OpenAI AI Gateway Benchmark
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Cold E2E
1086ms
Median
Warm TTFT
1064ms
Median
Tokens/sec
55
Median
DNS
1.6ms
Median
TCP
1.5ms
Median
TLS
6.3ms
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.
DNS1.6ms
TCP1.5ms
TLS6.3ms
To First Byte116.5ms
First Byte → Token950.5ms