openrouter vs xai — AI API latency comparison
As of July 24, 2026, openrouter has lower edge latency (time-to-first-byte) than xai in 4 of 4 measured region(s). From South America (São Paulo), openrouter responds in 56 ms p50 vs 270 ms.
Edge latency by region
| Region | openrouter p50 TTFB | xai p50 TTFB | Faster |
|---|---|---|---|
| Asia (Tokyo) | 53 ms | 172 ms | openrouter |
| Europe (Germany) | 99 ms | 298 ms | openrouter |
| South America (São Paulo) | 56 ms | 270 ms | openrouter |
| US (Central) | 58 ms | 129 ms | openrouter |
Full details: openrouter by region · xai by region.