# AI API latency, week of 14 September 2026: what actually moved

Published 2026-09-21 · covers 14 September 2026

Week of 14 September 2026: 2 different providers were fastest across the 4 regions we measure from, and 4 provider-region pairs moved by more than a quarter against the week before. Who led each region last week? Region Fastest p50 TTFB Uptime Asia (Tokyo) fireworks 19 ms 100% Europe (Germany) fireworks 98 ms 100% South America (São Paulo) openrouter 61 ms 100% US (Central) fireworks 28 ms 100% What changed by more than 25%? Provider Region Week before This week Change hyperbolic US (Central) 144 ms 222 ms +54% baseten US (Central) 66 ms 47 ms -30% inference-net US (Central) 152 ms 108 ms -29% fireworks US (Central) 39 ms 28 ms -27%

Source: https://llmlatency.dev/blog/latency-week-2026-w38 · CC BY 4.0