---
id: "INC-anthropic-njk29r81v3wg"
kind: "incident"
aliases: []
title: "Anthropic: Degraded performance for Claude Fable 5"
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: "2026-10-21T19:49:06+00:00"
first_seen_at: "2026-10-23T19:12:22+00:00"
updated_at: "2026-10-23T20:09:50+00:00"
sources: [{"source": "statuspage", "url": "https://stspg.io/cgklr4v2sgkh", "first_seen_at": "2026-10-23T19:12:22+00:00"}]
---

# Anthropic: Degraded performance for Claude Fable 5

## Affected

- vendor:Anthropic affected ? fixed ?

## Timeline

- 2026-10-23T19:12:22+00:00 statuspage https://stspg.io/cgklr4v2sgkh

## From the sources

The issue affecting other Claude models has been resolved.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_