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/v/stravant-opus-5-5-yu-gi-oh-full-rules-x/

# Yu-Gi-Oh duel with full rules enforcement and an AI opponent, made by Opus 5.5 in two shots

Stravant (@Stravant), 24 September 2026, X. 117,265 views as of 9 October 2026.
Kind: Made by AI.
Watch: https://x.com/Stravant/status/2103022003863355796

## Why it is here

Listed in the claudevideo.org community catalog; ~117k views on X by 2026-10-09. Length 0:49.

## Made by AI

- Made with: Claude Opus 5.5
- How we know: X post (2026-09-24): 'More Opus 5.5 fuel for the fire. YuGiOh with full rules enforcement + AI opponent + resumeability from arbitrary game state. I thought this would be too much to one shot. Technically two-shot, "Make sure every single that that changes has an animation".'
- Human role: Two prompts (second: 'Make sure every single thing that changes has an animation').
- Pipeline: Opus 5.5 → browser card game → 49-second capture
- Series: Agent-built game or 3D world (the video shows the result)

## Related

- 2026-09-22: [Anthropic releases Claude Opus 5.5](https://postcutoff.com/e/2026-09-22-claude-opus-5-5/)