Copilot model Claude Fable 5 experiencing elevated errors
This summary is created by Generative AI and may differ from the actual content.
Overview
Claude Fable 5 model in GitHub Copilot experienced degraded availability for approximately 73 minutes, from 08:33 to 09:46 UTC on July 30, 2026. During this time, requests to Claude Fable 5 in Copilot chat and IDE surfaces frequently failed or timed out. Other Copilot models were not affected, and users could continue working by selecting another model or 'Auto'. Availability fully recovered once the upstream model provider resolved their outage.
Impact
Degraded availability for Claude Fable 5 model affecting Copilot chat and IDE surfaces for approximately 73 minutes. Users experienced frequent failures and timeouts when using Claude Fable 5, though they could mitigate by switching to alternative models.
Trigger
An issue with an upstream model provider caused the degraded availability of Claude Fable 5.
Detection
Reports of degraded performance for Copilot AI Model Providers were received and investigated starting at 09:07 UTC. By 09:17 UTC, the issue was identified as degraded availability for Claude Fable 5 due to an upstream model provider issue.
Resolution
GitHub Copilot team worked with the upstream model provider to resolve the issue. Users were advised to select another model or 'Auto' to continue using Copilot during the outage. Availability fully recovered once the provider resolved their outage at 09:46 UTC, with resolution confirmed at 10:12 UTC.
Root Cause
An issue with an upstream model provider caused the degraded availability and failures for the Claude Fable 5 model.