Service comparison

ChatGPT vs. Claude

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

Last 90 days · 182 incidents total · Data via Pulsetic monitoring

Head-to-head

90-day summary

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 →
Claude

claude.ai

Major outage
- 90-day uptime
  
  93.27%
- Incidents (90d)
  
  119
  
  37 major · 82 minor
- Median resolution
  
  50m
- Longest outage
  
  18h 3m
View status page →

Uptime over time

Availability across windows

Window	ChatGPT	Claude	Δ
Last 24 hours	93.75%	89.51%	+4.24 pp
Last 7 days	92.56%	91.86%	+0.70 pp
Last 30 days	87.67%	90.86%	-3.19 pp
Last 90 days	85.83%	93.27%	-7.44 pp

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

Incidents 90-day

Severity breakdown

ChatGPT

63 total

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

119 total

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

Recent activity

Last 5 incidents, side-by-side

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 →
Claude
- 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
- Jun 16
  
  Elevated errors for Claude Opus 4.8
  
  1h 12m
  
  Major
View all incidents →

Bottom line

Claude wins

Claude edges out on 90-day uptime.

ChatGPT posted 85.83% vs. 93.27% for Claude (Δ -7.44 pp). Incidents: 63 vs. 119 (-56).

Also compare

Other ChatGPT comparisons

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