AI Chat Assistants · reliability comparison

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

Perplexity is more reliable than ChatGPT, scoring 84.0 vs 32.2 out of 100. Over the last 90 days ChatGPT reported 84 incidents and Perplexity reported 8, with effective uptime of 96.84% and 99.83% respectively. Perplexity resolves incidents faster on average (1h 19m).

Data updated Nov 1, 2026 · How we score

ChatGPT

32.2/100

Operational

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Perplexity

84.0/100

Operational

Visit Perplexity ↗
VS
MetricChatGPTPerplexity
Reliability score32.284.0
Rank (AI chat assistants)#7#2
Uptime (90 days)96.84%99.83%
Incidents (90 days)848
Partial / major outages93
Avg time to resolve6h 19m1h 19m
Outages we detected00
Transparency score100/100100/100

Where ChatGPT and Perplexity differ

  • ChatGPT reported 10.5× as many incidents as Perplexity over the last 90 days (84 vs 8).
  • ChatGPT had 9 partial or major outages, compared with 3 for Perplexity.
  • Perplexity fixes problems faster: 1h 19m on average, against 6h 19m for ChatGPT (4.8× quicker).
  • ChatGPT's longest outage on record lasted 9h 54m (Oct 7, 2026); Perplexity's lasted 4h 31m (Jun 4, 2026).

90-day uptime

ChatGPT

Aug 4, 2026: 98.31% uptime, 1 incident (Degraded performance)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 1, 2026: no incidents
90 days ago96.871% average daily uptimeToday

Perplexity

Aug 4, 2026 – Aug 5, 2026: no incidentsAug 6, 2026: 97.78% uptime, 1 incident (Degraded performance)Aug 7, 2026 – Aug 10, 2026: no incidentsAug 11, 2026: 99.94% uptime, 1 incident (Degraded performance)Aug 12, 2026: no incidentsAug 13, 2026: 95.53% uptime, 1 incident (Major outage)Aug 14, 2026: 99.40% uptime, 1 incident (Degraded performance)Aug 15, 2026 – Sep 2, 2026: no incidentsSep 3, 2026: 97.25% uptime, 1 incident (Major outage)Sep 4, 2026: no incidentsSep 5, 2026: 95.17% uptime, 1 incident (Partial outage)Sep 6, 2026 – Oct 8, 2026: no incidentsOct 9, 2026: 99.61% uptime, 1 incident (Degraded performance)Oct 10, 2026 – Nov 1, 2026: no incidents
90 days ago99.830% average daily uptimeToday

Recent ChatGPT incidents

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Recent Perplexity incidents

Full Perplexity reliability report →

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