OpenAI AI Gateway Benchmark
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Cold E2E
633ms
Median
Warm TTFT
570ms
Median
Tokens/sec
54
Median
DNS
1.3ms
Median
TCP
1.5ms
Median
TLS
5.5ms
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
TCP1.5ms
TLS5.5ms
To First Byte355.6ms
First Byte → Token260.2ms