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GitHub Status – Inconsistent results when using the Haiku 4.5 model

Inconsistent results when using the Haiku 4.5 model

Incident Report for GitHub

Resolved

From October 28th at 16:03 UTC until 17:11 UTC, the Copilot service experienced degradation due to an infrastructure issue which impacted the Claude Haiku 4.5 model, leading to a spike in errors affecting 1% of users. No other models were impacted. The incident was caused due to an outage with an upstream provider. We are working to improve redundancy during future occurrences.

Posted Oct 28, 2025 - 17:11 UTC

Update

The issues with our upstream model provider have been resolved, and Claude Haiku 4.5 is once again available in Copilot Chat and across IDE integrations.

We will continue monitoring to ensure stability, but mitigation is complete.

Posted Oct 28, 2025 - 17:11 UTC

Update

Usage of the Haiku 4.5 model with Copilot experiences is currently degraded. We are investigating and working to remediate. Other models should be unaffected.

Posted Oct 28, 2025 - 16:42 UTC

Investigating

We are currently investigating this issue.

Posted Oct 28, 2025 - 16:39 UTC