Incident with Copilot Grok Code Fast 1
Incident
Report for GitHub
Resolved
On Dec 15th, 2025, between 14:00 UTC and 15:45 UTC the Copilot service was degraded for Grok Code Fast 1 model. On average, 4% of the requests to this model failed due to an issue with our upstream provider. No other models were impacted.
The issue was resolved after the upstream provider fixed the problem that caused the disruption. GitHub will continue to enhance our monitoring and alerting systems to reduce the time it takes to detect and mitigate similar issues in the future.
The issue was resolved after the upstream provider fixed the problem that caused the disruption. GitHub will continue to enhance our monitoring and alerting systems to reduce the time it takes to detect and mitigate similar issues in the future.
Update
We are continuing to work with our provider on resolving the incident with Grok Code Fast 1. Users can expect some requests to intermittently fail until all issues are resolved.
Update
We are experiencing degraded availability for the Grok Code Fast 1 model in Copilot Chat, VS Code and other Copilot products. This is due to an issue with an upstream model provider. We are working with them to resolve the issue.
Other models are available and working as expected.
Other models are available and working as expected.
Investigating
We are investigating reports of degraded performance for Copilot
This incident affected: Copilot.
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