OpenAI AI Gateway Benchmark
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Cold E2E
456ms
Median
Warm TTFT
372ms
Median
Tokens/sec
80
Median
DNS
1.6ms
Median
TCP
0.9ms
Median
TLS
6.8ms
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
TCP0.9ms
TLS6.8ms
To First Byte348.2ms
First Byte → Token89.9ms