GitHub incident: Elevated rate of errors for OpenAI models provided by Copilot

Affected components

• Copilot AI Model Providers

1. resolvedAug 31, 2026, 09:58 UTC

   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.

2. monitoringAug 31, 2026, 09:58 UTC

   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.

3. monitoringAug 31, 2026, 09:51 UTC

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

4. investigatingAug 31, 2026, 09:48 UTC

   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.

5. investigatingAug 31, 2026, 09:22 UTC

   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 />

6. investigatingAug 31, 2026, 09:15 UTC

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

What APIStatus.watch saw

Our 5-minute checks didn't record a change in GitHub's overall status around this incident. Smaller or regional incidents often leave a provider's overall status green.

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How often does GitHub have incidents?

GitHub reported 49 incidents in the last 90 days, 15 of them major or critical. A typical incident lasted 1h 16m. See GitHub's uptime and incident history