# Claude: Major incident: Elevated errors for multiple models

**Summary:** _summary pending_
- Kind: Major incident · Label: major (vendor)
- Changed: 2026-10-25 06:14 UTC · Detected: 2026-10-25 06:23 UTC
- [Source: https://status.claude.com/incidents/334jvgbrc4ff](https://status.claude.com/incidents/334jvgbrc4ff)
- [Company: Claude](https://rewindex.com/company/claude.md)
- Versions: before (none: first archived) → after incident\_version:6/334jvgbrc4ff@67b995c0e71f
- Change 1 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 multiple models](https://rewindex.com/company/claude/incidents/334jvgbrc4ff.md)
## What changed

**1. Added: Title**

```diff
+ Elevated errors for multiple models
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ investigating
```

**4. Added: Start time**

```diff
+ 2026-10-25 06:14 UTC
```

**5. Added: Affected components**

```diff
+ claude.ai, Claude API - api.anthropic.com, Claude Code, Claude Cowork
```

**6. Added: Update** (investigating) · 2026-10-25 06:14 UTC

```diff
+ We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5. 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 (this change) | major |
| 2026-10-25 06:34 UTC | [Incident updated: Elevated errors for Claude Sonnet 5.5](https://rewindex.com/change/rf2e88cd46e0b9d.md) |  |
| 2026-10-25 06:43 UTC | [Incident updated: Elevated errors for Claude Sonnet 5.5 and other models](https://rewindex.com/change/re8e598fea508b4.md) |  |
| 2026-10-25 08:03 UTC | [Incident updated: Elevated errors for Claude Sonnet 5.5 and other models](https://rewindex.com/change/r07b90793a264ae.md) |  |

Next: [change](https://rewindex.com/change/rf2e88cd46e0b9d.md) · All Claude changes: [timeline](https://rewindex.com/company/claude/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/i44f3710e67031f · Markdown: https://rewindex.com/change/i44f3710e67031f.md · JSON: https://rewindex.com/api/v1/changes/i44f3710e67031f · Generated 2026-10-25T10:01:27.325Z