OpenAI AI Gateway Benchmark
Request Latency
Cold E2E
856ms
Median
Warm TTFT
697ms
Median
Tokens/sec
48
Median
DNS
1.1ms
Median
TCP
1.2ms
Median
TLS
6.2ms
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.
DNS1.1ms
TCP1.2ms
TLS6.2ms
To First Byte591.8ms
First Byte → Token246.6ms
Performance Over Time
Iteration Distribution
Cold E2E
Warm TTFT
Tokens/sec
DNS
TCP
TLS
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