GoKawiilAnthropic says it blocked ~35 suspected state-backed bioweapons research attempts on Claude
Anthropic reports identifying roughly 35 attempts between November 2025 and September 2026 by suspected state-sponsored actors trying to misuse Claude for bioweapons-related research, including queries on chikungunya gain-of-function work, bird flu adaptation for mammals, and orthopoxviruses like smallpox and mpox. At least five cases showed users evading regional access blocks through anonymizing techniques, prompting Anthropic to ban the accounts and tighten its safety systems.