A demo Andrej Karpathy posted over the weekend stuck with me. He gave Opus 5 a million-token context and the first paragraph of The Lord of the Rings, and asked for a procedural 3D rendering of the scene in Three.js. The model worked alone for about two hours, wrote 5,500 lines, and coordinated polygon placement, camera paths, and animation on its own. Total cost: about $10. The result is faster to watch than to describe.
Most reactions read it as the next step past "draw a pelican SVG" benchmarks. Something else looked bigger to me. What changed isn't the model's artistry. It's the unit of delegation.
The unit of delegation changed
Until now, the work we handed agents came in prompt-sized pieces. One function, one bug, one file. Anything bigger, we decomposed ourselves. The reason was simple: with a small context, the early parts of a long job slide out of view, and coherence goes with them.
A million tokens erases that premise. Everything the model wrote and tried across a two-hour session stays in view. When the desk is big enough, there is no reason to hand work over in slices. Delegation moves from the task to the session.
