OpenAI AI Gateway Benchmark
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Cold E2E
683ms
Median
Warm TTFT
518ms
Median
Tokens/sec
53
Median
DNS
1.8ms
Median
TCP
1.0ms
Median
TLS
7.5ms
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.
DNS1.8ms
TCP1.0ms
TLS7.5ms
To First Byte427.3ms
First Byte → Token234.8ms