Service comparison

ChatGPT vs. Claude

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

Last 90 days · 195 incidents total · Data via Pulsetic monitoring

Head-to-head

90-day summary

ChatGPT

chatgpt.com

Ongoing incident
- 90-day uptime
  
  71.61%
- Incidents (90d)
  
  90
  
  12 major · 78 minor
- Median resolution
  
  1h 54m
- Longest outage
  
  238h 32m
View status page →
Claude

claude.ai

Major outage
- 90-day uptime
  
  86.01%
- Incidents (90d)
  
  105
  
  33 major · 72 minor
- Median resolution
  
  1h 1m
- Longest outage
  
  99h 20m
View status page →

Uptime over time

Availability across windows

Window	ChatGPT	Claude	Δ
Last 24 hours	93.75%	97.78%	-4.03 pp
Last 7 days	74.42%	39.70%	+34.72 pp
Last 30 days	86.54%	83.12%	+3.42 pp
Last 90 days	71.61%	86.01%	-14.40 pp

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

Incidents 90-day

Severity breakdown

ChatGPT

90 total

12 major 78 minor
- Median resolution
  
  1h 54m
- Longest outage
  
  238h 32m
Claude

105 total

33 major 72 minor
- Median resolution
  
  1h 1m
- Longest outage
  
  99h 20m

Recent activity

Last 5 incidents, side-by-side

ChatGPT
- Sep 16
  
  Elevated errors in ChatGPT Work
  
  50m
  
  Minor
- Sep 15
  
  Elevated errors with gpt-image-2.5-flare
  
  40m
  
  Major
- Sep 15
  
  Ads Manager login issues
  
  1m
  
  Minor
- Sep 15
  
  Elevated errors from GPT-5.6 and GPT-5.6 Instant on paid plans
  
  41m
  
  Minor
- Sep 14
  
  Degraded Performance affecting Agents API
  
  18m
  
  Minor
View all incidents →
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 →

Bottom line

Claude wins

Claude edges out on 90-day uptime.

ChatGPT posted 71.61% vs. 86.01% for Claude (Δ -14.40 pp). Incidents: 90 vs. 105 (-15).

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