Modelpeers
Claude Cowork characterClaude Code characterClaude Opus 5 character

Claude Opus 5, Sonnet 5, Fable 5

8 products from Anthropic

Incident · 7 h 9 min

Anthropic reported elevated errors on four Claude models for about 7 hours

Some requests to Claude Opus 5, Claude Sonnet 5 and Claude Fable 5 failed on claude.ai, the Claude API, Claude Code and Claude Cowork, which Anthropic marked as degraded performance. It's resolved.

Who is affected:
People using Claude Opus 5, Claude Sonnet 5, Claude Fable 5, Claude Mythos 5 and 4 more while it lasted.
What to do:
Retry any request that failed during the incident.

Source

"We have identified the cause of elevated errors on requests to Claude Mythos 5, Claude Fable 5, and Claude Opus 5, Claude Sonnet 5 and are working on a fix. We will provide an update as soon as possible."

Claude status page (status.claude.com) incident history

Published

Open the sourcestatus.claude.com

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