# Cerebras: Critical incident: Z.ai GLM 4.7 Service Unavailable

**Summary:** _summary pending_
- Kind: Major incident · Label: critical (vendor)
- Changed: 2026-01-26 20:51 UTC · Detected: 2026-10-19 17:03 UTC
- [Source: https://stspg.io/dh9t7y07zg47](https://stspg.io/dh9t7y07zg47)
- [Company: Cerebras](https://rewindex.com/company/cerebras.md)
- Versions: before (none: first archived) → after incident\_version:665/jhfwzy74vdpf@5c542564ce51
- Change 1 of 1 for this incident

Incident page (full timeline): [Z.ai GLM 4.7 Service Unavailable](https://rewindex.com/company/cerebras/incidents/jhfwzy74vdpf.md)
## What changed

**1. Added: Title**

```diff
+ Z.ai GLM 4.7 Service Unavailable
```

**2. Added: Impact**

```diff
+ critical
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-01-26 20:51 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-01-26 22:08 UTC
```

**6. Added: Affected components**

```diff
+ ZAI-GLM-4.7
```

**7. Added: Update** (investigating) · 2026-01-26 20:51 UTC

```diff
+ The service is currently inaccessible. We are currently working urgently to restore service capabilities. We will provide further updates as we make progress.
```

**8. Added: Update** (investigating) · 2026-01-26 21:19 UTC

```diff
+ Partial of the service has been restored, and we are currently working to resume normal service performance.
```

**9. Added: Update** (monitoring) · 2026-01-26 21:47 UTC

```diff
+ A fix has been rolled out, and we are actively monitoring the situation.
```

**10. Added: Update** (investigating) · 2026-01-26 22:08 UTC

```diff
+ Between 20:51 and 21:47 UTC users experienced service disruption with GLM 4.7. We have deployed a fix and the issue is now resolved.
```

**11. Added: Update** (resolved) · 2026-01-26 22:08 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-01-26 20:51 UTC | Critical incident: Z.ai GLM 4.7 Service Unavailable (this change) | critical |

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/ic338f465570019 · Markdown: https://rewindex.com/change/ic338f465570019.md · JSON: https://rewindex.com/api/v1/changes/ic338f465570019 · Generated 2026-10-19T23:13:14.957Z