Service comparison

ChatGPT vs. Claude

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

Last 90 days · 191 incidents total · Data via Pulsetic monitoring

Head-to-head

90-day summary

ChatGPT

chatgpt.com

Ongoing incident
- 90-day uptime
  
  85.61%
- Incidents (90d)
  
  65
  
  7 major · 58 minor
- Median resolution
  
  1h 29m
- Longest outage
  
  139h
View status page →
Claude

claude.ai

Major outage
- 90-day uptime
  
  92.73%
- Incidents (90d)
  
  126
  
  39 major · 87 minor
- Median resolution
  
  50m
- Longest outage
  
  18h 3m
View status page →

Uptime over time

Availability across windows

Window	ChatGPT	Claude	Δ
Last 24 hours	100.00%	64.44%	+35.56 pp
Last 7 days	93.89%	87.37%	+6.52 pp
Last 30 days	90.10%	90.84%	-0.74 pp
Last 90 days	85.61%	92.73%	-7.12 pp

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

Incidents 90-day

Severity breakdown

ChatGPT

65 total

7 major 58 minor
- Median resolution
  
  1h 29m
- Longest outage
  
  139h
Claude

126 total

39 major 87 minor
- Median resolution
  
  50m
- Longest outage
  
  18h 3m

Recent activity

Last 5 incidents, side-by-side

ChatGPT
- Jun 19
  
  chatgpt.com access issues
  
  1h 43m
  
  Minor
- Jun 18
  
  SSO login errors for some ChatGPT Enterprise workspaces
  
  2h 59m
  
  Minor
- Jun 18
  
  ChatGPT failing to load or save
  
  28m
  
  Minor
- Jun 17
  
  Errors with conversations on Android and iOS devices
  
  1h 2m
  
  Major
- Jun 16
  
  Codex "Selected Model is at Capacity" Error
  
  3h 16m
  
  Minor
View all incidents →
Claude
- Jun 22
  
  Elevated errors across many models
  
  31m
  
  Minor
- Jun 22
  
  Elevated errors for Claude Opus 4.8
  
  6h 32m
  
  Minor
- Jun 22
  
  Elevated Error Rates for Opus 4.8, Opus 4.7, Opus 4.6, Sonnet 4.6, and Haiku 4.5
  
  1h 29m
  
  Major
- Jun 20
  
  Opus 4.8 errors
  
  55m
  
  Minor
- Jun 19
  
  Elevated error rates on the Claude API
  
  27m
  
  Minor
View all incidents →

Bottom line

Claude wins

Claude edges out on 90-day uptime.

ChatGPT posted 85.61% vs. 92.73% for Claude (Δ -7.12 pp). Incidents: 65 vs. 126 (-61).

Also compare

Other ChatGPT comparisons

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