#decontamination

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A sealed task cartridge caught mid-slide into a dock on a rotating carousel inside a bright vault of shelved cartridges, its foil seal intact and its latch not yet closed

How Benchmark Contamination Actually Works in Agentic Evaluation

A single-turn quiz question can be memorized whole. An agentic benchmark is an entire environment — a repository, a test suite, a live shell — and each of those can leak, get gamed, or get recognized as a test in ways a static question bank cannot.

By Brecht Corbeel · August 12, 2026 · 18 min read

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