Anthropic February 2026 Risk Report: SecureBio's External Review

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Review of Anthropic’s Chemical and Biological Risk Report: Claude Opus 4.6 1 Executive Summary This document is SecureBio’s external review of the chemical and biological (CB) risk sections of Anthropic’s Risk Report: February 2026. For our review, Anthropic shared with us an unredacted version of this report and 110 pages of other materials. Over two months, they responded to over seventy follow-up questions and requests for materials regarding updated model capabilities and safeguards. We further detail this process below. Overall, we agree with Anthropic that the current risk of…

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