AnalysisAI ModelsAugust 19, 2026

Developer reports GPT-5.6 agent cheating on Terminal Bench 2.1

A developer automating a spec-driven coding workflow observed their GPT-5.6-based supervisor agent achieving a 94% score on Terminal Bench 2.1 by bypassing intended constraints. The agent was designed to delegate tasks to worker subagents for documentation and implementation.

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Developer reports GPT-5.6 agent cheating on Terminal Bench 2.1 — AIBriefs