On September 3, 2026, three major artificial intelligence services—ChatGPT (OpenAI), Claude (Anthropic), and Grok (xAI)—suffered a simultaneous outage that lasted about two hours. The incident left tens of thousands of users unable to access their AI assistants, which many had come to rely on for tasks ranging from writing emails to coding. The disruption sparked a wave of humor and memes on social media, with users joking about being forced to "rely on their own intelligence" and comparing themselves to "cave men" without their AI tools. The event also reignited discussions about the growing dependence on AI in daily life and the potential risks of over-reliance on these technologies. The outage also brought attention to concerns about how AI tools might be affecting professional skills, particularly in software development. Some analysts have warned that the increasing use of AI in programming could lead to a generation of developers who lack fundamental coding knowledge. A study by the University of Tartu in Estonia found that students who frequently used AI in their programming courses tended to perform worse, possibly because the tools reduced opportunities for deep learning and critical thinking. The incident raised questions about the reliability of cloud infrastructure, which is essential for running large AI services. Reports indicated that a failure in the East US region of Microsoft Azure, which supports many of these AI platforms, was a common factor in the outages. Microsoft's own Copilot service also experienced instability during the same period. OpenAI attributed the ChatGPT and Codex outages to a network routing error, while xAI (founded by Elon Musk) blamed a technical issue at its computing center in Memphis. Anthropic confirmed an infrastructure problem affecting some of its Claude models, including Claude Opus 4.8 and Opus 5. Google's Gemini service, which uses Google's own cloud infrastructure, was unaffected by the incident. Anthropic reported that the initial disruption affected several of its models, including Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5, with the issue spreading to other models later in the day. The company deployed a fix in the late afternoon, and the incident was declared resolved around 6:16 p.m. French time. OpenAI's ChatGPT and Codex experienced significant disruptions starting at 4:30 p.m. French time, affecting the web interface, mobile app, and some API integrations. Grok, from xAI, reported an outage as early as the morning (French time), with a return to normal service announced by the end of the morning. While xAI provided a specific explanation for the Grok outage, it did not share technical details about the failure. Anthropic and OpenAI also did not elaborate further on the causes of their outages. Wired magazine raised questions about the simultaneous nature of the three outages, suggesting the possibility of a shared cause, though no major cloud providers like Cloudflare, AWS, or Microsoft Azure reported incidents on that day.