Anthropic status page: major-impact incident hit Claude API (api.anthropic.com), Claude Code, Claude Cowork, and claude.ai, now resolved

notableSep 11 18:01Z

An incident titled "Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1" listed components Claude API (api.anthropic.com), Claude Code, Claude Cowork, and claude.ai with impact major; status is resolved.

status.claude.comSep 11 18:01Z0b234d4deec1d066e2a0e1044bffcd03af8a8a91222bd1ec4a7c57fe3571242e

Cited changes

Every field of each cited change, before and after.

added incidentElevated errors for Claude Mythos 5.1 and Claude Fable 5.1 · 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	∅	t33dncr5ydvl
incident_url	∅	https://status.claude.com/incidents/t33dncr5ydvl
provider	∅	anthropic
resolved_at	∅	2026-09-11T14:37:11.146Z
started_at	∅	2026-09-11T14:19:51.466Z
status	∅	resolved
title	∅	Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1

status.claude.comSep 11 18:01Zincident:anthropic:t33dncr5ydvl detected 2026-09-11T18:01:21.179Z

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