GitHub: Claude Fable 5 experiencing degraded performance
GitHub outage, Jul 16, 2026 · 14 vendors, 16 incidents
GitHub’s incident is the root of the event (the provider’s own post). (root, posted +0 min vs GitHub’s own post)
Swipe sideways to see the whole diagram.
Mermaid source
flowchart LR
root["GitHub<br/>posted 21:05 UTC"]:::root
h1["Within an hour<br/>1 vendor<br/>Sentry"]:::names
root --> h1
h4["1 to 4 hours later<br/>7 vendors, 5 blamed GitHub<br/>Render, CodeRabbit, CircleCI, Bitrise +3"]:::blames
root --> h4
class root meFull event: timeline, evidence and all vendors →
Detected automatically from incidents that started together and named the same provider. A link means one vendor’s incident named another, not a confirmed cause.
Timeline of updates
- resolved
On July 16, 2026, GitHub Copilot users experienced elevated errors when using Claude Fable 5 from 17:33 UTC until mitigation at 22:04 UTC. The average error rate was 1.4%, with a maximum error rate of 30.85%. The issue was caused by degradation at an upstream model provider; other Copilot models were not significantly affected, and users could avoid the impact by selecting another model or Auto. Service recovered after the provider mitigated the degradation.
From GitHub’s published incident history: for incidents before Rewindex began polling this status page, only the final update text is available.
Impact, status and times are the vendor’s own, as last archived. View on www.githubstatus.com (opens in new tab).