OpenAI AI Gateway Benchmark
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Cold E2E
443ms
Median
Warm TTFT
404ms
Median
Tokens/sec
79
Median
DNS
1.0ms
Median
TCP
1.4ms
Median
TLS
5.6ms
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.
DNS1.0ms
TCP1.4ms
TLS5.6ms
To First Byte320.3ms
First Byte → Token104.6ms