# Anthropic: Incident updated: Elevated errors for Claude Sonnet 5.5

**Summary:** _summary pending_
- Kind: Incident update · Label: not classified yet
- Changed: 2026-10-25 06:34 UTC · Detected: 2026-10-25 06:34 UTC
- [Source: https://status.claude.com/incidents/334jvgbrc4ff](https://status.claude.com/incidents/334jvgbrc4ff)
- [Company: Anthropic](https://rewindex.com/company/anthropic.md)
- Versions: before incident\_version:1/334jvgbrc4ff@67b995c0e71f → after incident\_version:1/334jvgbrc4ff@3ec5de856a3c
- Change 2 of 4 for this incident

## Discussed on Hacker News

- [Elevated errors for Claude Sonnet 5.5](https://news.ycombinator.com/item?id=50228908): 1 points, 1 comments, posted 2026-10-25 06:36 UTC, posted 22 min after the vendor’s first update

Incident page (full timeline): [Elevated errors for Claude Sonnet 5.5](https://rewindex.com/company/anthropic/incidents/334jvgbrc4ff.md)
## What changed

**1. Changed: Title**

```diff
- Elevated errors for multiple models
+ Elevated errors for Claude Sonnet 5.5
```

**2. Changed: Status**

```diff
- investigating
+ identified
```

**3. Added: Update** (identified) · 2026-10-25 06:27 UTC

```diff
+ 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.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-10-25 06:14 UTC | [Major incident: Elevated errors for multiple models](https://rewindex.com/change/ifa13eb92497c13.md) | major |
| 2026-10-25 06:34 UTC | Incident updated: Elevated errors for Claude Sonnet 5.5 (this change) |  |
| 2026-10-25 06:43 UTC | [Incident updated: Elevated errors for Claude Sonnet 5.5 and other models](https://rewindex.com/change/rcb49fd8c32e091.md) |  |
| 2026-10-25 08:03 UTC | [Incident updated: Elevated errors for Claude Sonnet 5.5 and other models](https://rewindex.com/change/r1cde1c7b4c8d54.md) |  |

Previous: [change](https://rewindex.com/change/ifa13eb92497c13.md) · Next: [change](https://rewindex.com/change/rcb49fd8c32e091.md) · All Anthropic changes: [timeline](https://rewindex.com/company/anthropic/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/r036167ecb0043f · Markdown: https://rewindex.com/change/r036167ecb0043f.md · JSON: https://rewindex.com/api/v1/changes/r036167ecb0043f · Generated 2026-10-25T10:01:04.134Z