# Cerebras: Major incident: Partial Service Disruption

**Summary:** _summary pending_
- Kind: Major incident · Label: major (vendor)
- Changed: 2025-09-12 19:13 UTC · Detected: 2026-10-19 17:03 UTC
- [Source: https://stspg.io/mgflb999gngz](https://stspg.io/mgflb999gngz)
- [Company: Cerebras](https://rewindex.com/company/cerebras.md)
- Versions: before (none: first archived) → after incident\_version:665/m2zflgpzxzp0@5a315170900c
- Change 1 of 1 for this incident

Incident page (full timeline): [Partial Service Disruption](https://rewindex.com/company/cerebras/incidents/m2zflgpzxzp0.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
+ 2025-09-12 19:13 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-09-12 20:38 UTC
```

**6. Added: Affected components**

```diff
+ GPT-OSS-120B, Qwen-3-480B-Coder
```

**7. Added: Update** (investigating) · 2025-09-12 19:13 UTC

```diff
+ Some users are seeing intermittent 404 errors starting around 8 AM PT on 9/12/2025 due to an API gateway routing issue. Engineering is investigating and is working on a prompt resolution.
```

**8. Added: Update** (resolved) · 2025-09-12 20:38 UTC

```diff
+ This incident has been resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-09-12 19:13 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._


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Canonical: https://rewindex.com/change/i1b2a87d552f39a · Markdown: https://rewindex.com/change/i1b2a87d552f39a.md · JSON: https://rewindex.com/api/v1/changes/i1b2a87d552f39a · Generated 2026-10-19T23:13:23.809Z