Grok outage reported
Archived — this story has rotated out of today’s deck. It is kept here in full.
The gist
Grok and other AI services like ChatGPT and Claude suffered outages on Sep 3, 2026. The simultaneous failures across separate companies raised questions about shared infrastructure.
Background
On September 3, 2026, users reported widespread outages affecting major AI platforms including ChatGPT, Claude, Grok, and Gemini, according to Downdetector. The disruptions began around 9:00 AM ET, with Grok users seeing 'This model is unavailable' errors. xAI's status page initially showed issues but later indicated services were available, while other companies acknowledged elevated errors. The cause remains unclear, with speculation about shared cloud services like AWS or Cloudflare.
How it unfolded
- Sep 3, 2026 09:00Users start reporting Grok outages on Downdetector, with over 1,000 reports by mid-morning.
- Sep 3, 2026 11:17OpenAI users report widespread ChatGPT failures; Anthropic acknowledges elevated errors on Claude.
- Sep 3, 2026 15:00News outlets report simultaneous outages across ChatGPT, Claude, Grok, and Gemini; xAI status page shows issues.
- Sep 3, 2026 15:56OpenAI reports drop in errors, but Claude, Grok, and Gemini remain elevated; Cloudflare and AWS also show issues.
Who’s saying what
- Official
- xAI's status page initially listed Grok as available despite user reports, while Anthropic acknowledged elevated errors and said engineers were working on fixes.
- Analysts
- The simultaneous nature of outages across separate AI companies suggests a possible shared dependency on cloud providers like AWS or Cloudflare.
- Public
- Users expressed frustration on Downdetector, reporting error messages like 'This model is unavailable' and inability to access services.
Still unverified
The exact cause of the outages is unconfirmed; speculation about shared cloud infrastructure (AWS, Cloudflare) is based on concurrent reports but not verified. GPT-6 Astra rumors are unconfirmed.