Claude API disruption on 29 September 2026

Claude API from Amsterdam, Mumbai, San Francisco, Singapore, Tokyo, Montreal: degraded checks; 2026-09-29 13:30 UTC to 2026-09-29 19:30 UTC: peak first visible token 2.31 s vs a usual 1.5 s.

What our checks saw: Degraded
Cities affected: Amsterdam, Mumbai, San Francisco, Singapore, Tokyo, Montreal
When: 29 Sept, 13:30 UTC to 29 Sept, 19:30 UTC
How long: 6 hours
Slowest check: 2.31 s, usually 1.50 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 (1.50 s)Slower than usualMuch slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
10:30	1.67 s	Normal
11:00	1.72 s	Normal
11:30	2.24 s	Slower than usual
12:00	1.63 s	Normal
12:30	1.81 s	Normal
13:00	1.86 s	Normal
13:30	1.70 s	Normal
14:00	1.91 s	Normal
14:30	–	Much slower, or failing
15:00	1.86 s	Normal
15:30	1.74 s	Normal
16:00	2.81 s	Slower than usual
16:30	1.80 s	Normal
17:00	1.79 s	Normal
17:30	1.86 s	No check
18:00	2.04 s	Normal
18:30	1.75 s	Normal
19:00	1.71 s	Normal
19:30	1.75 s	Normal
20:00	1.72 s	Normal
20:30	1.55 s	Normal
21:00	1.62 s	Normal
21:30	1.29 s	Normal
22:00	1.45 s	Normal

San Francisco

Each check (UTC)Usual (1.36 s)Slower than usualMuch slower, or failingIncident

Every check as a table

Time (UTC)	Check	Reading
10:30	1.61 s	Normal
11:00	1.63 s	Normal
11:30	1.66 s	Normal
12:00	1.52 s	Normal
12:30	1.69 s	Normal
13:00	1.61 s	Normal
13:30	1.79 s	Normal
14:00	1.74 s	Normal
14:30	–	Much slower, or failing
15:00	1.72 s	Normal
15:30	1.75 s	Normal
16:00	2.53 s	Slower than usual
16:30	1.76 s	Normal
17:00	1.84 s	Normal
17:30	1.70 s	No check
18:00	1.85 s	Normal
18:30	1.65 s	Normal
19:00	1.53 s	Normal
19:30	1.58 s	Normal
20:00	1.45 s	Normal
20:30	1.47 s	Normal
21:00	1.68 s	Normal
21:30	1.11 s	Normal
22:00	1.32 s	Normal

Montreal

Each check (UTC)Usual (1.36 s)Slower than usualMuch slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
10:30	1.85 s	Normal
11:00	1.77 s	Normal
11:30	2.00 s	Normal
12:00	1.48 s	Normal
12:30	1.69 s	Normal
13:00	1.81 s	Normal
13:30	2.03 s	Slower than usual
14:00	1.77 s	Normal
14:30	–	Much slower, or failing
15:00	1.61 s	Normal
15:30	1.74 s	Normal
16:00	2.59 s	Slower than usual
16:30	1.89 s	Normal
17:00	1.62 s	Normal
17:30	1.59 s	No check
18:00	2.13 s	Slower than usual
18:30	1.73 s	Normal
19:00	1.64 s	Normal
19:30	1.70 s	Normal
20:00	2.26 s	Slower than usual
20:30	1.42 s	Normal
21:00	1.30 s	Normal
21:30	1.43 s	Normal
22:00	1.32 s	Normal

Singapore

Each check (UTC)Usual (1.52 s)Slower than usualMuch slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
10:30	2.02 s	Normal
11:00	1.73 s	Normal
11:30	1.85 s	Normal
12:00	2.39 s	Slower than usual
12:30	1.85 s	Normal
13:00	1.81 s	Normal
13:30	1.86 s	Normal
14:00	1.86 s	Normal
14:30	–	Much slower, or failing
15:00	1.92 s	Normal
15:30	1.97 s	Normal
16:00	2.37 s	Slower than usual
16:30	1.84 s	Normal
17:00	1.98 s	Normal
17:30	1.91 s	No check
18:00	1.90 s	Normal
18:30	1.86 s	Normal
19:00	1.74 s	Normal
19:30	1.78 s	Normal
20:00	1.74 s	Normal
20:30	1.52 s	Normal
21:00	1.59 s	Normal
21:30	1.37 s	Normal
22:00	1.46 s	Normal

Tokyo

Each check (UTC)Usual (1.43 s)Slower than usualMuch slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
10:30	1.71 s	Normal
11:00	1.77 s	Normal
11:30	1.83 s	Normal
12:00	1.59 s	Normal
12:30	1.74 s	Normal
13:00	1.81 s	Normal
13:30	1.86 s	Normal
14:00	1.81 s	Normal
14:30	–	Much slower, or failing
15:00	1.83 s	Normal
15:30	1.86 s	Normal
16:00	2.68 s	Slower than usual
16:30	1.80 s	Normal
17:00	1.72 s	Normal
17:30	1.71 s	No check
18:00	1.71 s	Normal
18:30	1.70 s	Normal
19:00	1.74 s	Normal
19:30	1.66 s	Normal
20:00	1.91 s	Normal
20:30	1.60 s	Normal
21:00	1.65 s	Normal
21:30	3.62 s	Much slower, or failing
22:00	1.47 s	Normal

Mumbai

Each check (UTC)Usual (1.51 s)Slower than usualMuch slower, or failingIncident

Every check as a table

Time (UTC)	Check	Reading
10:30	1.88 s	Normal
11:00	1.86 s	Normal
11:30	1.89 s	Normal
12:00	1.79 s	Normal
12:30	1.83 s	Normal
13:00	1.91 s	Normal
13:30	1.99 s	Normal
14:00	1.87 s	Normal
14:30	–	Much slower, or failing
15:00	1.94 s	Normal
15:30	1.93 s	Normal
16:00	2.33 s	Slower than usual
16:30	1.79 s	Normal
17:00	1.86 s	Normal
17:30	1.93 s	No check
18:00	1.81 s	Normal
18:30	1.88 s	Normal
19:00	1.80 s	Normal
19:30	1.97 s	Normal
20:00	1.80 s	Normal
20:30	1.82 s	Normal
21:00	2.25 s	Normal
21:30	1.46 s	Normal
22:00	1.57 s	Normal

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