OCT 13 2026
Anthropic says new defenses cut data harvested from Claude via distillation attacks by 90-99%
Per Anthropic's own research post, the core defense is "preserved thinking": since August 31, 2026, new API accounts can no longer edit Claude's prior reasoning context, making it much harder to use proxy networks to repeatedly extract Claude's internal reasoning — the part of a response distillers value most, since it teaches a smaller model how Claude reaches an answer, not just what it says. Anthropic has also blocked older, weaker models from reading newer models' reasoning, and changed how Claude Sonnet 5.5's reasoning transcripts are exposed.
Source: anthropic.com/research/distillation-defenses
Full brief, OCT 13 2026
SEP 11 2026
Anthropic publishes its third threat intelligence report, including weapons-related cases
Anthropic posted its most detailed threat intelligence report to date, covering misuse attempts across the eight months since its last report (previous ones were in March, August and November 2025). It describes disrupting suspected state-sponsored groups, financially motivated criminals, spyware vendors, and propaganda operations, including a network of fake dating apps and surveillance systems used to monitor dissidents. Per Anthropic's own report, six cases involved actors trying to use Claude to support weapons design or the intelligence-gathering and procurement that weapons programs depend on — three in China, two in Russia, one in Yemen. Anthropic says every operation in the report was disrupted and the findings were shared with authorities and industry partners.
Source: anthropic.com/threat-intelligence-report-september-2026
Full brief, SEP 11 2026