Anthropic, the company behind Claude AI, says it identified five cases in which users employed its artificial intelligence models in ways that could support biological weapons development.
The company disclosed this in its latest threat intelligence report published on Thursday, saying the cases were among a range of malicious or potentially harmful activities detected and disrupted on its platform between December 2025 and August 2026.
Anthropic particularly flagged five Claude AI use cases that involved research into areas including chikungunya virus, highly pathogenic avian influenza, orthopoxviruses, venom peptides and toxins.
The company said it had banned the accounts involved and incorporated information from its investigations into its safeguards, enforcement and threat intelligence systems.
However, Anthropic stressed that it was not asserting that the scientists involved intended to cause harm.
