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GitHub Copilot: Disruption with GPT 5.3 Codex
Timeline of updates
- resolved
Between 06:39 and 18:11 UTC on July 20, 2026, the Copilot service experienced a degradation of the GPT 5.3 model due to an issue with our upstream provider. The upstream model provider returned intermittent errors for GPT 5.3 Codex requests, which caused some responses to fail. Auto mode requests that had selected GPT 5.3 Codex were also impacted. On average about 2% of GPT 5.3 Codex requests failed during this window. Copilot automatically routed eligible traffic away from the impacted provider to reduce customer impact. No other models were impacted. We worked with the upstream provider throughout the incident and confirmed sustained recovery before resolving.
From GitHub Copilot’s published incident history: for incidents before Rewindex began polling this status page, only the final update text is available.
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This incident predates live tracking (October 17, 2026). It came from the vendor’s own published history, which is not covered by checkpoints.
Impact, status and times are the vendor’s own, as last archived. View on www.githubstatus.com (opens in new tab).
Cite this
Status incident (vendor impact label: minor) posted by GitHub Copilot, started 2026-07-20 16:03 UTC, resolved after 2.6 h, 1 update(s).
- Title
- Disruption with GPT 5.3 Codex
- Vendor
- GitHub Copilot
- Date
- URL
- https://rewindex.com/company/github-copilot/incidents/fd7j2mw8xw94
GitHub Copilot profileRecent GitHub Copilot incidentsAll outages on July 20, 2026GitHub Copilot in July 2026MarkdownJSON