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AI for commercial real estate, the grounding answers first

The questions deal teams actually ask, answered in plain English with every claim linked to a primary source and every study's method published. Not legal, appraisal, or investment advice; you verify before you rely.

We gave four AIs commercial deals with the numbers missing. Three of them invented the numbers anyway.50 commercial real estate prompts with critical data deliberately left out, 200 outputs, a published screen, no AI judging AI. On the pressured asks, ChatGPT and Claude stated invented figures as fact 90% and 70% of the time. The same model wrapped in grounding rules: 0%.Steve Gustafson · 2026-07-17

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