ChatGPT API disruption on 5 October 2026

ChatGPT API from Amsterdam, Mumbai, San Francisco, Singapore, Tokyo, Montreal: degraded checks; 2026-10-05 19:30 UTC to 2026-10-05 21:30 UTC: peak first visible token 3.22 s vs a usual 1.2 s.

What our checks saw: Degraded
Cities affected: Amsterdam, Mumbai, San Francisco, Singapore, Tokyo, Montreal
When: 5 Oct, 19:30 UTC to 5 Oct, 21:30 UTC
How long: 2 hours
Slowest check: 3.22 s, usually 1.20 s
OpenAI'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 (1.18 s)Much slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
16:30	1.51 s	Normal
17:00	1.27 s	Normal
17:30	1.27 s	Normal
18:00	1.38 s	Normal
18:30	1.76 s	Normal
19:00	1.78 s	Slower than usual
19:30	3.35 s	Much slower, or failing
20:00	1.58 s	Normal
20:30	1.36 s	Normal
21:00	1.36 s	Normal
21:30	1.29 s	Normal
22:00	1.30 s	Normal
22:30	1.43 s	Normal
23:00	1.12 s	Normal
23:30	1.09 s	Normal
00:00	1.39 s	Normal
00:30	1.50 s	Normal

San Francisco

Each check (UTC)Usual (1.10 s)Much slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
16:30	1.56 s	Normal
17:00	1.06 s	Normal
17:30	1.08 s	Normal
18:00	1.08 s	Normal
18:30	1.63 s	Normal
19:00	1.95 s	Slower than usual
19:30	4.03 s	Much slower, or failing
20:00	1.63 s	Normal
20:30	1.45 s	Normal
21:00	1.24 s	Normal
21:30	849 ms	Normal
22:00	1.03 s	Normal
22:30	888 ms	Normal
23:00	1.51 s	Normal
23:30	896 ms	Normal
00:00	1.06 s	Normal
00:30	1.85 s	Slower than usual

Montreal

Each check (UTC)Usual (1.13 s)Much slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
16:30	1.03 s	Normal
17:00	903 ms	Normal
17:30	776 ms	Normal
18:00	1.97 s	Slower than usual
18:30	1.42 s	Normal
19:00	1.50 s	Normal
19:30	3.97 s	Much slower, or failing
20:00	1.14 s	Normal
20:30	1.35 s	Normal
21:00	957 ms	Normal
21:30	1.11 s	Normal
22:00	1.49 s	Normal
22:30	843 ms	Normal
23:00	1.45 s	Normal
23:30	1.16 s	Normal
00:00	1.54 s	Normal
00:30	2.65 s	Slower than usual

Singapore

Each check (UTC)Usual (1.20 s)Slower than usualMuch slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
16:30	1.71 s	Normal
17:00	1.60 s	Normal
17:30	1.35 s	Normal
18:00	1.68 s	Normal
18:30	1.78 s	Normal
19:00	1.47 s	Normal
19:30	4.46 s	Much slower, or failing
20:00	1.16 s	Normal
20:30	2.09 s	Slower than usual
21:00	1.17 s	Normal
21:30	1.11 s	Normal
22:00	1.12 s	Normal
22:30	1.94 s	Slower than usual
23:00	1.16 s	Normal
23:30	1.03 s	Normal
00:00	1.49 s	Normal
00:30	1.21 s	Normal

Tokyo

Each check (UTC)Usual (1.20 s)Much slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
16:30	1.48 s	Normal
17:00	1.94 s	Slower than usual
17:30	1.50 s	Normal
18:00	1.59 s	Normal
18:30	1.39 s	Normal
19:00	2.04 s	Slower than usual
19:30	4.41 s	Much slower, or failing
20:00	1.32 s	Normal
20:30	1.22 s	Normal
21:00	1.62 s	Normal
21:30	1.06 s	Normal
22:00	1.28 s	Normal
22:30	1.15 s	Normal
23:00	1.56 s	Normal
23:30	1.16 s	Normal
00:00	1.89 s	Slower than usual
00:30	995 ms	Normal

Mumbai

Each check (UTC)Usual (1.56 s)Slower than usualSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
16:30	1.53 s	Normal
17:00	1.67 s	Normal
17:30	1.39 s	Normal
18:00	1.99 s	Normal
18:30	1.20 s	Normal
19:00	2.33 s	Normal
19:30	3.79 s	Slower than usual
20:00	1.55 s	Normal
20:30	2.41 s	Slower than usual
21:00	2.07 s	Normal
21:30	1.54 s	Normal
22:00	1.52 s	Normal
22:30	1.97 s	Normal
23:00	2.42 s	Slower than usual
23:30	1.86 s	Normal
00:00	2.05 s	Normal
00:30	1.53 s	Normal

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