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Anthropic posts a major incident on Claude API (api.anthropic.com): "Elevated errors for Claude Sonnet 5.5"

notable

Anthropic's status page added an incident with impact major, now status resolved, naming the components Claude API (api.anthropic.com), Claude Code, Claude Cowork and claude.ai. A major-impact incident on the API surface is a capacity-strain signal; it reflects what the vendor chose to post, not an SLA measure.

status.claude.com1d1c34d0e6041d6d546dc8f6be0a08b1fd32ce6192e7f4b5f5c52650c46bd0a5

Cited changes

Every field of each cited change, before and after.

added incidentElevated errors for Claude Sonnet 5.5 · major · resolved

Record fields before and after the change
Field Before After
components ∅["Claude API (api.anthropic.com)","Claude Code","Claude Cowork","claude.ai"]
impact ∅major
incident_id ∅lqhknfdjrcst
incident_url ∅https://status.claude.com/incidents/lqhknfdjrcst
provider ∅anthropic
resolved_at ∅2026-10-27T15:50:17.700Z
started_at ∅2026-10-27T15:09:08.926Z
status ∅resolved
title ∅Elevated errors for Claude Sonnet 5.5
status.claude.comincident:anthropic:lqhknfdjrcst detected

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