block 1 chatgpt: 0 of 14 cells diverge, k = 4: agree
block 1 gemini: 2 of 14 cells diverge, k = 4: agree (D3, D6)
block 1 ai_mode: 4 of 14 cells diverge, k = 4: diverge (A1, C1p, C4p, D5)
block 2 chatgpt: 1 of 25 cells diverge, k = 7: agree (A2)
