# Cerebras: Major incident: Partial Service Disruption

**Summary:** _summary pending_
- Kind: Major incident · Label: major (vendor)
- Changed: 2025-06-08 03:30 UTC · Detected: 2026-10-19 17:03 UTC
- [Source: https://stspg.io/fm44s5wwh871](https://stspg.io/fm44s5wwh871)
- [Company: Cerebras](https://rewindex.com/company/cerebras.md)
- Versions: before (none: first archived) → after incident\_version:665/cxz5sqlr0bpx@10746621f981
- Change 1 of 1 for this incident

Incident page (full timeline): [Partial Service Disruption](https://rewindex.com/company/cerebras/incidents/cxz5sqlr0bpx.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
+ 2025-06-08 03:30 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-06-08 03:30 UTC
```

**6. Added: Update** (resolved) · 2025-06-08 03:30 UTC

```diff
+ Some Llama 3.3-70B prompts contained corrupt responses. We restored normal service performance at 1 AM PST on June 9th.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-06-08 03:30 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/i6a2b013a67ce94 · Markdown: https://rewindex.com/change/i6a2b013a67ce94.md · JSON: https://rewindex.com/api/v1/changes/i6a2b013a67ce94 · Generated 2026-10-20T00:00:08.056Z