Claude API disruption on 5 October 2026

Claude API from Amsterdam, Mumbai, San Francisco, Singapore, Tokyo, Montreal: degraded checks; 2026-10-05 02:00 UTC to 2026-10-05 05:30 UTC: peak first visible token 3.45 s vs a usual 1.22 s.

What our checks saw: Degraded
Cities affected: Amsterdam, Mumbai, San Francisco, Singapore, Tokyo, Montreal
When: 5 Oct, 02:00 UTC to 5 Oct, 05:30 UTC
How long: 3.5 hours
Slowest check: 3.45 s, usually 1.22 s
Anthropic's status page: Open it

Where our checks saw it

Each glowing city had slow or failing checks during the incident, shown at its worst. We test from 6 cities, so other places may have been hit too.

Our checks, city by city

Each point is one check every 30 minutes, from three hours before the incident to three hours after. Coloured points are the checks we counted as slower or failing. The shaded area shows how far above the usual time they were.

Amsterdam

Each check (UTC)Usual (1.30 s)Much slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
23:00	1.33 s	Normal
23:30	1.11 s	Normal
00:00	1.32 s	Normal
00:30	1.24 s	Normal
01:00	1.20 s	Normal
01:30	1.58 s	Normal
02:00	5.19 s	Much slower, or failing
02:30	1.31 s	Normal
03:00	918 ms	Normal
03:30	965 ms	Normal
04:00	1.09 s	Normal
04:30	902 ms	Normal
05:00	908 ms	Normal
05:30	922 ms	Normal
06:00	2.05 s	Slower than usual
06:30	1.09 s	Normal
07:00	1.25 s	Normal
07:30	1.34 s	Normal
08:00	1.19 s	Normal
08:30	887 ms	Normal

San Francisco

Each check (UTC)Usual (1.15 s)Much slower, or failingIncident

Every check as a table

Time (UTC)	Check	Reading
23:00	1.29 s	Normal
23:30	1.05 s	Normal
00:00	1.28 s	Normal
00:30	1.08 s	Normal
01:00	1.16 s	Normal
01:30	1.29 s	Normal
02:00	4.60 s	Much slower, or failing
02:30	1.33 s	Normal
03:00	814 ms	Normal
03:30	–	No check
04:00	995 ms	No check
04:30	932 ms	Normal
05:00	1.29 s	Normal
05:30	870 ms	Normal
06:00	874 ms	Normal
06:30	909 ms	Normal
07:00	929 ms	Normal
07:30	924 ms	Normal
08:00	1.28 s	Normal
08:30	842 ms	Normal

Montreal

Each check (UTC)Usual (1.16 s)Much slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
23:00	1.33 s	Normal
23:30	1.02 s	Normal
00:00	1.20 s	Normal
00:30	1.18 s	Normal
01:00	1.23 s	Normal
01:30	1.41 s	Normal
02:00	4.51 s	Much slower, or failing
02:30	1.30 s	Normal
03:00	990 ms	Normal
03:30	1.18 s	Normal
04:00	917 ms	Normal
04:30	895 ms	Normal
05:00	787 ms	Normal
05:30	1.09 s	Normal
06:00	810 ms	Normal
06:30	876 ms	Normal
07:00	9.74 s	Much slower, or failing
07:30	880 ms	Normal
08:00	880 ms	Normal
08:30	849 ms	Normal

Singapore

Each check (UTC)Usual (1.32 s)Slower than usualMuch slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
23:00	1.47 s	Normal
23:30	1.21 s	Normal
00:00	1.44 s	Normal
00:30	1.28 s	Normal
01:00	1.33 s	Normal
01:30	1.49 s	Normal
02:00	4.96 s	Much slower, or failing
02:30	1.43 s	Normal
03:00	2.01 s	Slower than usual
03:30	1.01 s	Normal
04:00	1.00 s	Normal
04:30	1.01 s	Normal
05:00	1.44 s	Normal
05:30	1.02 s	Normal
06:00	999 ms	Normal
06:30	1.05 s	Normal
07:00	2.19 s	Slower than usual
07:30	1.07 s	Normal
08:00	1.11 s	Normal
08:30	2.02 s	Slower than usual

Tokyo

Each check (UTC)Usual (1.21 s)Slower than usualMuch slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
23:00	1.38 s	Normal
23:30	1.13 s	Normal
00:00	1.26 s	Normal
00:30	1.12 s	Normal
01:00	1.30 s	Normal
01:30	1.36 s	Normal
02:00	4.98 s	Much slower, or failing
02:30	1.91 s	Slower than usual
03:00	915 ms	Normal
03:30	1.29 s	Normal
04:00	974 ms	Normal
04:30	940 ms	Normal
05:00	907 ms	Normal
05:30	1.02 s	Normal
06:00	2.05 s	Slower than usual
06:30	2.10 s	Slower than usual
07:00	970 ms	Normal
07:30	988 ms	Normal
08:00	1.01 s	Normal
08:30	978 ms	Normal

Mumbai

Each check (UTC)Usual (1.34 s)Much slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
23:00	1.55 s	Normal
23:30	1.25 s	Normal
00:00	1.42 s	Normal
00:30	1.31 s	Normal
01:00	1.35 s	Normal
01:30	1.54 s	Normal
02:00	4.69 s	Much slower, or failing
02:30	1.62 s	Normal
03:00	1.04 s	Normal
03:30	1.09 s	Normal
04:00	1.23 s	Normal
04:30	1.39 s	Normal
05:00	1.03 s	Normal
05:30	1.05 s	Normal
06:00	1.07 s	Normal
06:30	2.21 s	Slower than usual
07:00	1.13 s	Normal
07:30	1.06 s	Normal
08:00	1.06 s	Normal
08:30	1.07 s	Normal

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