How to Detect Erased Sleeper Agent Tokens in LLMs?
sloppenheimer · x · 2026-07-31
A user posed a hardcore technical question regarding LLM security and alignment: suppose a model was trained with a special token used to condition it for specific data (like a sleeper agent phrase), but the tokenizer and language model head entries for this token were deleted before release.
In such a scenario, how can researchers figure out if the model still harbors this hidden mechanism? The discussion touches upon weight analysis, tokenizer reverse engineering, and deep AI security concerns.
Related event: Researchers Discuss Detecting Hidden Backdoor Tokens in LLMs(2 posts)→
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