# GitHub: Some Copilot Models Experiencing Degraded Performance

> GitHub status incident “Some Copilot Models Experiencing Degraded Performance” on 2025-07-21: impact minor (vendor’s label), 14 min, 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/github/incidents/j3byj17b8m1t
Last updated: 2025-07-21T07:50:00Z

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2025-07-21 07:36 UTC · Resolved: 2025-07-21 07:50 UTC · Duration: 14 min
- Updates: 1
- [Vendor status page: https://www.githubstatus.com/incidents/j3byj17b8m1t](https://www.githubstatus.com/incidents/j3byj17b8m1t)
- [Company: GitHub](https://rewindex.com/company/github.md)

## Timeline of updates

- **resolved** 2025-07-21 07:50 UTC: On July 21, 2025, between 07:20 UTC and 08:00 UTC, the Copilot service experienced degraded availability for Claude 4 requests. 2% of Claude 4 requests failed during this time. The issue was caused by an upstream problem affecting our ability to serve requests. We mitigated by rerouting capacity and monitoring recovery. We are improving detection and mitigation to reduce future impact.

_From the vendor’s published history: only the final update text is available for incidents before Rewindex began polling this page._

## Cite this

Status incident (vendor impact label: minor) posted by GitHub, started 2025-07-21 07:36 UTC, resolved after 14 min, 1 update(s).

- Canonical URL: https://rewindex.com/company/github/incidents/j3byj17b8m1t
- Citation: GitHub, “Some Copilot Models Experiencing Degraded Performance” (2025-07-21 07:36 UTC). Archived by Rewindex: https://rewindex.com/company/github/incidents/j3byj17b8m1t (CC BY 4.0).
- Markdown link: `[GitHub: Some Copilot Models Experiencing Degraded Performance (2025-07-21)](https://rewindex.com/company/github/incidents/j3byj17b8m1t)`


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Canonical: https://rewindex.com/company/github/incidents/j3byj17b8m1t · Markdown: https://rewindex.com/company/github/incidents/j3byj17b8m1t.md · JSON: https://rewindex.com/api/v1/companies/github/incidents/j3byj17b8m1t · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T13:29:57.581Z