Service comparison

Claude vs. ChatGPT

Claude vs. ChatGPT — reliability, API availability, and incident frequency head-to-head.

Last 90 days · 225 incidents total · Data via Pulsetic monitoring

Head-to-head

90-day summary

Claude

claude.ai

Major outage
- 90-day uptime
  
  69.67%
- Incidents (90d)
  
  129
  
  37 major · 92 minor
- Median resolution
  
  59m
- Longest outage
  
  450h 35m
View status page →
ChatGPT

chatgpt.com

Ongoing incident
- 90-day uptime
  
  61.80%
- Incidents (90d)
  
  96
  
  12 major · 84 minor
- Median resolution
  
  1h 47m
- Longest outage
  
  264h 55m
View status page →

Uptime over time

Availability across windows

Window	Claude	ChatGPT	Δ
Last 24 hours	100.00%	100.00%	0.00 pp
Last 7 days	96.17%	94.98%	+1.19 pp
Last 30 days	93.86%	86.59%	+7.27 pp
Last 90 days	69.67%	61.80%	+7.87 pp

Δ is percentage-point difference (Claude minus ChatGPT). Higher is better.

Incidents 90-day

Severity breakdown

Claude

129 total

37 major 92 minor
- Median resolution
  
  59m
- Longest outage
  
  450h 35m
ChatGPT

96 total

12 major 84 minor
- Median resolution
  
  1h 47m
- Longest outage
  
  264h 55m

Recent activity

Last 5 incidents, side-by-side

Claude
- Aug 20
  
  Elevated errors on requests to multiple models
  
  26m
  
  Major
- Aug 20
  
  Elevated errors on Google connectors
  
  28m
  
  Minor
- Aug 19
  
  Degraded performance for Claude Opus 5 and Claude Haiku 4.5
  
  1h 19m
  
  Minor
- Aug 18
  
  Degraded performance for multiple models
  
  2h 41m
  
  Minor
- Aug 17
  
  Degraded performance for Claude Opus 5, Claude Sonnet 5
  
  1h 32m
  
  Minor
View all incidents →
ChatGPT
- Aug 21
  
  Unexpected logouts for some ChatGPT web users
  
  3h 26m
  
  Minor
- Aug 20
  
  Elevated Codex API authentication errors
  
  53m
  
  Minor
- Aug 20
  
  Elevated Errors for Thinking mode in ChatGPT
  
  2h 55m
  
  Minor
- Aug 20
  
  Chatgpt.com is down - all signups and logins are down as of right now
  
  52m
  
  Minor
- Aug 18
  
  Elevated errors deploying Sites
  
  20m
  
  Minor
View all incidents →

Bottom line

Claude wins

Claude edges out on 90-day uptime.

Claude posted 69.67% vs. 61.80% for ChatGPT (Δ +7.87 pp). Incidents: 129 vs. 96 (+33).

Also compare

Other Claude comparisons

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