LONG CONTEXT

Beyond the Pelican Test: Opus 5 Renders the Lord of the Rings With a 1M-Token Budget

Andrej Karpathy gave Opus 5 the first paragraph of the Lord of the Rings, a 1M-token budget (about $10), and asked for a three.js render. Two hours and 5,500 lines of code later, the model had procedurally built a 3D world - and exposed a real weakness in how agents verify their own work.