Just as with the gömböc. Though the latter balances on only one unstable axis while a D6 die does so on 20 (12 edges and 8 vertices).

Any normal die could also land on an edge.

A sphere is bad, it rolls away. The shape from the article would be better, but it is too hard to manufacture. And weighting is cheating anyway. The best option for a D1 is probably the gömböc, which is mentioned in the article.

I believe you might be confusing Copilot Search with Copilot+? Which is of course different from Copilot Pro though not necessarily entirely distinct.

At least Bing Chat was GPT-4-base with Microsoft's own fine-tuning.