Several major AI services appeared to hit reliability problems, according to Tom's Guide, which reported a sharp rise in user outage reports for ChatGPT, Claude, Gemini and Grok. The largest spike was tied to OpenAI's ChatGPT. Tom's Guide cited more than 40,000 Downdetector reports for ChatGPT, compared with about 1,500 for Claude. Gemini and Grok also showed smaller spikes, according to the same report. The status signals were not limited to user-reporting sites. Tom's Guide said OpenAI's official status page showed service issues and stated that the company had “applied the mitigation and is monitoring the recovery.” The report also said Claude's status page showed issues and had done so for the last couple of hours. The incident may already have been improving by the time Tom's Guide published its update. The outlet reported that Downdetector reports across the affected services had fallen sharply, and noted that both OpenAI and Claude had said mitigations were in place. The precise scale and duration should be treated as developing rather than settled. What is supported by the available item is a broad, visible disruption pattern across several consumer AI services, with the strongest reported impact on ChatGPT and signs of recovery after mitigations. Who benefits: Too early to tell. The available reporting does not establish which services or users benefited during the incident. Who's exposed: Users of ChatGPT and Claude were exposed to the most clearly reported disruption signals. Gemini and Grok also saw smaller reported spikes, according to Tom's Guide.