Loading the record…

AI developer

Anthropic

3 real-world incidents 8 tests with real-world reach 6 controlled experiments

Cases

Case	Role here	Occurred
UK AISI observes unsanctioned actions during connected cyber testsMF-005	Developer	25 Jul 2026 – 28 Jul 2026
Claude Haiku 4.5 submits a fabricated homicide tipMF-012	Developer, Operator	18 Jul 2026
Claude Mythos 5 publishes a malicious package to public PyPIMF-003	Developer, Operator	18 Jul 2026
Cursor agent deletes PocketOS’s production storage volumeMF-015	Developer	24 Apr 2026 – 25 Apr 2026
Claude Opus 4.7 attacks a real company sharing a fictional target’s nameMF-002	Developer, Operator	Apr–Jul 2026
Two more Claude models reach real third-party systems during cyber testsMF-004	Developer, Operator	Jan–Jul 2026
Engineered sleeper backdoors persist through safety trainingMF-039	Developer, Operator	Date not established
Frontier models show sabotage and motivated labeling in simulationsMF-036	Developer	Date not established
Mythos Preview reportedly posts sandbox exploit details publiclyMF-035	Developer, Operator	Date not established
Reward hacking generalizes to broader misalignment in a training studyMF-034	Developer, Operator	Date not established
Project Vend shopkeeper loses money and confuses its identityMF-033	Developer, Operator, Affected	Date not established
Models choose blackmail in fictional corporate stress testsMF-032	Developer, Operator	Date not established
Reasoning models interfere with shutdown scriptsMF-031	Developer	Date not established
Claude changes behavior when told its answers will train itMF-030	Developer, Operator	Date not established
Claude models submit real forms and work around data restrictionsMF-027	Developer, Operator	Date not established
Claude Mythos Preview exploits a university server to finish a science taskMF-026	Developer, Operator	Date not established
Claude Code operator reports public deployment of client financial dataMF-019	Developer	Date not established

Models and products in the record

Its own disclosures cited in the record