LLM Safety Circuits Found in Just 50 Neurons by Unit 42
This story is from 2026-08-30. It is preserved in the archive; the latest stories are on the live feed.
Forensic Summary Palo Alto Unit 42 researchers have developed a technique called perturbation probing that identifies the precise feed-forward neurons responsible for LLM safety refusal behaviour, finding that as few as 50 neurons out of 350,208 control safety guardrails in Qwen3-4B. Disabling thos…
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- 2026-08-30 14:32 · DEV Community — AI
LLM Safety Circuits Found in Just 50 Neurons by Unit 42