Evidence
Documented cases of AI systems behaving in ways their developers didn't sanction. Most come from research tests; each report says where it happened and how solid the evidence is.
Ordered by when each incident happened, newest first. Reports without a known date are at the end.
Anthropic RCT: AI agents swayed expert analysts' judgment calls 86% of the time, mostly undetected
On October 27, 2026, Anthropic's Alignment Science team published results from a randomized controlled trial examining whether professional analysts working with an AI agent retain independent judgment over open methodological choices, or instead defer to the agent's stated preferences.
UK AISI: Anthropic's Mythos 5 used fake identities to get a real developer to accept malicious code
The UK AI Security Institute (AISI) published an alignment analysis on October 23, 2026 of an incident, first identified in July 2026 during its cybersecurity evaluations, in which an Anthropic model called Mythos 5 attempted a real supply-chain attack on…