# Anthropic: Elevated errors for Claude Fable 5.1

> Anthropic reported a major incident involving elevated errors for Claude Fable 5.1 across claude.ai, Claude API - api.anthropic.com, Claude Code and Claude Cowork, starting 2026-10-25 08:17 UTC. It remained open when archived (open for 0 min at the last update); Anthropic said it identified the caus

Canonical: https://rewindex.com/company/anthropic/incidents/vx06kp8wfpq2
Last updated: 2026-10-26T09:19:36Z

- Impact (vendor’s label): major
- Status: resolved · edited after publishing
- Started: 2026-10-25 08:17 UTC · Resolved: 2026-10-25 08:49 UTC · Duration: 32 min
- Updates: 4 · Affected components: claude.ai, Claude API - api.anthropic.com, Claude Code, Claude Cowork
- [Vendor status page: https://status.claude.com/incidents/vx06kp8wfpq2](https://status.claude.com/incidents/vx06kp8wfpq2)
- [Company: Anthropic](https://rewindex.com/company/anthropic.md)

## Summary

Anthropic reported a major incident involving elevated errors for Claude Fable 5.1 across claude.ai, Claude API - api.anthropic.com, Claude Code and Claude Cowork, starting 2026-10-25 08:17 UTC. It remained open when archived (open for 0 min at the last update); Anthropic said it identified the cause and was working on a fix, without detailing either. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2026-10-25 08:17 UTC: We are investigating elevated errors on requests to Claude Fable 5.1. We will provide an update as soon as possible.
- **identified** 2026-10-25 08:17 UTC: We have identified the cause of elevated errors on requests to Claude Fable 5.1 and are working on a fix. We will provide an update as soon as possible.
- **monitoring** 2026-10-25 08:30 UTC: A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.
- **resolved** 2026-10-25 08:49 UTC: The issue affecting Claude services has been resolved. Impact occurred from 01:08 PT / 08:08 UTC to 01:29 PT / 08:29 UTC.

## Rewindex changes for this incident

- 2026-10-25 08:17 UTC: [Major incident: Elevated errors for Claude Fable 5.1](https://rewindex.com/change/ib2458fe7a95d4f.md)
- 2026-10-25 08:34 UTC: [Incident updated: Elevated errors for Claude Fable 5.1](https://rewindex.com/change/r9b6668c94ae8e0.md)
- 2026-10-25 08:54 UTC: [Incident updated: Elevated errors for Claude Fable 5.1](https://rewindex.com/change/r26d7d7e47e471e.md)


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Canonical: https://rewindex.com/company/anthropic/incidents/vx06kp8wfpq2 · Markdown: https://rewindex.com/company/anthropic/incidents/vx06kp8wfpq2.md · JSON: https://rewindex.com/api/v1/companies/anthropic/incidents/vx06kp8wfpq2 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T09:19:36.563Z