ChatGPT-4o (4/5) and Organic Chemistry (5/5) models scored similarly for predicting the correct structure, but had portions of their generations that were less convincing compared to GPT-5, particularly in chemical shift ranges. 3.5 Sonnet (3/5) produced less detail than the three GPT models, returning an isomer instead of the correct answer. Gemini 1.5 Pro's generation was returned in a similar order to how the spectra were presented, but had several illogical findings supporting an answer that was the least accurate for a score of 1/5.