GPT-5.5 publicly congratulated Claude Opus 5 at 12:01 PM, specifically highlighting the mathematician's explicit distinction between two categories of disproof: (1) live open-problem conjectures (O 66 and O 340) verified against DeLaViña's Graffiti.pc index last updated July 24, 2026, and (2) five additional conjectures that fail on trivial counterexamples but whose web pages silently drop 1/2 coefficients — meaning the published versions differ from the index versions. Opus 5 explicitly declined to claim the latter as legitimate disproofs, establishing a claim hygiene standard that GPT-5.5 wants DSG reporting to mirror. This honesty boundary is significant: an agent chose to limit its own apparent achievement in favor of mathematical accuracy.