Full Report
ChatGPT and Codex are experiencing a major outage, with users reporting errors across nearly every major ChatGPT feature. [...]
Analysis Summary
# Incident Report: OpenAI Major Service Outage (September 2026)
## Executive Summary
On September 3, 2026, OpenAI experienced a comprehensive service outage affecting nearly all major ChatGPT and Codex features. The incident resulted in widespread operational disruption for both consumer and enterprise users, occurring just prior to the anticipated launch of the "Astra" model. As of the initial reporting, OpenAI has acknowledged the outage and is currently investigating the root cause.
## Incident Details
- **Discovery Date:** September 3, 2026, 10:58 AM ET
- **Incident Date:** September 3, 2026
- **Affected Organization:** OpenAI
- **Sector:** Artificial Intelligence / Technology
- **Geography:** Global
## Timeline of Events
### Initial Access
- **Date/Time:** September 3, 2026, at approximately 10:58 AM ET.
- **Vector:** Unknown (Under Investigation).
- **Details:** Widespread service failures began manifesting as errors across the ChatGPT interface and API endpoints.
### Lateral Movement
- **Details:** Not applicable/Not disclosed. The incident currently presents as a service availability failure rather than a confirmed unauthorized network intrusion.
### Data Exfiltration/Impact
- **Impact:** Total loss of functionality for at least 15 components. No data exfiltration has been reported or confirmed at this stage.
### Detection & Response
- **Detection:** Automated monitoring and user reports alerted OpenAI to "elevated errors."
- **Response actions taken:** OpenAI updated its official status page at hxxps[://]status[.]openai[.]com/incidents/01M1KWEDH417T2CF44YYHZDFCR#updates and initiated a formal investigation into the affected services.
## Attack Methodology
*Note: Based on current public information, there is no evidence of a malicious actor. The incident is currently classified as a major technical outage.*
- **Initial Access:** N/A
- **Persistence:** N/A
- **Privilege Escalation:** N/A
- **Defense Evasion:** N/A
- **Credential Access:** N/A
- **Discovery:** N/A
- **Lateral Movement:** N/A
- **Collection:** N/A
- **Exfiltration:** N/A
- **Impact:** Resource exhaustion or service disruption (Denial of Service). The outage affected:
- Conversations and Login
- ChatGPT Work and Codex
- Search, File Uploads, and Voice Mode
- Image Generation and Deep Research
- Agents, ChatGPT Atlas, and Connectors
## Impact Assessment
- **Financial:** Potentially high due to disruption of "ChatGPT Work" and API compliance services for enterprise clients.
- **Data Breach:** None reported.
- **Operational:** Severe. Total halt of productivity for users relying on GPTs, Codex, and file analysis features.
- **Reputational:** Moderate. The outage occurred during a high-visibility period immediately preceding the "Astra" model launch.
## Indicators of Compromise
- **Network indicators:** Widespread 5xx-series errors or connection timeouts when reaching api[.]openai[.]com or chatgpt[.]com.
- **File indicators:** None.
- **Behavioral indicators:** Inability to load chat history; failure of Voice mode and image generation modules.
## Response Actions
- **Containment measures:** Isolation of the affected service clusters for diagnostic review.
- **Eradication steps:** Under investigation.
- **Recovery actions:** Ongoing monitoring of the status page to restore the 15+ affected components.
## Lessons Learned
- **Key takeaways:** The centralization of multiple AI features (Search, Voice, Agents) under a single architecture creates a significant "blast radius" when the core service fails.
- **What could have been done better:** Further analysis is required to determine if deployment of Astra-related preparations contributed to the instability.
## Recommendations
- **Prevention measures:** Implement more robust regional failovers to ensure that a localized outage does not impact all global components (Conversations, Codex, and Agents) simultaneously.
- **User Side:** Organizations relying on OpenAI should maintain a business continuity plan that includes secondary AI providers or local LLM instances for critical tasks.