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AnthropicIncident ·

Degraded performance for Claude Fable 5.1

ResolvedOfficial update

Claude Fable 5.1 had degraded performance. The issue affected claude.ai, the Claude API, Claude Code, and Claude Cowork. Anthropic reports that the incident is resolved.

State

Resolved

Started

Lasted

26 min

Worst impact

Degraded

Timeline

3 updates
08:2808:3508:4108:4808:54
DegradedUpdate postedTimes in UTC

Investigating

11 min 41%

Monitoring

15 min 59%

Updates

Times in UTC

As posted by Anthropic

Resolved

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.

Monitoring

A fix has been deployed for Claude Fable 5.1 and we are monitoring for recovery.

Investigating

We are investigating elevated errors on requests to Claude Fable 5.1. We will provide an update as soon as possible.

Affected components

4
claude.aiClaude API (api.anthropic.com)Claude CodeClaude Cowork

Anthropic in the last 90 days

Full history
90 days agoToday

Incidents in 90 days

49

Days with an incident

41

Median duration

1 h 2 min

This incident

58% shorter than the median

How long each incident lasted, on the day it started. The outlined bar is this incident.

6 days
median 1 h 2 min
90 days agoToday

Other Anthropic incidents

All incidents

Anthropic·Elevated errors affecting the Google Calendar connector

The issue affecting the Google Calendar connector on claude.ai, Claude Code, and Claude Cowork has been resolved. Impact occurred from 04:07 PT / 11:07 UTC on October 26 to 11:52 PT / 18:52 UTC on October 28.

Resolved

Anthropic·Elevated errors affecting the Gmail connector

The issue affecting the Gmail connector on claude.ai, Claude Code, and Claude Cowork has been resolved. Impact occurred from 16:00 PT / 23:00 UTC on October 27 to 22:29 PT on October 27 / 05:29 UTC on October 28.

Resolved

Anthropic·Elevated errors for Claude Sonnet 5.5

The issue affecting claude.ai, the Claude API, Claude Code, and Claude Cowork has been resolved. Impact occurred from 07:42 PT / 14:42 UTC to 08:17 PT / 15:17 UTC.

Resolved

Anthropic·Elevated errors for Claude Sonnet 5.5

The issue affecting Claude services has been resolved.

Resolved

Anthropic·Elevated errors for Claude Fable 5.1

The issue affecting Claude services has been resolved. Impact occurred from 01:08 PT / 08:08 UTC to 01:29 PT / 08:29 UTC.

Resolved

Follow Anthropic

Your coding agent knows when Anthropic is down, and tells you when a failure is theirs, not yours. You can also get Anthropic incidents in a feed reader or in Slack.

Prompt
Install the outages.live MCP server, so that when something breaks you can tell if the cause is a provider we depend on and not my code. It reads the official status pages of cloud, AI, payment and developer providers and gives you their incidents as MCP tools.

Add it as a remote MCP server named "outages" at https://outages.live/mcp (Streamable HTTP, no authentication), with your CLI command or your MCP config file.

Then:
1. Make sure it connects and shows the tools get_provider, list_feed and send_feedback.
2. Call get_provider with "anthropic" and tell me if Anthropic has a problem right now.
3. From now on, when a call to a third-party service fails or becomes slow, call get_provider for that service before you change my code.

Paste this into any coding agent. It adds the server with its own MCP setup.

RSS
https://outages.live/feed.xml?providers=anthropic
Slack
/feed subscribe https://outages.live/feed.xml?providers=anthropic

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