AI Chat Assistants · reliability comparison

ChatGPT vs Claude: which is more reliable? (2026)

Claude is more reliable than ChatGPT, scoring 57.0 vs 32.2 out of 100. Over the last 90 days ChatGPT reported 84 incidents and Claude reported 39, with effective uptime of 96.85% and 99.25% respectively. Claude resolves incidents faster on average (1h 24m).

Data updated Nov 2, 2026 · How we score

ChatGPT

32.2/100

Operational

Visit ChatGPT ↗

Claude

57.0/100

Operational

Visit Claude ↗
VS
MetricChatGPTClaude
Reliability score32.257.0
Rank (AI chat assistants)#7#5
Uptime (90 days)96.85%99.25%
Incidents (90 days)8439
Partial / major outages921
Avg time to resolve6h 19m1h 24m
Outages we detected00
Transparency score100/100100/100

Where ChatGPT and Claude differ

  • ChatGPT reported 2.2× as many incidents as Claude over the last 90 days (84 vs 39).
  • Claude had 21 partial or major outages, compared with 9 for ChatGPT.
  • Claude fixes problems faster: 1h 24m on average, against 6h 19m for ChatGPT (4.5× quicker).
  • ChatGPT's longest outage on record lasted 9h 54m (Oct 7, 2026); Claude's lasted 3h 24m (Aug 24, 2026).

90-day uptime

ChatGPT

Aug 5, 2026: 94.71% uptime, 3 incidents (Degraded performance)Aug 6, 2026 – Aug 9, 2026: no incidentsAug 10, 2026: 93.30% uptime, 2 incidents (Degraded performance)Aug 11, 2026: 96.22% uptime, 4 incidents (Degraded performance)Aug 12, 2026: no incidentsAug 13, 2026: 93.80% uptime, 2 incidents (Degraded performance)Aug 14, 2026 – Aug 17, 2026: no incidentsAug 18, 2026: 99.78% uptime, 1 incident (Degraded performance)Aug 19, 2026: no incidentsAug 20, 2026: 97.62% uptime, 2 incidents (Degraded performance)Aug 21, 2026: 96.68% uptime, 1 incident (Degraded performance)Aug 22, 2026 – Aug 26, 2026: no incidentsAug 27, 2026: 97.35% uptime, 1 incident (Degraded performance)Aug 28, 2026 – Aug 30, 2026: no incidentsAug 31, 2026: 88.75% uptime, 1 incident (Partial outage)Sep 1, 2026: 99.77% uptime, 1 incident (Degraded performance)Sep 2, 2026: 99.67% uptime, 1 incident (Degraded performance)Sep 3, 2026: 98.39% uptime, 2 incidents (Partial outage)Sep 4, 2026: 97.64% uptime, 1 incident (Degraded performance)Sep 5, 2026 – Sep 7, 2026: no incidentsSep 8, 2026: 95.34% uptime, 2 incidents (Degraded performance)Sep 9, 2026: 98.80% uptime, 2 incidents (Degraded performance)Sep 10, 2026: 91.19% uptime, 3 incidents (Degraded performance)Sep 11, 2026: 93.74% uptime, 2 incidents (Degraded performance)Sep 12, 2026: 98.77% uptime, 1 incident (Degraded performance)Sep 13, 2026: 98.55% uptime, 2 incidents (Degraded performance)Sep 14, 2026: 88.72% uptime, 3 incidents (Degraded performance)Sep 15, 2026: 97.57% uptime, 2 incidents (Degraded performance)Sep 16, 2026: 99.47% uptime, 1 incident (Degraded performance)Sep 17, 2026: 96.27% uptime, 2 incidents (Partial outage)Sep 18, 2026: 98.50% uptime, 3 incidents (Degraded performance)Sep 19, 2026: 95.07% uptime, 2 incidents (Degraded performance)Sep 20, 2026 – Sep 21, 2026: no incidentsSep 22, 2026: 99.02% uptime, 2 incidents (Degraded performance)Sep 23, 2026: 99.31% uptime, 2 incidents (Degraded performance)Sep 24, 2026: 99.51% uptime, 1 incident (Degraded performance)Sep 25, 2026 – Sep 28, 2026: no incidentsSep 29, 2026: 96.13% uptime, 2 incidents (Degraded performance)Sep 30, 2026: 85.00% uptime, 3 incidents (Degraded performance)Oct 1, 2026: 83.70% uptime, 3 incidents (Partial outage)Oct 2, 2026: 88.82% uptime, 2 incidents (Degraded performance)Oct 3, 2026 – Oct 4, 2026: no incidentsOct 5, 2026: 89.41% uptime, 5 incidents (Degraded performance)Oct 6, 2026: 93.31% uptime, 7 incidents (Degraded performance)Oct 7, 2026: 76.97% uptime, 4 incidents (Partial outage)Oct 8, 2026: 99.02% uptime, 1 incident (Degraded performance)Oct 9, 2026: 91.50% uptime, 3 incidents (Partial outage)Oct 10, 2026: 84.35% uptime, 2 incidents (Partial outage)Oct 11, 2026: 85.00% uptime, 1 incident (Degraded performance)Oct 12, 2026: 89.97% uptime, 1 incident (Degraded performance)Oct 13, 2026: 94.72% uptime, 1 incident (Degraded performance)Oct 14, 2026: 93.88% uptime, 2 incidents (Degraded performance)Oct 15, 2026: 81.43% uptime, 2 incidents (Partial outage)Oct 16, 2026: 93.28% uptime, 1 incident (Degraded performance)Oct 17, 2026 – Oct 18, 2026: no incidentsOct 19, 2026: 99.56% uptime, 1 incident (Degraded performance)Oct 20, 2026: 97.91% uptime, 1 incident (Partial outage)Oct 21, 2026: 99.35% uptime, 1 incident (Degraded performance)Oct 22, 2026: 94.61% uptime, 2 incidents (Degraded performance)Oct 23, 2026: 99.47% uptime, 3 incidents (Degraded performance)Oct 24, 2026 – Oct 29, 2026: no incidentsOct 30, 2026: 99.00% uptime, 1 incident (Degraded performance)Oct 31, 2026 – Nov 2, 2026: no incidents
90 days ago96.890% average daily uptimeToday

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

Recent ChatGPT incidents

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Recent Claude incidents

Full Claude reliability report →

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