Fastest AI API from South America (São Paulo)

Last verified October 22, 2026 · edge + inference latency

As of October 22, 2026, measured from South America (São Paulo), the fastest AI inference API by edge latency (time-to-first-byte) is openrouter at 61 ms p50 (n=289).

Which AI API is fastest from South America (São Paulo)?

Endpoint response (TTFB) · last 24 hours · milliseconds (ms) · lower is faster.

openrouter leads by 81 ms over google here. The median provider measured from South America (São Paulo) answers in 326 ms, so the spread between the fastest and a typical option is 264 ms on every single request — before the model has produced anything.

Inference latency (time-to-first-token)

Each provider is measured on the model named below — model size affects TTFT far more than the network does, so these numbers are not a like-for-like ranking of providers. Use the edge-latency table above for that. Coverage is limited to providers we hold an API key for.

First model token (TTFT) · last 24 hours · milliseconds (ms) · lower is faster.

Why measure from South America (São Paulo) separately?

Latency is a property of a route, not of a company. The same provider can lead in one region and trail in another, so a ranking produced from a single location tells you very little about what your users will experience somewhere else. This page reports only what was measured from South America (São Paulo); the other regions are ranked independently and often disagree — see the cross-region summary for how far apart they get.

How should these numbers be read?

p50 is the typical request and p95 is the slow tail: if p95 is far above p50, that provider is inconsistent from here, which usually hurts more than a slightly higher median. Uptime counts a probe as failed only on a genuine service failure — an authentication error means the endpoint answered correctly and counts as up. All figures cover the last 24 hours and are recomputed continuously; the methodology page states the limits of this data plainly.