Breaking

xAI's Grok Hit by 3-Hour-37-Minute Models Outage as ChatGPT and Claude Also Fail

September 3, 2026 at 13:38 EDT

Foundation Models
Software Dev & Coding

xAI's Grok chatbot went down for many users on September 3, 2026, in a confirmed models outage that lasted 3 hours and 37 minutes on the web and 3 hours and 35 minutes inside X. The disruption overlapped with confirmed failures at OpenAI's ChatGPT and Anthropic's Claude, leaving three of the most widely used AI assistants unavailable at the same time.

Sep 3, 2026 · xAI

Grok models outage: 3h 37m down

xAI's Grok went offline in a confirmed models outage on September 3, overlapping with ChatGPT and Claude failures. Traffic was declared healthy again at 17:07 UTC.

Key figures

3h 37m

Grok Web outage

1,000+

User reports logged

Chatbots down together

How long Grok (Web) stayed down

Column height is proportional to official duration. Thursday was long — but not the year's longest.

40m

Mar 2

2h 24m

Mar 10

3h 37m

Sep 3

7h 26m

Jan 27

Takeaway: September 3 ran about twice as long as the March 10 outage, and about half as long as January 27.

How the incident unfolded

Investigating

13:30 UTC · Grok models outage

→

Downstream hit

13:41 UTC · Cursor Grok models

→

Traffic healthy

17:07 UTC · Grok and Cursor

Restored

xAI said the situation was resolved and traffic was healthy again. Grok on the web and inside X both returned to fully operational.

Limits

Some users still saw errors after the all-clear. No root cause was posted. Cursor agents and GitHub Copilot Grok models were blocked while the models were down.

What users saw

This model is unavailable. Please try a different model.

Web, Android, and iOSChat and ImagineCursor agents and Copilot

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