OpenAI AI Gateway Benchmark
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Cold E2E
657ms
Median
Warm TTFT
530ms
Median
Tokens/sec
57
Median
DNS
0.9ms
Median
TCP
13.2ms
Median
TLS
15.4ms
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.
DNS0.9ms
TCP13.2ms
TLS15.4ms
To First Byte356.3ms
First Byte → Token235.0ms