# Claude: Major incident: Elevated errors for Claude Fable 5

**Summary:** Claude reported elevated errors for Claude Fable 5 affecting claude.ai, with major impact. The incident started at 2026-08-14 23:57 UTC and was resolved at 2026-08-15 00:27 UTC (30 min). The resolution update separately stated customer impact occurred from 20:00 Aug 14, 2026 to 00:11 Aug 15, 2026 UTC. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-08-14 23:57 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/vpnnwf2vhdv4](https://stspg.io/vpnnwf2vhdv4)
- [Company: Claude](https://rewindex.com/company/claude.md)
- Versions: before (none: first archived) → after incident\_version:6/hdynq1pc0fn8@9f121e15c3cc
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Elevated errors for Claude Fable 5
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-08-14 23:57 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-08-15 00:27 UTC
```

**6. Added: Affected components**

```diff
+ claude.ai
```

**7. Added: Update** (identified) · 2026-08-14 23:57 UTC

```diff
+ We have identified the cause of elevated errors on requests to Claude Fable 5 and are working on a fix. We will provide an update as soon as possible.
```

**8. Added: Update** (identified) · 2026-08-15 00:20 UTC

```diff
+ We have identified the cause of the issue affecting claude.ai and are working on a fix. We will provide an update as soon as possible.
```

**9. Added: Update** (identified) · 2026-08-15 00:21 UTC

```diff
+ We have identified the cause of the issue affecting Claude services and are working on a fix. We will provide an update as soon as possible.
```

**10. Added: Update** (resolved) · 2026-08-15 00:27 UTC

```diff
+ The issue affecting Claude services has been resolved. Impact occurred from 20:00 Aug 14, 2026 to 00:11 Aug 15 , 2026 UTC.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-08-14 23:57 UTC | Major incident: Elevated errors for Claude Fable 5 (this change) | outage |

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._


---
Canonical: https://rewindex.com/change/i7cb4356ce2279c · Markdown: https://rewindex.com/change/i7cb4356ce2279c.md · JSON: https://rewindex.com/api/v1/changes/i7cb4356ce2279c · Generated 2026-10-18T02:54:56.155Z