At a Glance · AI-generated

ChatGPT, Claude, and Grok experienced a simultaneous outage on September 3, 2026, disrupting access to three of the most widely-used AI assistants. The coordinated downtime affected services from OpenAI, Anthropic, and xAI, though neither company immediately disclosed the cause. The outage prompted widespread speculation about whether a shared infrastructure failure or external incident triggered the widespread disruption across multiple AI platforms.