Rerun of Karpathy’s ‘Lord of the Rings’ world-building test with Opus 5.5 and no token cap ($252)
Layton Gott (@Layton_Gott)X108,607 views as of 9 October 2026
Why it is here
Listed in the claudevideo.org community catalog; ~109k views on X by 2026-10-09. Length 2:22.
Made by AI
- Made with
- Claude Opus 5.5
- How we know
- X post (2026-09-25): ‘I just reran Karpathy’s Lord of the Rings experiment with Opus 5.5... Karpathy capped Opus 5 at 1M tokens, around $10. this time I gave Opus 5.5 no token cap at all. same basic setup: > first paragraph of LOTR > let it build the world > let it run for hours and it absolutely destroyed Opus 5. the result looks WAY better. it also burned through $252 worth of tokens lol.’
- Human role
- Same setup as Karpathy’s Opus 5 test (first paragraph of LOTR, let it build the world for hours) but no token cap; ~$252 of tokens.
- Pipeline
- LOTR opening paragraph → Opus 5.5 (hours-long run) → 3D Shire world → 2:22 capture
- Series
- Agent-built game or 3D world (the video shows the result)