AI outage calendar – Claude (Anthropic)

Every incident published on official AI status pages, archived permanently — even after vendors remove them. Pick a month, click a day to see what broke.

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July 2026

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This month

13 official incidents this month · 4 days with major outages · times in UTC

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Major / criticalMinorOther / maintenanceSeen by our probesClick a day to see its incidents

Fri, Jul 31 1↑ Calendar

Degraded performance on Claude Sonnet 5

Claude (Anthropic) · Details · 06:18–07:04 · impact: minor · lasted 47 min

Thu, Jul 30 2↑ Calendar

Degraded performance on Claude Opus 4.8

Claude (Anthropic) · Details · 13:43–14:24 · impact: minor · lasted 41 min

Elevated errors across many models

Claude (Anthropic) · Details · 05:57–10:48 · impact: major · lasted 4.9 h

Wed, Jul 29 1↑ Calendar

Elevated errors across all models

Claude (Anthropic) · Details · 19:49–22:36 · impact: critical · lasted 2.8 h

Mon, Jul 27 3↑ Calendar

Elevated errors on Claude Opus 5 and Haiku 4.5

Claude (Anthropic) · Details · 13:39–14:36 · impact: minor · lasted 57 min

Elevated errors on Claude Opus 5

Claude (Anthropic) · Details · 11:27–12:30 · impact: minor · lasted 1 h

Elevated errors on Claude Opus 5

Claude (Anthropic) · Details · 08:16–09:05 · impact: minor · lasted 48 min

Sun, Jul 26 1↑ Calendar

Elevated errors for Opus 5

Claude (Anthropic) · Details · 09:17–10:44 · impact: major · lasted 1.5 h

Sat, Jul 25 3↑ Calendar

Elevated errors for Claude Fable 5, Claude Sonnet 5, Claude Haiku 4.5, and other models

Claude (Anthropic) · Details · 21:34–22:08 · impact: major · lasted 34 min

Elevated errors for Mythos 5, Fable 5, Opus 5 and Claude Haiku 4.5

Claude (Anthropic) · Details · 18:40–19:44 · impact: major · lasted 1.1 h

Sonnet 4.6 and Sonnet 5 errors elevated

Claude (Anthropic) · Details · 18:13–18:13 · impact: none · lasted 1 min

Fri, Jul 24 2↑ Calendar

Elevated error rate on Opus 4.8

Claude (Anthropic) · Details · 09:09–10:22 · impact: minor · lasted 1.2 h

Microsoft Office add-in availability

Claude (Anthropic) · Details · 07-22 17:56–15:36 · impact: none · lasted 1.9 d

Thu, Jul 23 1↑ Calendar

Microsoft Office add-in availability

Claude (Anthropic) · Details · 07-22 17:56–07-24 15:36 · impact: none · lasted 1.9 d

Wed, Jul 22 1↑ Calendar

Microsoft Office add-in availability

Claude (Anthropic) · Details · 17:56–07-24 15:36 · impact: none · lasted 1.9 d