---
id: "INC-anthropic-kw2lxj1th04c"
page: "https://infrastack.ai/live/INC-anthropic-kw2lxj1th04c"
kind: "incident"
aliases: []
title: "Anthropic: Degraded performance for Claude Fable 5.1"
severity: "medium"
cvss: null
epss: null
exploited: false
status: "resolved"
category: "vendor"
products: [{"name": "Anthropic", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["ai", "anthropic", "incident", "llm", "ops", "vendor"]
not_affected_if: []
published_at: "2026-11-08T08:28:32+00:00"
first_seen_at: "2026-11-08T08:30:34+00:00"
updated_at: "2026-11-08T08:56:01+00:00"
sources: [{"source": "statuspage", "url": "https://stspg.io/3m3q1nwb142k", "first_seen_at": "2026-11-08T08:30:34+00:00"}]
exploit_sources: []
---

# Anthropic: Degraded performance for Claude Fable 5.1

Link for people: https://infrastack.ai/live/INC-anthropic-kw2lxj1th04c (this .md is for agents)

## Affected

- vendor:Anthropic affected range not listed fixed no fixed version listed

## Timeline

- 2026-11-08T08:30:34+00:00 statuspage https://stspg.io/3m3q1nwb142k

## From the sources

The issue affecting claude.ai, the Claude API, Claude Code, and Claude Cowork has been resolved. Impact occurred from 00:18 PT / 08:18 UTC on Nov 8 to 00:32 PT / 08:32 UTC on Nov 8.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_