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minorResolvedAnthropicv5.5

Anthropic: Elevated errors for Claude Sonnet 5.5 and other models

  1. Investigating(done)
  2. Trending(skipped)
  3. Workaround available(skipped)
  4. Resolved(current)

Executive summary

Elevated error rates have been observed for Claude Sonnet 5.5 and other models, which are currently being investigated and a fix is in progress. A resolution update will be provided as soon as possible.

No verified workaround yet

This incident was resolved upstream without a reported workaround.

Technical root cause

Under active investigation. No report has identified a root cause yet.

Evidence

1 report · 1 StatusShow
  1. [1]
    Status First report
    Elevated errors for Claude Sonnet 5.5 and other models(opens official status page in a new tab)

    Investigating: We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5. We will provide an update as soon as possible. Identified: We have identified the cause of elevated errors on requests to Claude Sonnet 5.5 and are working on a fix. We will provide an update as soon as possible. Monitoring: A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery. Resolved:…

    by anthropic status

Timeline

  1. First report on status page

    Elevated errors for Claude Sonnet 5.5 and other models

    Source
  2. Official statement

    Investigating: We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5.

    Source
  3. Status changed

    Status changed: new → resolved (official status page reports resolution).