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mediumResolvedAnthropic

Anthropic: Degraded performance for Claude Fable 5.1

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

Executive summary

Anthropic investigated and resolved an issue causing degraded performance and elevated errors on requests to Claude Fable 5.1. The incident has now been marked as resolved.

No verified workaround yet

This incident was resolved upstream without a reported workaround.

Official fix
Technical root cause

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

Evidence

3 reports · 1 Status, 2 BlueskyShow
  1. [1]
    Status First report
    Degraded performance for Claude Fable 5.1(opens official status page in a new tab)

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

    by anthropic status

  2. [2]
    Bluesky
    ⚠️ Claude is reporting an incident: Degraded performance for Claude Fable 5.1(opens the official status page in a new tab)

    ⚠️ Claude is reporting an incident: Degraded performance for Claude Fable 5.1 Investigating: We are investigating elevated errors on requests to Claude Fable 5.1. We will provide an update as soon as possible. t.lpl.dev/327pdSU

    by telescope.littleplanetlabs.comOpens the official status page 0upvotes 1comments97% match

  3. [3]
    Bluesky
    ✅ Resolved: Claude - Degraded performance for Claude Fable 5.1(opens the official status page in a new tab)

    ✅ Resolved: Claude - Degraded performance for Claude Fable 5.1

    by telescope.littleplanetlabs.comOpens the official status page 1upvotes 0comments89% match

Timeline

  1. First report on status page

    Degraded performance for Claude Fable 5.1

    Source
  2. Official statement

    Investigating: We are investigating elevated errors on requests to Claude Fable 5.1.

    Source
  3. Confirmed on Bluesky post

    ⚠️ Claude is reporting an incident: Degraded performance for Claude Fable 5.1

    Source
  4. Official statement

    ⚠️ Claude is reporting an incident: Degraded performance for Claude Fable 5.1 Investigating: We are investigating elevated errors on requests to Claude Fable 5.1.

    Source
  5. Official statement

    ✅ Resolved: Claude - Degraded performance for Claude Fable 5.1

    Source
  6. Status changed

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