# Anthropic: Elevated errors on Claude 4 Sonnet

> Anthropic status incident “Elevated errors on Claude 4 Sonnet” on 2025-09-16: impact minor (vendor’s label), 1.5 h, 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/anthropic/incidents/s1cd6vc8wms9
Last updated: 2025-09-16T08:32:00Z

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2025-09-16 07:02 UTC · Resolved: 2025-09-16 08:32 UTC · Duration: 1.5 h
- Updates: 1
- [Vendor status page: https://status.anthropic.com/incidents/s1cd6vc8wms9](https://status.anthropic.com/incidents/s1cd6vc8wms9)
- [Company: Anthropic](https://rewindex.com/company/anthropic.md)

## Timeline of updates

- **resolved** 2025-09-16 08:32 UTC: As of 1:05 PT / 8:05 UTC the errors are back to the baseline.

_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 2025-09-16 07:02 UTC, resolved after 1.5 h, 1 update(s).

- Canonical URL: https://rewindex.com/company/anthropic/incidents/s1cd6vc8wms9
- Citation: Anthropic, “Elevated errors on Claude 4 Sonnet” (2025-09-16 07:02 UTC). Archived by Rewindex: https://rewindex.com/company/anthropic/incidents/s1cd6vc8wms9 (CC BY 4.0).
- Markdown link: `[Anthropic: Elevated errors on Claude 4 Sonnet (2025-09-16)](https://rewindex.com/company/anthropic/incidents/s1cd6vc8wms9)`


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Canonical: https://rewindex.com/company/anthropic/incidents/s1cd6vc8wms9 · Markdown: https://rewindex.com/company/anthropic/incidents/s1cd6vc8wms9.md · JSON: https://rewindex.com/api/v1/companies/anthropic/incidents/s1cd6vc8wms9 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T16:26:01.898Z