Service comparison

Claude vs. ChatGPT

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

Last 90 days · 183 incidents total · Data via Pulsetic monitoring

Head-to-head

90-day summary

Claude

claude.ai

Major outage
- 90-day uptime
  
  93.27%
- Incidents (90d)
  
  120
  
  38 major · 82 minor
- Median resolution
  
  50m
- Longest outage
  
  18h 3m
View status page →
ChatGPT

chatgpt.com

Ongoing incident
- 90-day uptime
  
  85.83%
- Incidents (90d)
  
  63
  
  7 major · 56 minor
- Median resolution
  
  1h 26m
- Longest outage
  
  139h
View status page →

Uptime over time

Availability across windows

Window	Claude	ChatGPT	Δ
Last 24 hours	89.51%	93.75%	-4.24 pp
Last 7 days	91.86%	92.56%	-0.70 pp
Last 30 days	90.91%	87.67%	+3.24 pp
Last 90 days	93.27%	85.83%	+7.44 pp

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

Incidents 90-day

Severity breakdown

Claude

120 total

38 major 82 minor
- Median resolution
  
  50m
- Longest outage
  
  18h 3m
ChatGPT

63 total

7 major 56 minor
- Median resolution
  
  1h 26m
- Longest outage
  
  139h

Recent activity

Last 5 incidents, side-by-side

Claude
- Jun 18
  
  Service disruption on Claude services
  
  Ongoing
  
  Major
- Jun 17
  
  Elevated errors for Claude Opus 4.8
  
  53m
  
  Minor
- Jun 17
  
  Elevated errors for Claude Opus 4.8
  
  1h 38m
  
  Minor
- Jun 17
  
  Elevated errors for Claude Opus 4.8
  
  1h 29m
  
  Minor
- Jun 17
  
  Elevated errors on Claude Sonnet 4.6 and Opus 4.8
  
  2h 3m
  
  Minor
View all incidents →
ChatGPT
- 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
- Jun 16
  
  Users may experience issue with Codex Cloud tasks
  
  48m
  
  Minor
- Jun 15
  
  FedRAMP workspaces and API orgs have degraded performance
  
  Ongoing
  
  Minor
View all incidents →

Bottom line

Claude wins

Claude edges out on 90-day uptime.

Claude posted 93.27% vs. 85.83% for ChatGPT (Δ +7.44 pp). Incidents: 120 vs. 63 (+57).

Also compare

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