ChatGPT-4o properly identified several m/z values and IR functional group wave numbers, but missed 1H-NMR assignments, and did not analyze the DEPT-NMR spectrum. GPT-5 properly identified several m/z values and provided greater IR stretching and bending functional group identifications. 1H-NMR chemical shifts and assignments were improved over ChatGPT-4o, but were not entirely accurate.