ChatGPT, Claude, and Grok experienced service disruptions on Thursday morning, September 3, preventing many users from accessing their AI tools for writing, research, and coding. OpenAI drew the most complaints with approximately 38,000 reports on Downdetector, while Claude and Grok each peaked near 1,400. The three companies resolved their issues starting at 12:16 p.m. EST, with Anthropic at 12:16 p.m., OpenAI at 12:55 p.m., and xAI at 1:07 p.m. EST. ChatGPT serves over 1 billion weekly active users, Claude has approximately 300 million monthly active users, and Grok has approximately 117 million monthly active users. These outages occurred as competition among AI assistants continues to intensify, with Grok and Gemini gaining ground on ChatGPT’s market share.
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