By skyforbes 
Prompt: Draw a photorealistic d20 — a twenty-sided polyhedral die which is in the shape of an icosahedron, a Platonic solid comprised of 20 equilateral triangular faces. Put a 20 on the top face, which is the face opposite from and parallel to the surface the die is resting on. Make sure every other face of the die has one and only one number in the range of 1 to 19, and no number in that sequence occurs more than once.
Result:
• Geometry: Is an icosahedron. ✅️
• Topology/preposition: Put a 20 on top. ✅️
• Number sequence: All faces have one and only one number on them; no repeats [2, 5, 6, 8, 10, 12, 13, 14, 16, and 20] ✅️
• Numbers: All well-formed numbers, and the 6 even had a bar under it to distinguish it from a 9. ✅️
So Google Gemini crosses the finish line beating out ChatGPT 5.1, which is still struggling with duplicate numbers. 🏁
The d20 test has been vanquished, but I will still be testing others to see if and when they also cross the finish line. And also to see if we have regressions on Gemini.