OpenAI AI Gateway Benchmark
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Cold E2E
473ms
Median
Warm TTFT
405ms
Median
Tokens/sec
83
Median
DNS
0.7ms
Median
TCP
19.9ms
Median
TLS
22.0ms
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.
DNS0.7ms
TCP19.9ms
TLS22.0ms
To First Byte292.6ms
First Byte → Token90.7ms