AI Chat Assistants · reliability comparison

Claude vs Microsoft Copilot: which is more reliable? (2026)

Microsoft Copilot is more reliable than Claude, scoring 100.0 vs 57.0 out of 100. Over the last 90 days Claude reported 39 incidents and Microsoft Copilot reported 0, with effective uptime of 99.25% and 100% respectively.

Data updated Nov 1, 2026 · How we score

Claude

57.0/100

Operational

Visit Claude ↗

Microsoft Copilot

100.0/100

Operational

Visit Microsoft Copilot ↗
VS
MetricClaudeMicrosoft Copilot
Reliability score57.0100.0
Rank (AI chat assistants)#5—
Uptime (90 days)99.25%100%
Incidents (90 days)390
Partial / major outages210
Avg time to resolve1h 24m—
Outages we detected00
Transparency score100/100100/100

Where Claude and Microsoft Copilot differ

  • Microsoft Copilot reported no incidents in the last 90 days, while Claude reported 39.
  • Claude had 21 partial or major outages, compared with 0 for Microsoft Copilot.

90-day uptime

Claude

Aug 5, 2026: 95.32% uptime, 2 incidents (Degraded performance)Aug 6, 2026 – Aug 11, 2026: no incidentsAug 12, 2026: 97.32% uptime, 1 incident (Degraded performance)Aug 13, 2026: 96.70% uptime, 1 incident (Partial outage)Aug 14, 2026: 99.90% uptime, 1 incident (Partial outage)Aug 15, 2026: 99.04% uptime, 1 incident (Partial outage)Aug 16, 2026: 97.52% uptime, 1 incident (Major outage)Aug 17, 2026: 99.03% uptime, 1 incident (Degraded performance)Aug 18, 2026: 98.31% uptime, 1 incident (Degraded performance)Aug 19, 2026: 99.16% uptime, 1 incident (Degraded performance)Aug 20, 2026: 98.78% uptime, 2 incidents (Partial outage)Aug 21, 2026 – Aug 23, 2026: no incidentsAug 24, 2026: 92.72% uptime, 3 incidents (Partial outage)Aug 25, 2026 – Aug 30, 2026: no incidentsAug 31, 2026: 98.91% uptime, 2 incidents (Degraded performance)Sep 1, 2026: 99.15% uptime, 2 incidents (Degraded performance)Sep 2, 2026: 99.08% uptime, 1 incident (Partial outage)Sep 3, 2026: 93.19% uptime, 2 incidents (Partial outage)Sep 4, 2026 – Sep 10, 2026: no incidentsSep 11, 2026: 99.39% uptime, 1 incident (Partial outage)Sep 12, 2026 – Sep 14, 2026: no incidentsSep 15, 2026: 97.00% uptime, 1 incident (Partial outage)Sep 16, 2026 – Sep 21, 2026: no incidentsSep 22, 2026: 96.59% uptime, 1 incident (Partial outage)Sep 23, 2026 – Sep 28, 2026: no incidentsSep 29, 2026: 95.63% uptime, 1 incident (Partial outage)Sep 30, 2026 – Oct 4, 2026: no incidentsOct 5, 2026: 99.44% uptime, 1 incident (Partial outage)Oct 6, 2026: 99.35% uptime, 1 incident (Partial outage)Oct 7, 2026 – Oct 20, 2026: no incidentsOct 21, 2026: 99.58% uptime, 1 incident (Degraded performance)Oct 22, 2026: 97.32% uptime, 1 incident (Degraded performance)Oct 23, 2026: 98.45% uptime, 1 incident (Major outage)Oct 24, 2026: 97.74% uptime, 3 incidents (Major outage)Oct 25, 2026: 95.42% uptime, 2 incidents (Partial outage)Oct 26, 2026: no incidentsOct 27, 2026: 97.10% uptime, 2 incidents (Partial outage)Oct 28, 2026: 96.51% uptime, 2 incidents (Degraded performance)Oct 29, 2026 – Nov 2, 2026: no incidents
90 days ago99.264% average daily uptimeToday

Microsoft Copilot

Aug 5, 2026 – Nov 2, 2026: no incidents
90 days ago100% average daily uptimeToday

Recent Claude incidents

Full Claude reliability report →

Recent Microsoft Copilot incidents

No incidents reported by Microsoft Copilot in the last 90 days.

Full Microsoft Copilot reliability report →

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