Anthropic Blocks ‘Malicious Use’ of AI that Could Develop Biological Weapons
Anthropic has identified and disrupted attempts to use its AI model for "malicious activity" that could support the development of biological and conventional weapons. The company’s AI model Claude was also involved in a Russia-linked cyber espionage campaign and utilized by an Iranian propaganda institution, according to Anthropic’s latest threat intelligence report.
These cases, detected over the past eight months, ranged from fake dating apps and hotel Wi-Fi scams to surveillance built to identify dissidents. The revelations come on the heels of warnings from a leading safety researcher at Anthropic about AI’s potential risks to humanity.
Anthropic has also accused Chinese AI firms of attempting to replicate Claude’s capabilities. It released its latest threat intelligence report on Thursday, stating its belief in having "a responsibility to disclose malicious misuse of our services".
The extensive report details instances where suspected state-sponsored groups, criminals, spyware vendors, state propaganda institutions, and politically motivated individuals misused Anthropic’s technology for:
- Cyber and influence operations
- Surveillance
- Scams and fraud
- Weapon development
Specifics:
- Anthropic disrupted "malicious use" of its Claude Haiku, Sonnet, and Opus models between December 2025 and August 2026.
- None of the misuse cases involved Claude Fable or the powerful Mythos-class models.
- The report highlights five case studies of actors using AI for potential biological weapons development, emphasizing the significant risk this poses.
"The same information that can be used to develop a biological weapon could also be used to develop, for example, a vaccine or a cure for a disease," Anthropic stated.
Jacob Klein, Head of Threat Intelligence at Anthropic, acknowledged the complex nature of these issues: "You are not seeing someone in a comic book kind of way say, ‘Hey, I want to build a biological weapon to kill everybody.’"
