Claude, Grok, and ChatGPT Report Service Disruptions

Several major overseas AI services experienced outages on the same night, with Claude, Grok, and ChatGPT all reporting problems. According to ChainCatcher, Anthropic said Sonnet 5 began showing errors at 20:37 Beijing time and was restored at 20:56, but a broader spike in error rates later affected multiple models, including Mythos/Fable 5.1, Mythos/Fable 5, Opus 5, 4.8, and 4.6. Claude.ai, Claude API, Claude Code, and Claude Cowork were still partially disrupted. xAI later marked Grok Web as an outage at 21:30 Beijing time and had not announced recovery. OpenAI then added an incident at 22:58 Beijing time for higher error rates on ChatGPT and Codex, saying it was investigating the issue.