# Anthropic: Elevated error rates on Opus 4.5

> Anthropic status incident “Elevated error rates on Opus 4.5” on 2025-12-21: impact minor (vendor’s label), 1.3 h, 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/anthropic/incidents/d2w4wfsd7fq6
Last updated: 2025-12-21T14:34:00Z

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2025-12-21 13:16 UTC · Resolved: 2025-12-21 14:34 UTC · Duration: 1.3 h
- Updates: 1
- [Vendor status page: https://status.anthropic.com/incidents/d2w4wfsd7fq6](https://status.anthropic.com/incidents/d2w4wfsd7fq6)
- [Company: Anthropic](https://rewindex.com/company/anthropic.md)

## Timeline of updates

- **resolved** 2025-12-21 14:34 UTC: This incident has been resolved.

_From the vendor’s published history: only the final update text is available for incidents before Rewindex began polling this page._

## Cite this

Status incident (vendor impact label: minor) posted by Anthropic, started 2025-12-21 13:16 UTC, resolved after 1.3 h, 1 update(s).

- Canonical URL: https://rewindex.com/company/anthropic/incidents/d2w4wfsd7fq6
- Citation: Anthropic, “Elevated error rates on Opus 4.5” (2025-12-21 13:16 UTC). Archived by Rewindex: https://rewindex.com/company/anthropic/incidents/d2w4wfsd7fq6 (CC BY 4.0).
- Markdown link: `[Anthropic: Elevated error rates on Opus 4.5 (2025-12-21)](https://rewindex.com/company/anthropic/incidents/d2w4wfsd7fq6)`


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Canonical: https://rewindex.com/company/anthropic/incidents/d2w4wfsd7fq6 · Markdown: https://rewindex.com/company/anthropic/incidents/d2w4wfsd7fq6.md · JSON: https://rewindex.com/api/v1/companies/anthropic/incidents/d2w4wfsd7fq6 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T13:40:57.415Z