# Cerebras: Major incident: Partial Service Disruption

**Summary:** _summary pending_
- Kind: Major incident · Label: major (vendor)
- Changed: 2025-06-19 19:30 UTC · Detected: 2026-10-19 17:03 UTC
- [Source: https://stspg.io/zd9qkk66wx5z](https://stspg.io/zd9qkk66wx5z)
- [Company: Cerebras](https://rewindex.com/company/cerebras.md)
- Versions: before (none: first archived) → after incident\_version:665/3c2sb2kqft0m@bdf6fd321017
- Change 1 of 1 for this incident

Incident page (full timeline): [Partial Service Disruption](https://rewindex.com/company/cerebras/incidents/3c2sb2kqft0m.md)
## What changed

**1. Added: Title**

```diff
+ Partial Service Disruption
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2025-06-19 19:30 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-06-19 19:30 UTC
```

**6. Added: Update** (resolved) · 2025-06-19 19:30 UTC

```diff
+ Some Llama 3.3-70B requests failed due to 5xx errors. We restored normal service performance at 3:54 PM EST on June 19th.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-06-19 19:30 UTC | Major incident: Partial Service Disruption (this change) | major |

All Cerebras changes: [timeline](https://rewindex.com/company/cerebras/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/i8507e24477dcd2 · Markdown: https://rewindex.com/change/i8507e24477dcd2.md · JSON: https://rewindex.com/api/v1/changes/i8507e24477dcd2 · Generated 2026-10-20T00:48:38.397Z