As of September 06, 2026, the ai21 AI API responds in 175 ms p50 (edge, time-to-first-byte) from US (Central) — its fastest measured region — with 100% uptime. Slowest is Europe (Germany) at 397 ms p50.
Is ai21 down right now?
Reachable from all 4 regions
Last successful probe Sep 6, 17:15 UTC · every 5 minutes from 4 region(s) · status feed checked Sep 6, 17:17 UTC
Every probe from every region reached the ai21 API successfully in the last 72 hours. Measured from outside ai21’s own network, independently of its status page; full log: measured AI API incidents.
Real requests: not measured for ai21 — only the API host is probed here, so errors limited to specific models are invisible to these probes. That is exactly what a status page tends to report, hence the line below.
ai21’s status page lists no open incident (checked Sep 6, 17:17 UTC).
Edge latency, 24 h
175 ms
p50 from US (Central), the fastest region
Uptime, 24 h
100%
1,151 probes across 4 region(s)
Failed probes, 72 h
0
of 3,454 probes, all regions
Reported by ai21, 72 h
0
on status.ai21.com
Was ai21 down in the last 3 days?
No. All 3,454 probes from 4 region(s) reached the ai21 API in the last 72 hours.
What ai21’s own status page reported
Nothing. ai21’s status page lists no incident in the last 72 hours (checked Sep 6, 17:17 UTC).
Is ai21 getting faster or slower?
hourly p50 latencyall probes succeededsome probes failedhalf or more failedno data
One panel per region: the line is the hourly p50 edge latency (shared scale, ms), the strip beneath it is the outcome of that hour’s host probes. Hover any hour for the numbers. Flat is good; a rising line means the endpoint is slowing down from that origin, a gap means no probe succeeded in that hour.
How fast is the ai21 API from each region?
Region
p50 TTFB
p95
Uptime
Asia (Tokyo)
297 ms
372 ms
100%
Europe (Germany)
397 ms
598 ms
100%
South America (São Paulo)
291 ms
348 ms
100%
US (Central)
175 ms
249 ms
100%
Measured from US (Central), ai21 responds in 175 ms; from Europe (Germany) the same API takes 397 ms — 2.3× longer for an identical request. That difference is the network path, not the model, and it applies to every call you make.
What is actually being measured here?
A probe in each region opens a real connection to ai21’s own API host every five
minutes and times DNS resolution, the TCP handshake, the TLS handshake and the first byte of the
response. Nothing is routed through a gateway or aggregator, so these figures describe
ai21’s infrastructure rather than a reseller’s. Uptime counts a probe as failed only when the
service genuinely fails — a 401 from an unauthenticated probe means the endpoint answered
correctly and is counted as up.
What this page does not tell you
These are edge latency numbers: the time before the model begins generating. They
say nothing about answer quality, throughput, price, or how long a full completion takes — those
depend on the model you call. Edge latency matters because it is unavoidable: it is paid on every
request, before a single token exists, and no prompt engineering removes it. Where an API key is
available, inference time-to-first-token is measured separately and shown on the region pages with the
model named next to the figure. Likewise, an unauthenticated probe cannot see errors that hit only some
models or some accounts — the kind a status page usually reports — which is why ai21’s
own reports are shown next to the measurements rather than folded into them.