Service comparison

ChatGPT vs. Claude

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

Last 90 days · 200 incidents total · Data via Pulsetic monitoring

Head-to-head

90-day summary

ChatGPT

chatgpt.com

Ongoing incident
- 90-day uptime
  
  61.61%
- Incidents (90d)
  
  88
  
  12 major · 76 minor
- Median resolution
  
  2h 7m
- Longest outage
  
  264h 55m
View status page →
Claude

claude.ai

Major outage
- 90-day uptime
  
  90.02%
- Incidents (90d)
  
  112
  
  34 major · 78 minor
- Median resolution
  
  1h 2m
- Longest outage
  
  45h 40m
View status page →

Uptime over time

Availability across windows

Window	ChatGPT	Claude	Δ
Last 24 hours	80.63%	91.88%	-11.25 pp
Last 7 days	84.23%	98.84%	-14.61 pp
Last 30 days	88.69%	95.70%	-7.01 pp
Last 90 days	61.61%	90.02%	-28.41 pp

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

Incidents 90-day

Severity breakdown

ChatGPT

88 total

12 major 76 minor
- Median resolution
  
  2h 7m
- Longest outage
  
  264h 55m
Claude

112 total

34 major 78 minor
- Median resolution
  
  1h 2m
- Longest outage
  
  45h 40m

Recent activity

Last 5 incidents, side-by-side

ChatGPT
- Sep 11
  
  1% of ChatGPT Work (mobile/web) turns are failing for existing threads
  
  Ongoing
  
  Minor
- Sep 11
  
  Elevated errors for GPT-5.6 Sol on the API
  
  2h 13m
  
  Minor
- Sep 11
  
  Elevated errors for ChatGPT users in Europe
  
  2h 23m
  
  Minor
- Sep 10
  
  Delays in customer support responses
  
  1h 55m
  
  Minor
- Sep 10
  
  Elevated errors affecting ChatGPT Work
  
  1h 40m
  
  Minor
View all incidents →
Claude
- 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
  
  Ongoing
  
  Major
- Sep 3
  
  Elevated errors for multiple models
  
  2h 57m
  
  Major
- Sep 3
  
  Elevated errors for Claude Sonnet 5
  
  18m
  
  Major
View all incidents →

Bottom line

Claude wins

Claude edges out on 90-day uptime.

ChatGPT posted 61.61% vs. 90.02% for Claude (Δ -28.41 pp). Incidents: 88 vs. 112 (-24).

Also compare

Other ChatGPT comparisons

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