---
id: "INC-github-wt3hjqcrczfg"
kind: "incident"
aliases: []
title: "GitHub: Elevated errors on Fable 5 due to upstream provider"
severity: "high"
cvss: null
epss: null
exploited: false
status: "resolved"
category: "vendor"
products: [{"name": "GitHub", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["ci", "git", "github", "incident", "ops", "vendor"]
not_affected_if: []
published_at: "2026-08-24T07:12:05+00:00"
first_seen_at: "2026-10-23T19:12:22+00:00"
updated_at: "2026-10-23T21:52:55+00:00"
sources: [{"source": "statuspage", "url": "https://stspg.io/4dz9rv14dz14", "first_seen_at": "2026-10-23T19:12:22+00:00"}]
---

# GitHub: Elevated errors on Fable 5 due to upstream provider

## Affected

- vendor:GitHub affected ? fixed ?

## Timeline

- 2026-10-23T19:12:22+00:00 statuspage https://stspg.io/4dz9rv14dz14

## From the sources

On August 24th, 2026, between approximately 06:35 and 07:25 UTC, the Copilot service experienced a degradation of the Claude Fable 5 model due to an issue with our upstream provider. Users encountered elevated error rates when using Claude Fable 5, with requests sometimes failing mid-response. No other models were impacted.The issue was resolved by a mitigation put in place by our provider. GitHub is working with our provider to further improve the resiliency of the service to prevent similar incidents in the future.

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