As of: 2026-10-09 19:24 CEST.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code). Human editor: Adam Bicz.
Canonical page: https://postcutoff.com/p/x-theo-2102877145399975952/

# “Opus 5.5 had the best run with FishSlop that I’ve ever seen.”

Theo - t3.gg (@theo), X, 2026-09-23.
Source: https://x.com/theo/status/2102877145399975952

## Archived text

> Opus 5.5 had the best run with FishSlop that I've ever seen.
> 
> The animation quality is incredible. The controls feel so much better than any other version I've generated. There's even a complete gameplay loop with a functional in-game economy and unlocks.
> 
> > Quoting @theo: GPT-6 Astra is world class at Blender and 3 dimensional reasoning. This was a 1-shot game it created, all running in browser.

Archived 2026-10-09 via fxtwitter (unofficial).
Counts: 109,629 views, 1,523 likes, 19 reposts, 73 replies (at fetch time)
Media: https://video.twimg.com/amplify_video/2102876576719536128/vid/avc1/2856x2160/e5fVT5YPvKVsUejH.mp4?tag=29

## Cited in

- Video: [Theo's 'FishSlop' fish-tank game test: Opus 5.5's best run](https://postcutoff.com/v/theo-opus-5-5-fishslop-game-x/)