Claude Opus 5.5 Built an RTX Path Tracer on Two RTX 5090s in an Hour

A Reddit user showed that Claude Opus 5.5 created a C++/CUDA path tracer from a single prompt, using NVIDIA OptiX 9.1. The demo runs on two RTX 5090 cards at 34 FPS with 267 million ray samples per second, using SER, NEE and MIS.

• Claude Opus 5.5 wrote the C++/CUDA path tracer in about an hour
• Rendering runs on two RTX 5090s with per-frame row splitting
• Performance: 34 FPS and 267 million ray samples per second
• It uses NVIDIA OptiX 9.1, SER, NEE and MIS