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