Breaking

ChatGPT, Claude and Grok Recover After Rare Overlapping Outage

September 3, 2026 at 19:11 EDT

Foundation Models
Software Dev & Coding

OpenAI’s ChatGPT, Anthropic’s Claude and xAI’s Grok experienced overlapping service disruptions on Thursday, September 3, an unusual simultaneous failure across three leading AI assistants. The latest provider updates said all three had recovered, but none disclosed a common root cause.

SEPTEMBER 3, 2026 | AI SERVICES

Leading AI Services Hit in the Same Window

ChatGPT, Claude and Grok reported disruptions during the same morning window, then recovered. No shared technical cause was confirmed.

The incident at a glance

Affected services

3h 37m

Grok Web disruption

1,365

Peak Grok reports

Grok reports dropped after the peak

The later reported count was one-fifth of the 9:45 a.m. peak.

1,365
9:45 a.m. ET

273
Later

Observed impact

ChatGPT and Codex reported elevated errors.
Claude affected its app, API, Code and Cowork services.
Grok Web was disrupted for 3h 37m.

Open questions

No common technical cause was confirmed.
The Azure connection remained unproven.
Gemini had reports, but no official outage notice.

THE TAKEAWAY

One unusual overlap, one unresolved question

Three competing assistants were degraded in a short window. The public records show recovery and mitigations, but they do not establish a shared cause.

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