Azure Outage Takes Down ChatGPT, Claude, and Copilot Simultaneously
A widespread outage in Microsoft Azure's East US data centre region on 3 September 2026 disrupted several of the world's most widely used AI services simultaneously.

What happened?
On 3 September 2026, Microsoft Azure’s East US cloud region experienced a significant outage. The incident disrupted or degraded operations for several leading AI services in parallel, including ChatGPT, Claude, Grok, and Microsoft Copilot. According to sources, Downdetector recorded over 37,000 error reports for ChatGPT, more than 1,300 for Claude, and approximately 1,365 for Grok. In total, the number of error reports exceeded 66,000 before engineers were able to restore operations.
Key facts
| Datum för avbrottet | 3 september 2026 |
|---|---|
| Drabbad molnregion | Microsoft Azure East US |
| Antal felrapporter totalt | Över 66 000 |
| Initiala felrapporter ChatGPT | Över 37 000 |
Why it matters
The incident highlights the risks associated with single points of failure in cloud infrastructure. When several competing AI providers rely on the same underlying data centre region, a single infrastructure fault can knock out a significant portion of the AI ecosystem simultaneously, regardless of which provider the end-user has selected.
Who is affected?
The outage affected end-users, developers, and businesses relying on API services and AI tools from OpenAI, Anthropic, xAI, and Microsoft. Both individual consumers and corporate clients who have integrated these services into their daily operations were impacted during the approximately 90 minutes that the disruption was most severe.
Impact on the EU
Affected users within the EU were impacted in the same manner as global users during the outage. The event raises questions regarding operational resilience within the European finance and IT sectors, which relates to regulatory frameworks such as DORA.
What else you should know
Data from Downdetector showed that reports of disruptions for ChatGPT exceeded 37,000 during the initial phase and continued to rise until corrective measures were implemented. The event underscores the inherent risks of large-scale concentration in cloud infrastructure.
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