Elevated errors for Claude Sonnet 5.5 and other models

Anthropic Claude

1. today 06:35 UTCMonitoringA fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.
2. today 06:27 UTCIdentifiedWe have identified the cause of elevated errors on requests to Claude Sonnet 5.5 and are working on a fix. We will provide an update as soon as possible.
3. today 06:14 UTCInvestigatingWe are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5. We will provide an update as soon as possible.
4. today 06:39 UTC ChangeIntel noticed a new title; it was "Elevated errors for Claude Sonnet 5.5"
5. today 06:29 UTC ChangeIntel noticed a new title; it was "Elevated errors for multiple models"

1. 25 Oct 2026 · 06:39:12 UTC StageIdentified → Monitoring
2. 25 Oct 2026 · 06:39:12 UTC SummaryWe have identified the cause of elevated errors on requests to Claude Sonnet 5.5 and are working on a fix. We will provide an update as soon as possible. → A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.
3. 25 Oct 2026 · 06:39:12 UTC TitleElevated errors for Claude Sonnet 5.5 → Elevated errors for Claude Sonnet 5.5 and other models
4. 25 Oct 2026 · 06:29:09 UTC StageInvestigating → Identified
5. 25 Oct 2026 · 06:29:09 UTC SummaryWe are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5. We will provide an update as soon as possible. → We have identified the cause of elevated errors on requests to Claude Sonnet 5.5 and are working on a fix. We will provide an update as soon as possible.
6. 25 Oct 2026 · 06:29:09 UTC TitleElevated errors for multiple models → Elevated errors for Claude Sonnet 5.5

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