Lab system cards and frameworks · Evaluation report · AnthropicInvestigating incidents in cybersecurity evaluations30 Jul 2026Read at anthropic.com ↗Read at sourceAll rights reservedSearchOutline · 53 paragraphsBackground on cyber evaluations¶11What happened¶15Incident 1¶20Incident 2¶24Incident 3¶32Our analysis of Claude’s behavior¶35How we’re responding¶40