The author shared this prompt in their post.
design a USB temperature sensor PCB in KiCad.
Grok and Opus given the same task: design a USB temperature sensor PCB in KiCad. Left: Grok 4.7 | Right: Claude Opus 5.5 Grok 4.7 went with a STM32 MCU + MCP9808, 52×24 mm PCB Claude Opus 5.5 did a MCP2221A USB-I²C bridge + MCP9808, 30×26 mm Which would you send to fab?