OpenAI Experiences Significant Service Outages Affecting ChatGPT and Related Platforms

What happened
OpenAI reported elevated errors affecting ChatGPT, Codex, and API services on September 29, 2026.
The Context
- Service degradation: Users faced login issues, failed requests, and incomplete tasks, with a spike in outage reports.
- Timing matters: The incident coincided with OpenAI's annual developer conference, where a new AI assistant was unveiled.
- Previous issues: This outage follows a series of service disruptions throughout 2026, including problems with Anthropic's Claude.
The Number
outage reports were logged on Downdetector, with 85% related to ChatGPT, highlighting the service's critical role for users.
Takeaway
OpenAI aims to publish a root cause analysis within five business days, indicating a commitment to transparency and improvement.
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