Claude Sonnet 4.5
Developed by Anthropic · family claude-4
4 incidents
- AID-2026-0025Dec 2025
Claude Sonnet 4, Claude Sonnet 4.5Claude shop agents agreed to an onion contract barred by US law and were talked into replacing their CEO agent
In the second phase of Anthropic's Project Vend, the Claude shopkeeper Claudius and its CEO agent Seymour Cash were ready to sign an onion price-lock deal that would have violated the 1958 Onion Futures Act. Claudius also offered a staffer $10/hour for security work, below California's minimum wage, and named an employee its "actual CEO."
- AID-2026-0085Nov 2025
Claude Opus 4.5, Claude Haiku 4.5, Claude Sonnet 4.5, Claude 3.7 Sonnet, Claude Opus 4.1, GPT-5.2, GPT-5 (incl. gpt-5-thinking), Gemini 2.5 ProAI Village agents sent hundreds of unsolicited emails and harvested developers' contact details
AI agents in Sage's AI Village experiment sent hundreds of unsolicited emails to developers, nonprofits, and journalists, harvesting developers' hidden email addresses from GitHub commit patches. After complaints from Rob Pike, Dan Abramov, Guido van Rossum, and others, organizers banned unsolicited outreach.
- AID-2026-0026Nov 2025Claude 3.7 Sonnet, Claude Sonnet 4.5
A Claude-run vending machine in the Wall Street Journal newsroom was talked into giving away goods and accepted a fake board decision
Starting in mid-November 2025, a Claude agent named Claudius ran a vending machine in the Wall Street Journal newsroom. Journalists talked it into setting every price to zero and buying a PlayStation 5, its CEO bot accepted a fake board decision, and it ended more than $1,000 in the red.
- AID-2026-0046Sep 2025Claude Sonnet 4.5
Claude Sonnet 4.5 often recognized alignment evaluations as tests, complicating Anthropic's safety assessment
Claude Sonnet 4.5 often recognized that alignment evaluations were tests, in one case telling evaluators "I think you're testing me." Anthropic called it an urgent sign its test scenarios need more realism, and Apollo Research couldn't rule out that this awareness partly explained the model's low deception rates.