jpg&mode=thumb&exp=1793923200&sig=0a8bbfb0c168182f)