# Grammarly: Major incident: Supehuman Go and AI Chat experience temporary service interruption

**Summary:** Grammarly reported a major service interruption affecting Supehuman Go and AI Chat, with Generative AI assistance, Grammarly Editor, and Grammarly's Browser Extension listed as affected components. It started at 2026-01-21 00:40 UTC and was resolved at 2026-01-21 01:48 UTC, lasting 1 h 8 min; no cause or specific fix was stated. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-01-21 00:40 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/tvqnj2lw81cn](https://stspg.io/tvqnj2lw81cn)
- [Company: Grammarly](https://rewindex.com/company/grammarly.md)
- Versions: before (none: first archived) → after incident\_version:21/k8wbyk3vxxcc@4bdae7153329
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Supehuman Go and AI Chat experience temporary service interruption
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-01-21 00:40 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-01-21 01:48 UTC
```

**6. Added: Affected components**

```diff
+ Generative AI assistance, Grammarly Editor, Grammarly's Browser Extension
```

**7. Added: Update** (investigating) · 2026-01-21 00:40 UTC

```diff
+ We are currently investigating this issue.
```

**8. Added: Update** (resolved) · 2026-01-21 01:48 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-01-21 00:40 UTC | Major incident: Supehuman Go and AI Chat experience temporary service interruption (this change) | outage |

All Grammarly changes: [timeline](https://rewindex.com/company/grammarly/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/i7917f387af6f35 · Markdown: https://rewindex.com/change/i7917f387af6f35.md · JSON: https://rewindex.com/api/v1/changes/i7917f387af6f35 · Generated 2026-10-18T02:55:16.405Z