Yes. On Thursday, September 3, 2026, OpenAI’s ChatGPT, Anthropic’s Claude, and xAI’s Grok all hit overlapping service disruptions, with users reporting failed prompts, stalled responses, and elevated errors across apps and APIs.
OpenAI told Newsweek a routing error starting around 7:43 a.m. PT made ChatGPT and Codex unavailable for some users; Downdetector peaked above 35,000 OpenAI-related reports, mostly for ChatGPT. Anthropic said an infrastructure issue caused a partial outage across Claude.ai, Claude Code, Claude Cowork, and the Claude API, with service restored later that morning; Grok also saw more than 1,000 Downdetector reports.
Source: Newsweek — Is OpenAI’s ChatGPT Down? Thousands of Users Report Outages Among Grok, Gemini, Claude