Service comparison

Claude vs. ChatGPT

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

Last 90 days · 193 incidents total · Data via Pulsetic monitoring

Head-to-head

90-day summary

Claude

claude.ai

Online
- 90-day uptime
  
  86.52%
- Incidents (90d)
  
  99
  
  32 major · 67 minor
- Median resolution
  
  1h 1m
- Longest outage
  
  99h 20m
View status page →
ChatGPT

chatgpt.com

Online
- 90-day uptime
  
  71.13%
- Incidents (90d)
  
  94
  
  13 major · 81 minor
- Median resolution
  
  1h 52m
- Longest outage
  
  238h 32m
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	86.23%	84.22%	+2.01 pp
Last 30 days	83.80%	85.88%	-2.08 pp
Last 90 days	86.52%	71.13%	+15.39 pp

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

Incidents 90-day

Severity breakdown

Claude

99 total

32 major 67 minor
- Median resolution
  
  1h 1m
- Longest outage
  
  99h 20m
ChatGPT

94 total

13 major 81 minor
- Median resolution
  
  1h 52m
- Longest outage
  
  238h 32m

Recent activity

Last 5 incidents, side-by-side

Claude
- Sep 16
  
  Issues with Google Play subscriptions
  
  32m
  
  Minor
- Sep 15
  
  Intermittent error spikes for Claude Mythos 5.1 and Claude Fable 5.1
  
  1h 26m
  
  Major
- Sep 11
  
  Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1
  
  17m
  
  Major
- Sep 10
  
  Elevated latency on the Claude API for some users
  
  1h 40m
  
  Minor
- Sep 10
  
  Degraded functionality for Claude Cowork on Windows
  
  4d 3h 20m
  
  Major
View all incidents →
ChatGPT
- Sep 18
  
  SSO sign-in and SCIM provisioning issues
  
  18m
  
  Minor
- Sep 18
  
  Overbilling for OpenAI-hosted containers in the Agent API
  
  9h 22m
  
  Minor
- Sep 18
  
  Delayed support responses
  
  3h 33m
  
  Minor
- Sep 17
  
  We are seeing elevated error rates across API models
  
  21m
  
  Minor
- Sep 17
  
  Elevated errors affecting ChatGPT Work mode
  
  1h 21m
  
  Major
View all incidents →

Bottom line

Claude wins

Claude edges out on 90-day uptime.

Claude posted 86.52% vs. 71.13% for ChatGPT (Δ +15.39 pp). Incidents: 99 vs. 94 (+5).

Also compare

Other Claude comparisons

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