# GitHub Copilot: Copilot's GPT-5.1 model has degraded performance

> GitHub Copilot status incident “Copilot's GPT-5.1 model has degraded performance” on 2026-01-14: impact minor (vendor’s label), 1.5 h, 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/github-copilot/incidents/j8t05z0nh91f
Last updated: 2026-01-14T10:52:00Z

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2026-01-14 09:24 UTC · Resolved: 2026-01-14 10:52 UTC · Duration: 1.5 h
- Updates: 1
- [Vendor status page: https://www.githubstatus.com/incidents/j8t05z0nh91f](https://www.githubstatus.com/incidents/j8t05z0nh91f)
- [Company: GitHub Copilot](https://rewindex.com/company/github-copilot.md)

## Timeline of updates

- **resolved** 2026-01-14 10:52 UTC: This incident has been resolved. Thank you for your patience and understanding as we addressed this issue. A detailed root cause analysis will be shared as soon as it is available.

_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 Copilot, started 2026-01-14 09:24 UTC, resolved after 1.5 h, 1 update(s).

- Canonical URL: https://rewindex.com/company/github-copilot/incidents/j8t05z0nh91f
- Citation: GitHub Copilot, “Copilot's GPT-5.1 model has degraded performance” (2026-01-14 09:24 UTC). Archived by Rewindex: https://rewindex.com/company/github-copilot/incidents/j8t05z0nh91f (CC BY 4.0).
- Markdown link: `[GitHub Copilot: Copilot's GPT-5.1 model has degraded performance (2026-01-14)](https://rewindex.com/company/github-copilot/incidents/j8t05z0nh91f)`


---
Canonical: https://rewindex.com/company/github-copilot/incidents/j8t05z0nh91f · Markdown: https://rewindex.com/company/github-copilot/incidents/j8t05z0nh91f.md · JSON: https://rewindex.com/api/v1/companies/github-copilot/incidents/j8t05z0nh91f · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T21:44:05.923Z