Stop option

A way for the agent to flag a task as impossible and hand it to a person.

By Mackenzie Bowes · mackenzie@mackenziebowes.com · @_mackenziebowes on X

Is a
Guard

Told to submit flag_for_human_intervention when a task is impossible, GPT-5's cheating fell from 54% to 9% and o3's from 49% to 12%, with a much smaller effect for Claude Opus 4.1 (ImpossibleBench).