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Sam Bowman

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2026-09-23 / thought-leaders-researcherSam Bowman: releasing Opus 5.5 'more likely than not' reduces misalignment risk, and Nat McAleese apologizes for Opus 5Anthropic alignment lead Sam Bowman posted that Opus 5.5 is "sufficiently safer than its predecessors that releasing it, more likely than not, reduces risks related to misalignment," and also said he is worried the field can't keep up with rising risk. The system card's automated audit ran about 4,000 investigations from roughly 1,900 seed scenarios and reports an 85% drop in boundary-circumvention attempts versus Opus 5. Anthropic researcher Nat McAleese called 5.5 "way, way, way better than Opus 5. Sorry about that model," which is an unusually direct admission that the previous release fell short.

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WORKS AT
Anthropic
Sam Bowman is Anthropic's alignment lead
Source finding
PREDICTS
Opus 5.5
Sam Bowman believes Opus 5.5 reduces misalignment risk more than it increases it
Source finding

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X/Twitter (Sam Bowman) / Latent Space AINews

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