OpenRouter
Anthropic AI Gateway Benchmark

Request Latency

100% success
Cold E2E
590ms
Median
Warm TTFT
497ms
Median
Tokens/sec
53
Median
DNS
1.3ms
Median
TCP
1.1ms
Median
TLS
3.9ms
Median

Cold Connection Breakdown

Where a fresh request's time goes: DNS lookup, TCP connect, TLS handshake, then time to first response byte, then first byte to first streamed token.

DNS1.3ms
TCP1.1ms
TLS3.9ms
To First Byte569.5ms
First Byte → Token6.0ms

Performance Over Time

Iteration Distribution

Cold E2E

Warm TTFT

Tokens/sec

DNS

TCP

TLS

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