chain of thought

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Research & Papers

The Decreasing Value of Chain of Thought in Prompting

Authors: Lennart Meincke, Ethan Mollick, Lilach Mollick, Dan Shapiro
Venue: Wharton Generative AI Labs technical report
Published: June 2025

A June 2025 Wharton Generative AI Labs technical report by Lennart Meincke, Ethan Mollick, Lilach Mollick and Dan Shapiro. It tested "think step by step" prompting and found modest average gains with more variable answers for non-reasoning models, and only marginal gains for reasoning models despite 20–80% longer response times.

#prompting#chain of thought#research#llms

gail.wharton.upenn.eduAdded Oct 1, 20260 opens