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ChatGPT, Claude, Grok Face Rare Overlapping Downtime

Created at 3 Sep · 6:16 PM2 sources↑ Market-relevant2 events
IN SHORT

ChatGPT, Claude, and Grok experienced significant service disruptions Thursday morning, impacting users' ability to write, research, and code. While services were largely restored by afternoon, the overlapping outages across major AI models are considered highly unusual.

Key Numbers

38,000peak ChatGPT complaints on Downdetector
1,400peak Claude complaints on Downdetector
1,400peak Grok complaints on Downdetector
80%ChatGPT among specific problem reports
35%Claude Chat among categorized reports
34%Claude Code among categorized reports
23%Claude app among categorized reports
10:43 a.m. ESTOpenAI began investigating elevated errors
11:17 a.m. ESTOpenAI applied mitigation
12:55 p.m. ESTOpenAI resolved ChatGPT issues
8:37 a.m. ESTAnthropic began investigating Claude Sonnet 5
12:16 p.m. ESTAnthropic resolved second Claude incident
9:26 a.m. ESTSecond Claude incident began
9:30 a.m. ESTxAI investigating Grok outage
1:07 p.m. ESTxAI resolved Grok issues
10:45 and 11:15 am ESTGemini API likely outage window

Who's Involved

ChatGPT
OpenAI's AI model that experienced service disruptions
Claude
Anthropic's AI model that experienced service disruptions
Grok
xAI's AI model that experienced service disruptions
Gemini
Google's AI model that experienced service disruptions
OpenAI
Company operating ChatGPT and Codex
Anthropic
Company operating Claude AI models
xAI
Company operating Grok AI model
Google
Company operating Gemini AI model
Simon Maechling
Chemist and science communicator who commented on outages
Dan Shipper
AI tool developer who joked about ChatGPT outage
ChatGPT, Claude, Grok Face Rare Overlapping Downtime

↳ Why This Matters

The overlapping downtime of major AI models like ChatGPT, Claude, and Grok underscores the increasing reliance on these tools for critical daily tasks and raises questions about the robustness of AI infrastructure and the potential impact of widespread outages on productivity.

Key facts

  • ChatGPT, Claude, Grok, and Gemini experienced significant and overlapping service interruptions on Thursday morning.
  • Users reported that the outages disrupted their work, including writing, research, and coding.
  • OpenAI, Anthropic, and xAI acknowledged issues with their respective AI models.
  • OpenAI reported a routing error caused ChatGPT and Codex unavailability for some users.
  • Anthropic cited an infrastructure issue for Claude outages.
  • Services for ChatGPT, Claude, and Grok were largely restored by Thursday afternoon.

Four major AI models—ChatGPT, Claude, Grok, and Gemini—experienced significant and overlapping service interruptions on Thursday morning, a rare occurrence for such prominent platforms. Users reported that the downtime disrupted their daily tasks, including writing, research, and coding. OpenAI, Anthropic, and xAI acknowledged the issues affecting their respective services, with most services restored by Thursday afternoon. OpenAI cited a routing error for ChatGPT and Codex issues, while Anthropic pointed to an infrastructure problem for Claude. Google has not publicly commented on Gemini's service disruption, though user reports indicated issues. The simultaneous failure of these leading AI tools highlights potential vulnerabilities in the rapidly growing AI infrastructure.

Frequently asked questions

ChatGPT, Claude, Grok, and Gemini all experienced significant service interruptions on Thursday morning.

Users reported that the downtime disrupted their work, including writing, research, and coding.

Overlapping downtime across multiple major AI models simultaneously is considered highly unusual.

OpenAI, Anthropic, and xAI reported that their affected services were largely restored by Thursday afternoon. Google has not publicly confirmed the status of Gemini.

What Happens Next

01Companies will likely conduct post-mortems to understand the root causes of the overlapping outages.
02Users and businesses may re-evaluate their dependence on single AI providers.
03Further technical details regarding the specific failures may be disclosed.
CME Headlines
  • Risk Management and Monitoring Notice: Multi-Factor Authentication Updates - September 12
    3 Sep · 5:00 AM

How It Developed

Four major AI models, ChatGPT, Claude, Grok, and Gemini, experienced significant and overlapping service interruptions on Thursday.
Users reported that losing access to these AI tools disrupted their writing, research, and coding.
OpenAI, Anthropic, and xAI acknowledged problems affecting their services, though it is unclear if the incidents were connected.
OpenAI reported elevated errors affecting ChatGPT and Codex starting at 10:43 a.m. EST, with mitigation applied by 11:17 a.m. and resolution by 12:55 p.m. EST.
Anthropic reported elevated error rates for Claude Sonnet 5 at 8:37 a.m. EST, resolving it by noon. A second incident affecting several Claude models began at 9:26 a.m. EST and was resolved by 12:16 p
xAI confirmed an outage affecting Grok's web and mobile apps, its presence on X, and two U.S. API regions, investigating at 9:30 a.m. EST and resolving by 1:07 p.m. EST.
Google's Gemini also saw a spike in DownDetector reports, with data indicating a likely outage for the Gemini API between 10:45 and 11:15 am EST.
OpenAI, Anthropic, and xAI stated their affected services were resolved by 12:55 p.m., 12:16 p.m., and 1:07 p.m. EST, respectively.

Sources

T1
Four major AI models suffer rare overlapping downtimevar abtest_2170358 = new ABTest(2170358, 'impression');Ars Technica
T1
ChatGPT, Claude and Grok Outages Leave Users Asking How to Work Without AIDecrypt

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