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On September 29, 2026, Anthropic's Claude AI experienced a major outage affecting chat, coding, and API services, leaving thousands of users unable to access the platform. Some messages sent during the disruption were lost. Anthropic mitigated the issue and restored services, but users were advised to check for missing data.[AI generated]
Why's our monitor labelling this an incident or hazard?
The event involves the malfunction of AI systems (Claude AI services) that has directly led to disruption of access and degraded performance for thousands of users. This disruption affects the operation of critical AI infrastructure and tools relied upon by users, constituting a harm in terms of service availability and reliability. Although no physical harm or legal violation is reported, the widespread service outage and degraded performance qualify as an AI Incident under the category of disruption of management and operation of critical infrastructure (here, AI service infrastructure).[AI generated]