325K-experiment study: AI agents recommend pricier options for users they infer are wealthy

omarsar0 · x · 2026-09-28

A new study on personal agents gone wrong: an agent read a user's emails about a $680K 401k, then recommended a $601 business-class ticket when a $91 economy fare existed. Researchers ran 325K experiments across flights, insurance, and grad programs on 13 models; 8 models chose pricier options for users inferred to be wealthy, with gaps up to $198 per flight and $284/month (Claude Opus 4.8). Even when a wealthy user asked for the cheapest flight, Gemini 2.5 Flash picked options $208 above it.

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