You can definitely get it to make a custom 3D engine easily. I asked Gemini 3.1 ...

qingcharles 31 days ago | parent | context | favorite | on: What to learn to be a graphics programmer

You can definitely get it to make a custom 3D engine easily. I asked Gemini 3.1 Deepthink (or whatever the Ultra version is called) to make me a 3D engine that ran in CGA on 8086 XT in x86 assembler, and it one shot it perfectly with filled polys, backface culling etc.