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News/Before the Last Token: Diagnosing Final-Token Safety Probe Failures
arxiv
PublishedJuly 10, 2026 at 4:00 AM
—neutral

Before the Last Token: Diagnosing Final-Token Safety Probe Failures

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arXiv:2605.12726v2 Announce Type: replace Abstract: Final-token safety probes monitor a single hidden state after prompt prefill, but jailbreak prompts can contain probe-visible unsafe evidence distributed across earlier user-token representations that is missed by this readout. We study this prefil

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