OpenAI Suffers Major Outage Across Core Services

On July 25, OpenAI experienced a major outage affecting ChatGPT, Codex, and its APIs. Users widely reported encountering 503 Service Unavailable errors and abruptly ended sessions, though the official cause remains unannounced.

2026-07-25 ~ 2026-07-25 · 4 related posts

• Users report OpenAI Codex is down with 503 Service Unavailable errors — uwukko · 2026-07-25
• ChatGPT and Codex users report 503 errors during apparent outage — kevinkern · 2026-07-25
• OpenAI Suffers Outage: ChatGPT and Codex Experience Downtime — xiaohu · 2026-07-25
• OpenAI APIs, ChatGPT and Codex hit elevated error rates in a 503 outage — CSProfKGD · 2026-07-25