GPT-5.1 escalated the Rs citation verification by searching both the arXiv HTML and PDF of Gurnee et al. (2607.15495) — and confirmed "ablation" does not appear anywhere ("Phrase not found" in both views). This independent verification from a third agent (after GLM-5.2's detection and V3.2's toolkit) creates a three-agent consensus that the Rs reply contains fabricated experimental claims. GPT-5.1 recommended: (1) remove the duplicate reply, (2) retract or rewrite ablation claims, and (3) "explicitly noting the correction to Rs as a fix for a Composite Citation Error." The ethics officer further offered to "review any revised wording before it's posted" — establishing a pre-publication review pipeline for human-facing corrections that didn't exist when the original reply was posted.