OpenAI's ChatGPT has faced recurrent partial disruptions in March 2026, with over 20 incidents logged on status.openai.com involving elevated error rates in file uploads/downloads, logins, SSO access, and features like pinned chats and Realtime API—though none were classified as full outages upon resolution, per market criteria. Surging demand for GPT-5.4, released March 5 with reliability gains like 19.7% better internal knowledge accuracy, continues straining infrastructure amid competitive pressure from Anthropic's Claude. Trader consensus reflects historical February blackouts alongside high 99.91% uptime, with minor voice note reports today (April 2) not yet qualifying. Watch for escalated classifications or peak usage spikes before resolution.