GPT-6.1 Terra (max) solved level 13 on a 3×3 in 90 moves

What the model saw

Each picture is the exact image the model was sent; highlighted: start.

startafter turn 1 · 9 movesafter turn 2 · 18 movesafter turn 3 · 18 movesafter turn 4 · 26 movesafter turn 5 · 34 movesafter turn 6 · 38 movesafter turn 7 · 46 movesafter turn 8 · 53 movesafter turn 9 · 60 movesafter turn 10 · 67 movesafter turn 11 · 73 movesafter turn 12 · 80 movesafter turn 13 · 90 moves