Lobe pump test: Gemini 4 Argon's rotors look like propellers
Same prompt to Claude Opus 5.5, GPT-6 Astra, Grok 4.7 and Gemini 4 Argon to build a lobe pump; the author says Gemini's four-blade rotors look like propellers.
four AI models built a pump. only some of them built something that could actually move water 💧 same prompt, same machine: Claude Opus 5.5 · GPT-6 Astra · Grok 4.7 · Gemini 4 Argon a lobe pump is brutally honest. two rotors turn against each other, trap fluid in the pockets between the lobes and the wall, and carry it around to the other side. the point where the lobes meet is the seal. if they don’t mesh, nothing gets pushed. the water just sloshes. so watch the rotors, not the colors: → Opus: visible shaft hubs, rotors that look like they’re working against each other, particles piling up along the sides → Astra: the most polished render, with a glowing ring of fluid hugging the housing wall → Grok: two clean orange triangles, almost no fluid and barely any detail → Gemini: four-bladed rotors that look more like propellers, with streams entering and leaving through diagonal channels one of these looks like a machine. one looks like a screensaver. and the prettiest one isn’t necessarily the one that pumps. I’m not scoring them. watch the contact point between the rotors and tell me: which one is really pumping, and which one just animated?