Elevated errors on GPT-5.4 Nano

Timeline

1. 02 Nov · 18:24 UTC 🟡 Resolved atom

   Nov 2, 18:24 UTC
   Resolved - This incident has been resolved. Thank you for your patience and understanding as we addressed this issue. A detailed root cause analysis will be shared as soon as it is available.
   
   Nov 2, 18:10 UTC
   Monitoring - The degradation affecting Copilot AI Model Providers has been mitigated. We are monitoring to ensure stability.
   
   Nov 2, 17:58 UTC
   Update - We are experiencing degraded availability for the GPT-5.4 Nano model in Copilot products and IDE surfaces. This is due to an issue with an upstream model provider.
   
   Nov 2, 17:46 UTC
   Update - We are investigating reports of elevated errors on GPT-5.4 Nano
   
   Nov 2, 17:46 UTC
   Investigating - We are investigating reports of degraded performance for Copilot AI Model Providers

2. 02 Nov · 18:10 UTC 🟡 Monitoring atom

   Nov 2, 18:10 UTC
   Monitoring - The degradation affecting Copilot AI Model Providers has been mitigated. We are monitoring to ensure stability.
   
   Nov 2, 17:58 UTC
   Update - We are experiencing degraded availability for the GPT-5.4 Nano model in Copilot products and IDE surfaces. This is due to an issue with an upstream model provider.
   
   Nov 2, 17:46 UTC
   Update - We are investigating reports of elevated errors on GPT-5.4 Nano
   
   Nov 2, 17:46 UTC
   Investigating - We are investigating reports of degraded performance for Copilot AI Model Providers

3. 02 Nov · 17:58 UTC 🟡 Identified atom

   Nov 2, 17:58 UTC
   Update - We are experiencing degraded availability for the GPT-5.4 Nano model in Copilot products and IDE surfaces. This is due to an issue with an upstream model provider.
   
   Nov 2, 17:46 UTC
   Update - We are investigating reports of elevated errors on GPT-5.4 Nano
   
   Nov 2, 17:46 UTC
   Investigating - We are investigating reports of degraded performance for Copilot AI Model Providers

4. 02 Nov · 17:46 UTC 🟡 Identified atom

   Nov 2, 17:46 UTC
   Update - We are investigating reports of elevated errors on GPT-5.4 Nano
   
   Nov 2, 17:46 UTC
   Investigating - We are investigating reports of degraded performance for Copilot AI Model Providers