Opus 5.5 built an interactive lens optics lab in one 86-minute shot for $25.66
nikola_mr64990 · x · 2026-09-30
Prompted to explain camera focus by building an interactive lens lab, Opus 5.5 delivered "The Plane of Focus" in a single 1h26m run at $25.66 in API cost.
The resulting web app opens up a lens to show how the plane of focus sweeps through a scene: dragging the focus ring shifts the glass elements, changing aperture (f/2-f/16) visualizes depth of field via the circle of confusion, and an exploded view reveals the optical assembly. It also explains inverted image projection and ships with keyboard shortcuts and cinematic cameras. A striking example of frontier coding models one-shotting complex interactive educational apps.
More from coding & agent
- Dev warns: running agents that know your whole life on someone else's computer — SuhailKakar · 2026-09-30
- Implementing Agent Skills: three loading decisions worth separating — ialijr · 2026-09-30
- HireZero: an OpenClaw hackathon build of a review-first AI marketing employee — _raydeStar · 2026-09-30
- Cutting a RAG app to two model calls, and the TTFT problem that remains — Bulky_Ring_244 · 2026-09-30
- GPT-6.1 Sol impresses at reverse-engineering a compiled game, at a fraction of the cost — haider1 · 2026-09-30
- CLM ships Day 1 support for Pi-agent via one npm install — RulinShao · 2026-09-30