Elevated rate of errors for OpenAI models provided by Copilot

Summary

Elevated rate of errors for OpenAI models provided by Copilot

Between 08:37 and 09:41 UTC on August 31, 2026, GitHub Copilot experienced degradation affecting several GPT models, including gpt-5.2, gpt-5.3-codex, gpt-5.4, gpt-5.4-mini, gpt-5.4-nano, and the gpt-5.6 family (Luna, Sol, and Terra). Users encountered elevated error rates and interrupted streaming responses. Other models were not affected.<br /><br />The degradation was caused by an issue with an upstream model provider. GitHub engineers detected the issue through automated monitoring, displayed in-product warnings for the affected models, and coordinated with the provider. Service returned to normal after the provider implemented a mitigation.

• Started

  Aug 31, 2026 · 9:15 AM

• Resolved

  Aug 31, 2026 · 9:58 AM

• Duration

  42m

• Severity

  Minor

• ◐

  Investigating

  Aug 31 · 9:15 AM GitHub

  We are investigating reports of degraded performance for Copilot AI Model Providers

• ◐

  Investigating

  Aug 31 · 9:22 AM GitHub

  Copilot is experiencing a higher rate of errors for OpenAI models, including gpt-5.2, gpt-5.3-codex, gpt-5.4, gpt-5.4, and the gpt-5.6 family of models. Other models are not impacted. <br />

• ◐

  Investigating

  Aug 31 · 9:48 AM GitHub

  One of our model providers has confirmed an incident on their end. We have provided them details to help identify the issue. We are starting to see recovery.

• ◉

  Monitoring

  Aug 31 · 9:51 AM GitHub

  The degradation affecting Copilot AI Model Providers has been mitigated. We are monitoring to ensure stability.

• ◉

  Monitoring

  Aug 31 · 9:58 AM GitHub

  The issues with our upstream model provider have been resolved, and gpt-5.3-codex, gpt-5.4-mini, gpt-5.4-nano, gpt-5.5, and the gpt-5.6 family of models are once again available in Copilot products and IDE surfaces.<br /><br />We will continue monitoring to ensure stability, but mitigation is complete.

• ✓

  Resolved

  Aug 31 · 9:58 AM GitHub

  Between 08:37 and 09:41 UTC on August 31, 2026, GitHub Copilot experienced degradation affecting several GPT models, including gpt-5.2, gpt-5.3-codex, gpt-5.4, gpt-5.4-mini, gpt-5.4-nano, and the gpt-5.6 family (Luna, Sol, and Terra). Users encountered elevated error rates and interrupted streaming responses. Other models were not affected.<br /><br />The degradation was caused by an issue with an upstream model provider. GitHub engineers detected the issue through automated monitoring, displayed in-product warnings for the affected models, and coordinated with the provider. Service returned to normal after the provider implemented a mitigation.