Service comparison

ChatGPT vs. Claude

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

Last 90 days · 135 incidents total · Data via Pulsetic monitoring

Head-to-head

90-day summary

ChatGPT

chatgpt.com

Online
- 90-day uptime
  
  87.15%
- Incidents (90d)
  
  43
  
  5 major · 38 minor
- Median resolution
  
  1h 39m
- Longest outage
  
  139h
View status page →
Claude

claude.ai

Online
- 90-day uptime
  
  94.91%
- Incidents (90d)
  
  92
  
  31 major · 61 minor
- Median resolution
  
  45m
- Longest outage
  
  18h 3m
View status page →

Uptime over time

Availability across windows

Window	ChatGPT	Claude	Δ
Last 24 hours	95.00%	73.47%	+21.53 pp
Last 7 days	78.24%	90.94%	-12.70 pp
Last 30 days	76.60%	90.54%	-13.94 pp
Last 90 days	87.15%	94.91%	-7.76 pp

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

Incidents 90-day

Severity breakdown

ChatGPT

43 total

5 major 38 minor
- Median resolution
  
  1h 39m
- Longest outage
  
  139h
Claude

92 total

31 major 61 minor
- Median resolution
  
  45m
- Longest outage
  
  18h 3m

Recent activity

Last 5 incidents, side-by-side

ChatGPT
- Jun 2
  
  Guest users are experiencing elevated error rate when using ChatGPT conversations.
  
  1h 12m
  
  Minor
- Jun 1
  
  Decreased ChatGPT availability for Free users
  
  1h 2m
  
  Major
- May 29
  
  Users May Experience Issues Accessing ChatGPT
  
  8m
  
  Minor
- May 29
  
  Users may encounter issues with conversations
  
  1h 39m
  
  Minor
- May 29
  
  Users may encounter issues logging in or creating an account
  
  1h 44m
  
  Minor
View all incidents →
Claude
- Jun 2
  
  Elevated errors on multiple models
  
  5h 44m
  
  Major
- Jun 1
  
  Degraded performance for Claude Sonnet 4.6
  
  38m
  
  Minor
- Jun 1
  
  Elevated errors on Claude Sonnet 4.6
  
  1h
  
  Minor
- Jun 1
  
  Elevated errors for Claude Opus 4.7
  
  1h 18m
  
  Minor
- Jun 1
  
  Sonnet 4.5 elevated errors
  
  19m
  
  Minor
View all incidents →

Bottom line

Claude wins

Claude edges out on 90-day uptime.

ChatGPT posted 87.15% vs. 94.91% for Claude (Δ -7.76 pp). Incidents: 43 vs. 92 (-49).

Also compare

Other ChatGPT comparisons

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