Original, source-checked analysis of how often and how long ChatGPT, Codex, Claude and Gemini have problems, built from public status pages, incident write-ups and our own published datasets. We count incidents, measure how long they stay open, check whether status-page times match the providers’ own write-ups, rebuild the uptime figures the pages publish, and say plainly what the data cannot show. Every article links to its data and states its limits. Start with the State of AI Reliability overview, then read the guides on status-page stages, uptime, and outage write-ups.
When ChatGPT or Claude is not working, check the status page for the product you use (status.openai.com, status.claude.com) before changing anything. Incidents often stay open an hour or more (medians:…
Anthropic's status page listed 50 incidents between 27 July and 7 October 2026, and they were not all the same kind of problem. Sorting them by what each title names…
OpenAI and Anthropic both publish uptime percentages on their status pages, and they publish them differently: OpenAI shows one figure per component for a 90-day window plus a figure for…
A status page is only useful if its times roughly match what users experienced, and OpenAI gives us a way to check one half of that. For 15 incidents it…
Between 10 July and 8 October 2026, OpenAI's status feed recorded 111 incidents, and most were labelled degraded performance or left unlabelled, not outage. In OpenAI's own labels, 79 were…
OpenAI's write-up for its 29 September 2026 outage says a feature rollout caused routine settings requests to trigger repeated background checks, which opened connections across internal services until shared network…
When ChatGPT or Codex fails, incident titles are usually a variant of "elevated errors". For 15 of the 106 incidents on OpenAI's page since July, the company went further and…
On the status pages of OpenAI and Anthropic, many incidents pass through a "Monitoring" stage, where the company says a mitigation is in place and it is watching to confirm…
If you count the incidents each provider posted on its own status page, OpenAI logged 40 in September 2026 and Anthropic logged 13, which looks like a clear win for…
On 3 September 2026, ChatGPT and Claude both had real outages, within a few hours of each other, and Grok and Gemini were reportedly affected too. At least one contemporaneous…